From 85e3706e1a4a70427213f737161926cf5ef52ad4 Mon Sep 17 00:00:00 2001
From: Richard DeMarco <richard.demarco@xero.com>
Date: Wed, 30 Aug 2023 12:42:25 -0600
Subject: [PATCH] update to XeroOpenAPI v2.40.0

---
 docs/accounting/index.html                    | 4013 ++++++++++++++---
 docs/appstore/index.html                      |   62 +-
 docs/assets/index.html                        |   48 +-
 docs/bankfeeds/index.html                     |   71 +-
 docs/files/index.html                         |  140 +-
 docs/finance/index.html                       |    4 +-
 docs/payroll-au/index.html                    |  349 +-
 docs/payroll-nz/index.html                    |  669 ++-
 docs/payroll-uk/index.html                    |  623 ++-
 docs/projects/index.html                      |  163 +-
 package.json                                  |    2 +-
 src/gen/api/accountingApi.ts                  |  617 ++-
 src/gen/api/appStoreApi.ts                    |   12 +-
 src/gen/api/assetApi.ts                       |   12 +-
 src/gen/api/bankfeedsApi.ts                   |   16 +-
 src/gen/api/filesApi.ts                       |   28 +-
 src/gen/api/financeApi.ts                     |    4 +-
 src/gen/api/payrollAUApi.ts                   |   64 +-
 src/gen/api/payrollNZApi.ts                   |  120 +-
 src/gen/api/payrollUKApi.ts                   |  112 +-
 src/gen/api/projectApi.ts                     |   32 +-
 src/gen/model/accounting/accountType.ts       |    6 +-
 src/gen/model/accounting/allocation.ts        |   18 +
 src/gen/model/accounting/contact.ts           |    9 -
 src/gen/model/accounting/models.ts            |    1 +
 .../model/accounting/tenNinetyNineContact.ts  |   38 +
 src/gen/model/finance/problemType.ts          |    3 +-
 src/gen/model/payroll-au/leavePeriodStatus.ts |    4 +-
 28 files changed, 6168 insertions(+), 1072 deletions(-)

diff --git a/docs/accounting/index.html b/docs/accounting/index.html
index e82d1689d..4381d0d80 100644
--- a/docs/accounting/index.html
+++ b/docs/accounting/index.html
@@ -975,7 +975,7 @@
   "title" : "",
   "type" : "string",
   "description" : "See Account Types",
-  "enum" : [ "BANK", "CURRENT", "CURRLIAB", "DEPRECIATN", "DIRECTCOSTS", "EQUITY", "EXPENSE", "FIXED", "INVENTORY", "LIABILITY", "NONCURRENT", "OTHERINCOME", "OVERHEADS", "PREPAYMENT", "REVENUE", "SALES", "TERMLIAB", "PAYGLIABILITY", "PAYG", "SUPERANNUATIONEXPENSE", "SUPERANNUATIONLIABILITY", "WAGESEXPENSE" ]
+  "enum" : [ "BANK", "CURRENT", "CURRLIAB", "DEPRECIATN", "DIRECTCOSTS", "EQUITY", "EXPENSE", "FIXED", "INVENTORY", "LIABILITY", "NONCURRENT", "OTHERINCOME", "OVERHEADS", "PREPAYMENT", "REVENUE", "SALES", "TERMLIAB", "PAYG" ]
 };
       defs["Accounts"] = {
   "title" : "",
@@ -1183,6 +1183,11 @@
   "required" : [ "Amount", "Date", "Invoice" ],
   "type" : "object",
   "properties" : {
+    "AllocationID" : {
+      "type" : "string",
+      "description" : "Xero generated unique identifier",
+      "format" : "uuid"
+    },
     "Invoice" : {
       "$ref" : "#/components/schemas/Invoice"
     },
@@ -1206,6 +1211,11 @@
       "description" : "the date the allocation is applied YYYY-MM-DD.",
       "x-is-msdate" : true
     },
+    "IsDeleted" : {
+      "type" : "boolean",
+      "description" : "A flag that returns true when the allocation is succesfully deleted",
+      "readOnly" : true
+    },
     "StatusAttributeString" : {
       "type" : "string",
       "description" : "A string to indicate if a invoice status"
@@ -2068,10 +2078,6 @@
       "type" : "string",
       "description" : "Email address of contact person (umlauts not supported) (max length  = 255)"
     },
-    "SkypeUserName" : {
-      "type" : "string",
-      "description" : "Skype user name of contact"
-    },
     "ContactPersons" : {
       "type" : "array",
       "description" : "See contact persons",
@@ -5810,6 +5816,19 @@
       "type" : "string",
       "description" : "Contact contact id",
       "format" : "uuid"
+    },
+    "LegalName" : {
+      "type" : "string",
+      "description" : "Contact legal name"
+    },
+    "BusinessName" : {
+      "type" : "string",
+      "description" : "Contact business name"
+    },
+    "FederalTaxClassification" : {
+      "type" : "string",
+      "description" : "Contact federal tax classification",
+      "enum" : [ "SOLE_PROPRIETOR", "PARTNERSHIP", "TRUST_OR_ESTATE", "NONPROFIT", "C_CORP", "S_CORP", "OTHER" ]
     }
   },
   "description" : ""
@@ -6075,7 +6094,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Accounting"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Accounting"><strong>VSN: </strong>4.35.0</li>
+              <li class="nav-header" data-group="Accounting"><strong>VSN: </strong>4.36.0</li>
               <li class="nav-header" data-group="Accounting"><a href="#api-Accounting">Methods</a></li>
               <li data-group="Accounting" data-name="createAccount" class="">
                 <a href="#api-Accounting-createAccount">createAccount</a>
@@ -6260,15 +6279,24 @@
               <li data-group="Accounting" data-name="deleteContactGroupContacts" class="">
                 <a href="#api-Accounting-deleteContactGroupContacts">deleteContactGroupContacts</a>
               </li>
+              <li data-group="Accounting" data-name="deleteCreditNoteAllocations" class="">
+                <a href="#api-Accounting-deleteCreditNoteAllocations">deleteCreditNoteAllocations</a>
+              </li>
               <li data-group="Accounting" data-name="deleteItem" class="">
                 <a href="#api-Accounting-deleteItem">deleteItem</a>
               </li>
               <li data-group="Accounting" data-name="deleteLinkedTransaction" class="">
                 <a href="#api-Accounting-deleteLinkedTransaction">deleteLinkedTransaction</a>
               </li>
+              <li data-group="Accounting" data-name="deleteOverpaymentAllocations" class="">
+                <a href="#api-Accounting-deleteOverpaymentAllocations">deleteOverpaymentAllocations</a>
+              </li>
               <li data-group="Accounting" data-name="deletePayment" class="">
                 <a href="#api-Accounting-deletePayment">deletePayment</a>
               </li>
+              <li data-group="Accounting" data-name="deletePrepaymentAllocations" class="">
+                <a href="#api-Accounting-deletePrepaymentAllocations">deletePrepaymentAllocations</a>
+              </li>
               <li data-group="Accounting" data-name="deleteTrackingCategory" class="">
                 <a href="#api-Accounting-deleteTrackingCategory">deleteTrackingCategory</a>
               </li>
@@ -6536,6 +6564,9 @@
               <li data-group="Accounting" data-name="getPurchaseOrderAsPdf" class="">
                 <a href="#api-Accounting-getPurchaseOrderAsPdf">getPurchaseOrderAsPdf</a>
               </li>
+              <li data-group="Accounting" data-name="getPurchaseOrderAttachmentByFileName" class="">
+                <a href="#api-Accounting-getPurchaseOrderAttachmentByFileName">getPurchaseOrderAttachmentByFileName</a>
+              </li>
               <li data-group="Accounting" data-name="getPurchaseOrderAttachmentById" class="">
                 <a href="#api-Accounting-getPurchaseOrderAttachmentById">getPurchaseOrderAttachmentById</a>
               </li>
@@ -6551,9 +6582,6 @@
               <li data-group="Accounting" data-name="getPurchaseOrders" class="">
                 <a href="#api-Accounting-getPurchaseOrders">getPurchaseOrders</a>
               </li>
-              <li data-group="Accounting" data-name="getPurchaseOrder≠AttachmentByFileName" class="">
-                <a href="#api-Accounting-getPurchaseOrder≠AttachmentByFileName">getPurchaseOrder≠AttachmentByFileName</a>
-              </li>
               <li data-group="Accounting" data-name="getQuote" class="">
                 <a href="#api-Accounting-getQuote">getQuote</a>
               </li>
@@ -6820,6 +6848,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 
 const account: Account = { 
   code: "123456",
@@ -6829,7 +6858,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createAccount(xeroTenantId, account);
+  const response = await xero.accountingApi.createAccount(xeroTenantId, account, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -6874,6 +6903,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createAccount_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -6945,6 +6994,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const accountID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -6952,7 +7002,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.createAccountAttachmentByFileName(xeroTenantId, accountID, fileName, body, {
+  const response = await xero.accountingApi.createAccountAttachmentByFileName(xeroTenantId, accountID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -7057,6 +7107,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createAccountAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -7128,6 +7198,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const bankTransactionID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -7135,7 +7206,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.createBankTransactionAttachmentByFileName(xeroTenantId, bankTransactionID, fileName, body, {
+  const response = await xero.accountingApi.createBankTransactionAttachmentByFileName(xeroTenantId, bankTransactionID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -7240,6 +7311,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createBankTransactionAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -7310,6 +7401,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const bankTransactionID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -7320,7 +7412,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createBankTransactionHistoryRecord(xeroTenantId, bankTransactionID, historyRecords);
+  const response = await xero.accountingApi.createBankTransactionHistoryRecord(xeroTenantId, bankTransactionID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -7398,6 +7490,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createBankTransactionHistoryRecord_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -7467,6 +7579,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const unitdp = 4;
 
@@ -7499,7 +7612,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createBankTransactions(xeroTenantId, bankTransactions,  summarizeErrors, unitdp);
+  const response = await xero.accountingApi.createBankTransactions(xeroTenantId, bankTransactions, idempotencyKey, summarizeErrors, unitdp);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -7544,6 +7657,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createBankTransactions_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -7660,6 +7793,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 
 const fromBankAccount: Account = { 
   accountID: "00000000-0000-0000-0000-000000000000"
@@ -7680,7 +7814,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createBankTransfer(xeroTenantId, bankTransfers);
+  const response = await xero.accountingApi.createBankTransfer(xeroTenantId, bankTransfers, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -7725,6 +7859,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createBankTransfer_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -7796,6 +7950,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const bankTransferID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -7803,7 +7958,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.createBankTransferAttachmentByFileName(xeroTenantId, bankTransferID, fileName, body, {
+  const response = await xero.accountingApi.createBankTransferAttachmentByFileName(xeroTenantId, bankTransferID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -7908,6 +8063,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createBankTransferAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -7978,6 +8153,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const bankTransferID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -7988,7 +8164,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createBankTransferHistoryRecord(xeroTenantId, bankTransferID, historyRecords);
+  const response = await xero.accountingApi.createBankTransferHistoryRecord(xeroTenantId, bankTransferID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -8066,6 +8242,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createBankTransferHistoryRecord_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -8136,6 +8332,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const summarizeErrors = true;
+const idempotencyKey = 'KEY_VALUE';
 const currDate = '2020-12-10'
 
 const paymentAccount: Account = { 
@@ -8171,7 +8368,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createBatchPayment(xeroTenantId, batchPayments,  summarizeErrors);
+  const response = await xero.accountingApi.createBatchPayment(xeroTenantId, batchPayments,  summarizeErrors,idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -8216,6 +8413,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createBatchPayment_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -8313,6 +8530,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const batchPaymentID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -8323,7 +8541,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createBatchPaymentHistoryRecord(xeroTenantId, batchPaymentID, historyRecords);
+  const response = await xero.accountingApi.createBatchPaymentHistoryRecord(xeroTenantId, batchPaymentID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -8401,6 +8619,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createBatchPaymentHistoryRecord_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -8471,6 +8709,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const brandingThemeID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const paymentService: PaymentService = { 
   paymentServiceID: "00000000-0000-0000-0000-000000000000",
@@ -8484,7 +8723,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createBrandingThemePaymentServices(xeroTenantId, brandingThemeID, paymentServices);
+  const response = await xero.accountingApi.createBrandingThemePaymentServices(xeroTenantId, brandingThemeID, paymentServices, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -8562,6 +8801,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createBrandingThemePaymentServices_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -8633,6 +8892,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const contactID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -8640,7 +8900,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.createContactAttachmentByFileName(xeroTenantId, contactID, fileName, body, {
+  const response = await xero.accountingApi.createContactAttachmentByFileName(xeroTenantId, contactID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -8745,6 +9005,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createContactAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -8814,6 +9094,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 
 const contactGroup: ContactGroup = { 
   name: "VIPs"
@@ -8824,7 +9105,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createContactGroup(xeroTenantId, contactGroups);
+  const response = await xero.accountingApi.createContactGroup(xeroTenantId, contactGroups, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -8869,6 +9150,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createContactGroup_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -8939,6 +9240,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const contactGroupID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const contact: Contact = { 
   contactID: "00000000-0000-0000-0000-000000000000"
@@ -8949,7 +9251,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createContactGroupContacts(xeroTenantId, contactGroupID, contacts);
+  const response = await xero.accountingApi.createContactGroupContacts(xeroTenantId, contactGroupID, contacts, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -9027,6 +9329,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createContactGroupContacts_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -9097,6 +9419,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const contactID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -9107,7 +9430,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createContactHistory(xeroTenantId, contactID, historyRecords);
+  const response = await xero.accountingApi.createContactHistory(xeroTenantId, contactID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -9185,6 +9508,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createContactHistory_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -9254,6 +9597,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 
 const phone: Phone = { 
@@ -9274,7 +9618,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createContacts(xeroTenantId, contacts,  summarizeErrors);
+  const response = await xero.accountingApi.createContacts(xeroTenantId, contacts, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -9319,6 +9663,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createContacts_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -9416,6 +9780,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const creditNoteID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const currDate = '2020-12-10'
 
@@ -9434,7 +9799,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createCreditNoteAllocation(xeroTenantId, creditNoteID, allocations,  summarizeErrors);
+  const response = await xero.accountingApi.createCreditNoteAllocation(xeroTenantId, creditNoteID, allocations, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -9512,6 +9877,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createCreditNoteAllocation_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -9610,6 +9995,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const creditNoteID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const includeOnline = true;
 const path = require("path");
 const mime = require("mime-types");
@@ -9618,7 +10004,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.createCreditNoteAttachmentByFileName(xeroTenantId, creditNoteID, fileName, body,  includeOnline, {
+  const response = await xero.accountingApi.createCreditNoteAttachmentByFileName(xeroTenantId, creditNoteID, fileName, body, idempotencyKey, includeOnline, {
     headers: {
       "Content-Type": contentType,
     }
@@ -9723,6 +10109,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createCreditNoteAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -9820,6 +10226,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const creditNoteID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -9830,7 +10237,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createCreditNoteHistory(xeroTenantId, creditNoteID, historyRecords);
+  const response = await xero.accountingApi.createCreditNoteHistory(xeroTenantId, creditNoteID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -9908,6 +10315,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createCreditNoteHistory_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -9977,6 +10404,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const unitdp = 4;
 const currDate = '2020-12-10'
@@ -10006,7 +10434,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createCreditNotes(xeroTenantId, creditNotes,  summarizeErrors, unitdp);
+  const response = await xero.accountingApi.createCreditNotes(xeroTenantId, creditNotes, idempotencyKey, summarizeErrors, unitdp);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -10051,6 +10479,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createCreditNotes_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -10167,6 +10615,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 
 const currency: Currency = { 
   code: CurrencyCode.USD,
@@ -10174,7 +10623,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createCurrency(xeroTenantId, currency);
+  const response = await xero.accountingApi.createCurrency(xeroTenantId, currency, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -10219,6 +10668,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createCurrency_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -10288,6 +10757,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 
 const employee: Employee = { 
@@ -10300,7 +10770,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployees(xeroTenantId, employees,  summarizeErrors);
+  const response = await xero.accountingApi.createEmployees(xeroTenantId, employees, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -10345,6 +10815,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployees_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -10442,6 +10932,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const expenseClaimID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -10452,7 +10943,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createExpenseClaimHistory(xeroTenantId, expenseClaimID, historyRecords);
+  const response = await xero.accountingApi.createExpenseClaimHistory(xeroTenantId, expenseClaimID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -10530,6 +11021,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createExpenseClaimHistory_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -10599,6 +11110,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const currDate = '2020-12-10'
 
 const user: User = { 
@@ -10623,7 +11135,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createExpenseClaims(xeroTenantId, expenseClaims);
+  const response = await xero.accountingApi.createExpenseClaims(xeroTenantId, expenseClaims, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -10668,6 +11180,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createExpenseClaims_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -10739,6 +11271,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const invoiceID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const includeOnline = true;
 const path = require("path");
 const mime = require("mime-types");
@@ -10747,7 +11280,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.createInvoiceAttachmentByFileName(xeroTenantId, invoiceID, fileName, body,  includeOnline, {
+  const response = await xero.accountingApi.createInvoiceAttachmentByFileName(xeroTenantId, invoiceID, fileName, body, idempotencyKey, includeOnline, {
     headers: {
       "Content-Type": contentType,
     }
@@ -10852,6 +11385,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createInvoiceAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -10949,6 +11502,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const invoiceID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -10959,7 +11513,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createInvoiceHistory(xeroTenantId, invoiceID, historyRecords);
+  const response = await xero.accountingApi.createInvoiceHistory(xeroTenantId, invoiceID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -11037,6 +11591,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createInvoiceHistory_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -11106,6 +11680,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const unitdp = 4;
 const dateValue = '2020-10-10'
@@ -11147,7 +11722,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createInvoices(xeroTenantId, invoices,  summarizeErrors, unitdp);
+  const response = await xero.accountingApi.createInvoices(xeroTenantId, invoices, idempotencyKey, summarizeErrors, unitdp);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -11192,6 +11767,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createInvoices_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -11309,6 +11904,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const itemID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -11319,7 +11915,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createItemHistory(xeroTenantId, itemID, historyRecords);
+  const response = await xero.accountingApi.createItemHistory(xeroTenantId, itemID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -11397,6 +11993,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createItemHistory_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -11466,6 +12082,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const unitdp = 4;
 
@@ -11486,7 +12103,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createItems(xeroTenantId, items,  summarizeErrors, unitdp);
+  const response = await xero.accountingApi.createItems(xeroTenantId, items, idempotencyKey, summarizeErrors, unitdp);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -11531,6 +12148,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createItems_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -11647,6 +12284,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 
 const linkedTransaction: LinkedTransaction = { 
   sourceTransactionID: "00000000-0000-0000-0000-000000000000",
@@ -11654,7 +12292,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createLinkedTransaction(xeroTenantId, linkedTransaction);
+  const response = await xero.accountingApi.createLinkedTransaction(xeroTenantId, linkedTransaction, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -11699,6 +12337,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createLinkedTransaction_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -11770,6 +12428,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const manualJournalID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -11777,7 +12436,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.createManualJournalAttachmentByFileName(xeroTenantId, manualJournalID, fileName, body, {
+  const response = await xero.accountingApi.createManualJournalAttachmentByFileName(xeroTenantId, manualJournalID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -11882,6 +12541,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createManualJournalAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -11952,6 +12631,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const manualJournalID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -11962,7 +12642,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createManualJournalHistoryRecord(xeroTenantId, manualJournalID, historyRecords);
+  const response = await xero.accountingApi.createManualJournalHistoryRecord(xeroTenantId, manualJournalID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12040,6 +12720,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createManualJournalHistoryRecord_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12109,6 +12809,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const dateValue = '2020-10-10'  
 const manualJournalLines = [];
@@ -12138,7 +12839,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createManualJournals(xeroTenantId, manualJournals,  summarizeErrors);
+  const response = await xero.accountingApi.createManualJournals(xeroTenantId, manualJournals, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12183,6 +12884,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createManualJournals_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12280,6 +13001,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const overpaymentID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const currDate = '2020-12-10'
 
@@ -12298,7 +13020,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createOverpaymentAllocations(xeroTenantId, overpaymentID, allocations,  summarizeErrors);
+  const response = await xero.accountingApi.createOverpaymentAllocations(xeroTenantId, overpaymentID, allocations, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12376,6 +13098,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createOverpaymentAllocations_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12473,6 +13215,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const overpaymentID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -12483,7 +13226,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createOverpaymentHistory(xeroTenantId, overpaymentID, historyRecords);
+  const response = await xero.accountingApi.createOverpaymentHistory(xeroTenantId, overpaymentID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12561,6 +13304,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createOverpaymentHistory_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12630,6 +13393,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const dateValue = '2020-10-10'
 
 const invoice: Invoice = { 
@@ -12652,7 +13416,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createPayment(xeroTenantId, payment);
+  const response = await xero.accountingApi.createPayment(xeroTenantId, payment, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12697,6 +13461,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createPayment_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12767,6 +13551,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const paymentID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -12777,7 +13562,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createPaymentHistory(xeroTenantId, paymentID, historyRecords);
+  const response = await xero.accountingApi.createPaymentHistory(xeroTenantId, paymentID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12855,6 +13640,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createPaymentHistory_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12924,6 +13729,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 
 const paymentService: PaymentService = { 
   paymentServiceName: "ACME Payments",
@@ -12936,7 +13742,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createPaymentService(xeroTenantId, paymentServices);
+  const response = await xero.accountingApi.createPaymentService(xeroTenantId, paymentServices, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12981,6 +13787,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createPaymentService_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -13050,6 +13876,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const dateValue = '2020-10-10'
 
@@ -13073,7 +13900,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createPayments(xeroTenantId, payments,  summarizeErrors);
+  const response = await xero.accountingApi.createPayments(xeroTenantId, payments, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -13118,6 +13945,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createPayments_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -13215,6 +14062,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const prepaymentID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const currDate = '2020-12-10'
 
@@ -13233,7 +14081,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createPrepaymentAllocations(xeroTenantId, prepaymentID, allocations,  summarizeErrors);
+  const response = await xero.accountingApi.createPrepaymentAllocations(xeroTenantId, prepaymentID, allocations, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -13311,6 +14159,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createPrepaymentAllocations_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -13408,6 +14276,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const prepaymentID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -13418,7 +14287,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createPrepaymentHistory(xeroTenantId, prepaymentID, historyRecords);
+  const response = await xero.accountingApi.createPrepaymentHistory(xeroTenantId, prepaymentID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -13496,6 +14365,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createPrepaymentHistory_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -13567,6 +14456,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const purchaseOrderID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -13574,7 +14464,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.createPurchaseOrderAttachmentByFileName(xeroTenantId, purchaseOrderID, fileName, body, {
+  const response = await xero.accountingApi.createPurchaseOrderAttachmentByFileName(xeroTenantId, purchaseOrderID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -13679,6 +14569,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createPurchaseOrderAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -13749,6 +14659,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const purchaseOrderID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -13759,7 +14670,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createPurchaseOrderHistory(xeroTenantId, purchaseOrderID, historyRecords);
+  const response = await xero.accountingApi.createPurchaseOrderHistory(xeroTenantId, purchaseOrderID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -13837,6 +14748,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createPurchaseOrderHistory_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -13906,6 +14837,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const dateValue = '2020-10-10'
 
@@ -13933,7 +14865,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createPurchaseOrders(xeroTenantId, purchaseOrders,  summarizeErrors);
+  const response = await xero.accountingApi.createPurchaseOrders(xeroTenantId, purchaseOrders, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -13978,6 +14910,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createPurchaseOrders_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -14076,6 +15028,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const quoteID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -14083,7 +15036,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.createQuoteAttachmentByFileName(xeroTenantId, quoteID, fileName, body, {
+  const response = await xero.accountingApi.createQuoteAttachmentByFileName(xeroTenantId, quoteID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -14188,6 +15141,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createQuoteAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -14258,6 +15231,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const quoteID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -14268,7 +15242,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createQuoteHistory(xeroTenantId, quoteID, historyRecords);
+  const response = await xero.accountingApi.createQuoteHistory(xeroTenantId, quoteID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -14346,6 +15320,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createQuoteHistory_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -14415,6 +15409,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const dateValue = '2020-10-10'
 
@@ -14442,7 +15437,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createQuotes(xeroTenantId, quotes,  summarizeErrors);
+  const response = await xero.accountingApi.createQuotes(xeroTenantId, quotes, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -14487,6 +15482,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createQuotes_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -14583,6 +15598,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const unitdp = 4;
 
 const contact: Contact = { 
@@ -14615,7 +15631,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createReceipt(xeroTenantId, receipts,  unitdp);
+  const response = await xero.accountingApi.createReceipt(xeroTenantId, receipts, idempotencyKey, unitdp);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -14660,6 +15676,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createReceipt_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -14758,6 +15794,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const receiptID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -14765,7 +15802,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.createReceiptAttachmentByFileName(xeroTenantId, receiptID, fileName, body, {
+  const response = await xero.accountingApi.createReceiptAttachmentByFileName(xeroTenantId, receiptID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -14870,6 +15907,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createReceiptAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -14940,6 +15997,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const receiptID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -14950,7 +16008,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createReceiptHistory(xeroTenantId, receiptID, historyRecords);
+  const response = await xero.accountingApi.createReceiptHistory(xeroTenantId, receiptID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -15028,6 +16086,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createReceiptHistory_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -15099,6 +16177,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const repeatingInvoiceID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -15106,7 +16185,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.createRepeatingInvoiceAttachmentByFileName(xeroTenantId, repeatingInvoiceID, fileName, body, {
+  const response = await xero.accountingApi.createRepeatingInvoiceAttachmentByFileName(xeroTenantId, repeatingInvoiceID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -15211,6 +16290,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createRepeatingInvoiceAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -15281,6 +16380,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const repeatingInvoiceID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const historyRecord: HistoryRecord = { 
   details: "Hello World"
@@ -15291,7 +16391,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createRepeatingInvoiceHistory(xeroTenantId, repeatingInvoiceID, historyRecords);
+  const response = await xero.accountingApi.createRepeatingInvoiceHistory(xeroTenantId, repeatingInvoiceID, historyRecords, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -15369,6 +16469,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createRepeatingInvoiceHistory_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -15438,10 +16558,11 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 
 try {
-  const response = await xero.accountingApi.createRepeatingInvoices(xeroTenantId, repeatingInvoices,  summarizeErrors);
+  const response = await xero.accountingApi.createRepeatingInvoices(xeroTenantId, repeatingInvoices, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -15486,6 +16607,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createRepeatingInvoices_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -15582,6 +16723,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 
 const taxComponent: TaxComponent = { 
   name: "State Tax",
@@ -15599,7 +16741,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createTaxRates(xeroTenantId, taxRates);
+  const response = await xero.accountingApi.createTaxRates(xeroTenantId, taxRates, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -15644,6 +16786,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createTaxRates_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -15713,13 +16875,14 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 
 const trackingCategory: TrackingCategory = { 
   name: "Foobar"
 }; 
 
 try {
-  const response = await xero.accountingApi.createTrackingCategory(xeroTenantId, trackingCategory);
+  const response = await xero.accountingApi.createTrackingCategory(xeroTenantId, trackingCategory, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -15764,6 +16927,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createTrackingCategory_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -15834,13 +17017,14 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const trackingCategoryID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const trackingOption: TrackingOption = { 
   name: "Foobar"
 }; 
 
 try {
-  const response = await xero.accountingApi.createTrackingOptions(xeroTenantId, trackingCategoryID, trackingOption);
+  const response = await xero.accountingApi.createTrackingOptions(xeroTenantId, trackingCategoryID, trackingOption, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -15918,6 +17102,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createTrackingOptions_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -16100,6 +17304,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 
 const batchPaymentDelete: BatchPaymentDelete = { 
   status: "DELETED"
@@ -16108,7 +17313,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.deleteBatchPayment(xeroTenantId, batchPaymentDelete);
+  const response = await xero.accountingApi.deleteBatchPayment(xeroTenantId, batchPaymentDelete, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -16153,6 +17358,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_deleteBatchPayment_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -16222,9 +17447,10 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const batchPaymentID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.deleteBatchPaymentByUrlParam(xeroTenantId, batchPaymentID, batchPaymentDeleteByUrlParam);
+  const response = await xero.accountingApi.deleteBatchPaymentByUrlParam(xeroTenantId, batchPaymentID, batchPaymentDeleteByUrlParam, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -16302,6 +17528,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_deleteBatchPaymentByUrlParam_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -16597,11 +17843,11 @@ <h2>Parameters</h2>
                 </article>
               </div>
               <hr>
-              <div id="api-Accounting-deleteItem">
-                <article id="api-Accounting-deleteItem-0" data-group="User" data-name="deleteItem" data-version="0">
+              <div id="api-Accounting-deleteCreditNoteAllocations">
+                <article id="api-Accounting-deleteCreditNoteAllocations-0" data-group="User" data-name="deleteCreditNoteAllocations" data-version="0">
                   <div class="pull-left">
-                    <h1>deleteItem</h1>
-                    <p>Deletes a specific item</p>
+                    <h1>deleteCreditNoteAllocations</h1>
+                    <p>Deletes an Allocation from a Credit Note</p>
                   </div>
                   <div class="pull-right"></div>
                   <div class="clearfix"></div>
@@ -16609,24 +17855,25 @@ <h1>deleteItem</h1>
                   <p class="marked"></p>
                   <p></p>
                   <br />
-                  <pre class="prettyprint language-html prettyprinted" data-type="delete"><code><span class="pln">/Items/{ItemID}</span></code></pre>
+                  <pre class="prettyprint language-html prettyprinted" data-type="delete"><code><span class="pln">/CreditNotes/{CreditNoteID}/Allocations/{AllocationID}</span></code></pre>
                   <p>
                   <h3>Usage and SDK Samples</h3>
                   </p>
                   <ul class="nav nav-tabs nav-tabs-examples">
                     <!-- *****REPLACE***** comment out the other languages <li> -->
-                    <li class=""><a href="#examples-Accounting-deleteItem-0-javascript">Node</a></li>
+                    <li class=""><a href="#examples-Accounting-deleteCreditNoteAllocations-0-javascript">Node</a></li>
                   </ul>
                   <div class="tab-content">
                     <!-- *****REPLACE***** comment out the other languages tab-pane -->
-                    <div class="tab-pane" id="examples-Accounting-deleteItem-0-javascript">
+                    <div class="tab-pane" id="examples-Accounting-deleteCreditNoteAllocations-0-javascript">
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
-const itemID = '00000000-0000-0000-0000-000000000000';
+const creditNoteID = '00000000-0000-0000-0000-000000000000';
+const allocationID = '00000000-0000-0000-0000-000000000000';
 
 try {
-  const response = await xero.accountingApi.deleteItem(xeroTenantId, itemID);
+  const response = await xero.accountingApi.deleteCreditNoteAllocations(xeroTenantId, creditNoteID, allocationID);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -16638,8 +17885,8 @@ <h2>Scopes</h2>
                   <table>
                     
                     <tr>
-                      <td>accounting.settings</td>
-                      <td>Grant read-write access to organisation and account settings</td>
+                      <td>accounting.transactions</td>
+                      <td>Grant read-write access to bank transactions, credit notes, invoices, repeating invoices</td>
                     </tr>
                     
                   </table>
@@ -16650,11 +17897,11 @@ <h2>Parameters</h2>
                       <th width="150px">Name</th>
                       <th>Description</th>
                     </tr>
-                    <tr><td style="width:150px;">ItemID<span style="color:red;">*</span></td>
+                    <tr><td style="width:150px;">CreditNoteID<span style="color:red;">*</span></td>
 <td>
 
 
-    <div id="d2e199_deleteItem_itemID">
+    <div id="d2e199_deleteCreditNoteAllocations_creditNoteID">
         <div class="json-schema-view">
             <div class="primitive">
                 <span class="type">
@@ -16665,7 +17912,33 @@ <h2>Parameters</h2>
                     </span>
 
                     <div class="inner description marked">
-Unique identifier for an Item
+Unique identifier for a Credit Note
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                    <tr><td style="width:150px;">AllocationID<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_deleteCreditNoteAllocations_allocationID">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    UUID
+                </span>
+                    <span class="format">
+                        (uuid)
+                    </span>
+
+                    <div class="inner description marked">
+Unique identifier for Allocation object
                     </div>
             </div>
                 <div class="inner required">
@@ -16687,7 +17960,7 @@ <h2>Parameters</h2>
 <td>
 
 
-    <div id="d2e199_deleteItem_xeroTenantId">
+    <div id="d2e199_deleteCreditNoteAllocations_xeroTenantId">
         <div class="json-schema-view">
             <div class="primitive">
                 <span class="type">
@@ -16710,11 +17983,11 @@ <h2>Parameters</h2>
                 </article>
               </div>
               <hr>
-              <div id="api-Accounting-deleteLinkedTransaction">
-                <article id="api-Accounting-deleteLinkedTransaction-0" data-group="User" data-name="deleteLinkedTransaction" data-version="0">
+              <div id="api-Accounting-deleteItem">
+                <article id="api-Accounting-deleteItem-0" data-group="User" data-name="deleteItem" data-version="0">
                   <div class="pull-left">
-                    <h1>deleteLinkedTransaction</h1>
-                    <p>Deletes a specific linked transactions (billable expenses)</p>
+                    <h1>deleteItem</h1>
+                    <p>Deletes a specific item</p>
                   </div>
                   <div class="pull-right"></div>
                   <div class="clearfix"></div>
@@ -16722,24 +17995,24 @@ <h1>deleteLinkedTransaction</h1>
                   <p class="marked"></p>
                   <p></p>
                   <br />
-                  <pre class="prettyprint language-html prettyprinted" data-type="delete"><code><span class="pln">/LinkedTransactions/{LinkedTransactionID}</span></code></pre>
+                  <pre class="prettyprint language-html prettyprinted" data-type="delete"><code><span class="pln">/Items/{ItemID}</span></code></pre>
                   <p>
                   <h3>Usage and SDK Samples</h3>
                   </p>
                   <ul class="nav nav-tabs nav-tabs-examples">
                     <!-- *****REPLACE***** comment out the other languages <li> -->
-                    <li class=""><a href="#examples-Accounting-deleteLinkedTransaction-0-javascript">Node</a></li>
+                    <li class=""><a href="#examples-Accounting-deleteItem-0-javascript">Node</a></li>
                   </ul>
                   <div class="tab-content">
                     <!-- *****REPLACE***** comment out the other languages tab-pane -->
-                    <div class="tab-pane" id="examples-Accounting-deleteLinkedTransaction-0-javascript">
+                    <div class="tab-pane" id="examples-Accounting-deleteItem-0-javascript">
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
-const linkedTransactionID = '00000000-0000-0000-0000-000000000000';
+const itemID = '00000000-0000-0000-0000-000000000000';
 
 try {
-  const response = await xero.accountingApi.deleteLinkedTransaction(xeroTenantId, linkedTransactionID);
+  const response = await xero.accountingApi.deleteItem(xeroTenantId, itemID);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -16751,8 +18024,8 @@ <h2>Scopes</h2>
                   <table>
                     
                     <tr>
-                      <td>accounting.transactions</td>
-                      <td>Grant read-write access to bank transactions, credit notes, invoices, repeating invoices</td>
+                      <td>accounting.settings</td>
+                      <td>Grant read-write access to organisation and account settings</td>
                     </tr>
                     
                   </table>
@@ -16763,11 +18036,11 @@ <h2>Parameters</h2>
                       <th width="150px">Name</th>
                       <th>Description</th>
                     </tr>
-                    <tr><td style="width:150px;">LinkedTransactionID<span style="color:red;">*</span></td>
+                    <tr><td style="width:150px;">ItemID<span style="color:red;">*</span></td>
 <td>
 
 
-    <div id="d2e199_deleteLinkedTransaction_linkedTransactionID">
+    <div id="d2e199_deleteItem_itemID">
         <div class="json-schema-view">
             <div class="primitive">
                 <span class="type">
@@ -16778,7 +18051,120 @@ <h2>Parameters</h2>
                     </span>
 
                     <div class="inner description marked">
-Unique identifier for a LinkedTransaction
+Unique identifier for an Item
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                  </table>
+                  <div class="methodsubtabletitle">Header parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">xero-tenant-id<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_deleteItem_xeroTenantId">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+Xero identifier for Tenant
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                  </table>
+                </article>
+              </div>
+              <hr>
+              <div id="api-Accounting-deleteLinkedTransaction">
+                <article id="api-Accounting-deleteLinkedTransaction-0" data-group="User" data-name="deleteLinkedTransaction" data-version="0">
+                  <div class="pull-left">
+                    <h1>deleteLinkedTransaction</h1>
+                    <p>Deletes a specific linked transactions (billable expenses)</p>
+                  </div>
+                  <div class="pull-right"></div>
+                  <div class="clearfix"></div>
+                  <p></p>
+                  <p class="marked"></p>
+                  <p></p>
+                  <br />
+                  <pre class="prettyprint language-html prettyprinted" data-type="delete"><code><span class="pln">/LinkedTransactions/{LinkedTransactionID}</span></code></pre>
+                  <p>
+                  <h3>Usage and SDK Samples</h3>
+                  </p>
+                  <ul class="nav nav-tabs nav-tabs-examples">
+                    <!-- *****REPLACE***** comment out the other languages <li> -->
+                    <li class=""><a href="#examples-Accounting-deleteLinkedTransaction-0-javascript">Node</a></li>
+                  </ul>
+                  <div class="tab-content">
+                    <!-- *****REPLACE***** comment out the other languages tab-pane -->
+                    <div class="tab-pane" id="examples-Accounting-deleteLinkedTransaction-0-javascript">
+                      <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
+
+const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const linkedTransactionID = '00000000-0000-0000-0000-000000000000';
+
+try {
+  const response = await xero.accountingApi.deleteLinkedTransaction(xeroTenantId, linkedTransactionID);
+  console.log(response.body || response.response.statusCode)
+} catch (err) {
+  const error = JSON.stringify(err.response.body, null, 2)
+  console.log(`Status Code: ${err.response.statusCode} => ${error}`);
+}</code></pre>
+                    </div>
+                  </div>
+                  <h2>Scopes</h2>
+                  <table>
+                    
+                    <tr>
+                      <td>accounting.transactions</td>
+                      <td>Grant read-write access to bank transactions, credit notes, invoices, repeating invoices</td>
+                    </tr>
+                    
+                  </table>
+                  <h2>Parameters</h2>
+                  <div class="methodsubtabletitle">Path parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">LinkedTransactionID<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_deleteLinkedTransaction_linkedTransactionID">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    UUID
+                </span>
+                    <span class="format">
+                        (uuid)
+                    </span>
+
+                    <div class="inner description marked">
+Unique identifier for a LinkedTransaction
                     </div>
             </div>
                 <div class="inner required">
@@ -16817,6 +18203,146 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                  </table>
+                </article>
+              </div>
+              <hr>
+              <div id="api-Accounting-deleteOverpaymentAllocations">
+                <article id="api-Accounting-deleteOverpaymentAllocations-0" data-group="User" data-name="deleteOverpaymentAllocations" data-version="0">
+                  <div class="pull-left">
+                    <h1>deleteOverpaymentAllocations</h1>
+                    <p>Deletes an Allocation from an overpayment</p>
+                  </div>
+                  <div class="pull-right"></div>
+                  <div class="clearfix"></div>
+                  <p></p>
+                  <p class="marked"></p>
+                  <p></p>
+                  <br />
+                  <pre class="prettyprint language-html prettyprinted" data-type="delete"><code><span class="pln">/Overpayments/{OverpaymentID}/Allocations/{AllocationID}</span></code></pre>
+                  <p>
+                  <h3>Usage and SDK Samples</h3>
+                  </p>
+                  <ul class="nav nav-tabs nav-tabs-examples">
+                    <!-- *****REPLACE***** comment out the other languages <li> -->
+                    <li class=""><a href="#examples-Accounting-deleteOverpaymentAllocations-0-javascript">Node</a></li>
+                  </ul>
+                  <div class="tab-content">
+                    <!-- *****REPLACE***** comment out the other languages tab-pane -->
+                    <div class="tab-pane" id="examples-Accounting-deleteOverpaymentAllocations-0-javascript">
+                      <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
+
+const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const overpaymentID = '00000000-0000-0000-0000-000000000000';
+const allocationID = '00000000-0000-0000-0000-000000000000';
+
+try {
+  const response = await xero.accountingApi.deleteOverpaymentAllocations(xeroTenantId, overpaymentID, allocationID);
+  console.log(response.body || response.response.statusCode)
+} catch (err) {
+  const error = JSON.stringify(err.response.body, null, 2)
+  console.log(`Status Code: ${err.response.statusCode} => ${error}`);
+}</code></pre>
+                    </div>
+                  </div>
+                  <h2>Scopes</h2>
+                  <table>
+                    
+                    <tr>
+                      <td>accounting.transactions</td>
+                      <td>Grant read-write access to bank transactions, credit notes, invoices, repeating invoices</td>
+                    </tr>
+                    
+                  </table>
+                  <h2>Parameters</h2>
+                  <div class="methodsubtabletitle">Path parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">OverpaymentID<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_deleteOverpaymentAllocations_overpaymentID">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    UUID
+                </span>
+                    <span class="format">
+                        (uuid)
+                    </span>
+
+                    <div class="inner description marked">
+Unique identifier for a Overpayment
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                    <tr><td style="width:150px;">AllocationID<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_deleteOverpaymentAllocations_allocationID">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    UUID
+                </span>
+                    <span class="format">
+                        (uuid)
+                    </span>
+
+                    <div class="inner description marked">
+Unique identifier for Allocation object
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                  </table>
+                  <div class="methodsubtabletitle">Header parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">xero-tenant-id<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_deleteOverpaymentAllocations_xeroTenantId">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+Xero identifier for Tenant
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -16850,13 +18376,14 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const paymentID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const paymentDelete: PaymentDelete = { 
   status: "DELETED"
 }; 
 
 try {
-  const response = await xero.accountingApi.deletePayment(xeroTenantId, paymentID, paymentDelete);
+  const response = await xero.accountingApi.deletePayment(xeroTenantId, paymentID, paymentDelete, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -16934,6 +18461,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_deletePayment_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -16976,6 +18523,146 @@ <h2>Parameters</h2>
                 </article>
               </div>
               <hr>
+              <div id="api-Accounting-deletePrepaymentAllocations">
+                <article id="api-Accounting-deletePrepaymentAllocations-0" data-group="User" data-name="deletePrepaymentAllocations" data-version="0">
+                  <div class="pull-left">
+                    <h1>deletePrepaymentAllocations</h1>
+                    <p>Deletes an Allocation from a Prepayment</p>
+                  </div>
+                  <div class="pull-right"></div>
+                  <div class="clearfix"></div>
+                  <p></p>
+                  <p class="marked"></p>
+                  <p></p>
+                  <br />
+                  <pre class="prettyprint language-html prettyprinted" data-type="delete"><code><span class="pln">/Prepayments/{PrepaymentID}/Allocations/{AllocationID}</span></code></pre>
+                  <p>
+                  <h3>Usage and SDK Samples</h3>
+                  </p>
+                  <ul class="nav nav-tabs nav-tabs-examples">
+                    <!-- *****REPLACE***** comment out the other languages <li> -->
+                    <li class=""><a href="#examples-Accounting-deletePrepaymentAllocations-0-javascript">Node</a></li>
+                  </ul>
+                  <div class="tab-content">
+                    <!-- *****REPLACE***** comment out the other languages tab-pane -->
+                    <div class="tab-pane" id="examples-Accounting-deletePrepaymentAllocations-0-javascript">
+                      <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
+
+const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const prepaymentID = '00000000-0000-0000-0000-000000000000';
+const allocationID = '00000000-0000-0000-0000-000000000000';
+
+try {
+  const response = await xero.accountingApi.deletePrepaymentAllocations(xeroTenantId, prepaymentID, allocationID);
+  console.log(response.body || response.response.statusCode)
+} catch (err) {
+  const error = JSON.stringify(err.response.body, null, 2)
+  console.log(`Status Code: ${err.response.statusCode} => ${error}`);
+}</code></pre>
+                    </div>
+                  </div>
+                  <h2>Scopes</h2>
+                  <table>
+                    
+                    <tr>
+                      <td>accounting.transactions</td>
+                      <td>Grant read-write access to bank transactions, credit notes, invoices, repeating invoices</td>
+                    </tr>
+                    
+                  </table>
+                  <h2>Parameters</h2>
+                  <div class="methodsubtabletitle">Path parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">PrepaymentID<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_deletePrepaymentAllocations_prepaymentID">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    UUID
+                </span>
+                    <span class="format">
+                        (uuid)
+                    </span>
+
+                    <div class="inner description marked">
+Unique identifier for a PrePayment
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                    <tr><td style="width:150px;">AllocationID<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_deletePrepaymentAllocations_allocationID">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    UUID
+                </span>
+                    <span class="format">
+                        (uuid)
+                    </span>
+
+                    <div class="inner description marked">
+Unique identifier for Allocation object
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                  </table>
+                  <div class="methodsubtabletitle">Header parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">xero-tenant-id<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_deletePrepaymentAllocations_xeroTenantId">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+Xero identifier for Tenant
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                  </table>
+                </article>
+              </div>
+              <hr>
               <div id="api-Accounting-deleteTrackingCategory">
                 <article id="api-Accounting-deleteTrackingCategory-0" data-group="User" data-name="deleteTrackingCategory" data-version="0">
                   <div class="pull-left">
@@ -17256,11 +18943,12 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const invoiceID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const requestEmpty: RequestEmpty = { };
 
 try {
-  const response = await xero.accountingApi.emailInvoice(xeroTenantId, invoiceID, requestEmpty);
+  const response = await xero.accountingApi.emailInvoice(xeroTenantId, invoiceID, requestEmpty, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -17338,6 +19026,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_emailInvoice_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -29341,7 +31049,268 @@ <h2>Parameters</h2>
 <td>
 
 
-    <div id="d2e199_getPurchaseOrder_xeroTenantId">
+    <div id="d2e199_getPurchaseOrder_xeroTenantId">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+Xero identifier for Tenant
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                  </table>
+                </article>
+              </div>
+              <hr>
+              <div id="api-Accounting-getPurchaseOrderAsPdf">
+                <article id="api-Accounting-getPurchaseOrderAsPdf-0" data-group="User" data-name="getPurchaseOrderAsPdf" data-version="0">
+                  <div class="pull-left">
+                    <h1>getPurchaseOrderAsPdf</h1>
+                    <p>Retrieves specific purchase order as PDF files using a unique purchase order Id</p>
+                  </div>
+                  <div class="pull-right"></div>
+                  <div class="clearfix"></div>
+                  <p></p>
+                  <p class="marked"></p>
+                  <p></p>
+                  <br />
+                  <pre class="prettyprint language-html prettyprinted" data-type="get"><code><span class="pln">/PurchaseOrders/{PurchaseOrderID}/pdf</span></code></pre>
+                  <p>
+                  <h3>Usage and SDK Samples</h3>
+                  </p>
+                  <ul class="nav nav-tabs nav-tabs-examples">
+                    <!-- *****REPLACE***** comment out the other languages <li> -->
+                    <li class=""><a href="#examples-Accounting-getPurchaseOrderAsPdf-0-javascript">Node</a></li>
+                  </ul>
+                  <div class="tab-content">
+                    <!-- *****REPLACE***** comment out the other languages tab-pane -->
+                    <div class="tab-pane" id="examples-Accounting-getPurchaseOrderAsPdf-0-javascript">
+                      <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
+
+const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const purchaseOrderID = '00000000-0000-0000-0000-000000000000';
+
+try {
+  const response = await xero.accountingApi.getPurchaseOrderAsPdf(xeroTenantId, purchaseOrderID);
+  console.log(response.body || response.response.statusCode)
+} catch (err) {
+  const error = JSON.stringify(err.response.body, null, 2)
+  console.log(`Status Code: ${err.response.statusCode} => ${error}`);
+}</code></pre>
+                    </div>
+                  </div>
+                  <h2>Scopes</h2>
+                  <table>
+                    
+                    <tr>
+                      <td>accounting.transactions</td>
+                      <td>Grant read-write access to bank transactions, credit notes, invoices, repeating invoices</td>
+                    </tr>
+                    
+                    <tr>
+                      <td>accounting.transactions.read</td>
+                      <td>Grant read-only access to invoices</td>
+                    </tr>
+                    
+                  </table>
+                  <h2>Parameters</h2>
+                  <div class="methodsubtabletitle">Path parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">PurchaseOrderID<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_getPurchaseOrderAsPdf_purchaseOrderID">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    UUID
+                </span>
+                    <span class="format">
+                        (uuid)
+                    </span>
+
+                    <div class="inner description marked">
+Unique identifier for an Purchase Order
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                  </table>
+                  <div class="methodsubtabletitle">Header parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">xero-tenant-id<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_getPurchaseOrderAsPdf_xeroTenantId">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+Xero identifier for Tenant
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                  </table>
+                </article>
+              </div>
+              <hr>
+              <div id="api-Accounting-getPurchaseOrderAttachmentByFileName">
+                <article id="api-Accounting-getPurchaseOrderAttachmentByFileName-0" data-group="User" data-name="getPurchaseOrderAttachmentByFileName" data-version="0">
+                  <div class="pull-left">
+                    <h1>getPurchaseOrderAttachmentByFileName</h1>
+                    <p>Retrieves a specific attachment for a specific purchase order by filename</p>
+                  </div>
+                  <div class="pull-right"></div>
+                  <div class="clearfix"></div>
+                  <p></p>
+                  <p class="marked"></p>
+                  <p></p>
+                  <br />
+                  <pre class="prettyprint language-html prettyprinted" data-type="get"><code><span class="pln">/PurchaseOrders/{PurchaseOrderID}/Attachments/{FileName}</span></code></pre>
+                  <p>
+                  <h3>Usage and SDK Samples</h3>
+                  </p>
+                  <ul class="nav nav-tabs nav-tabs-examples">
+                    <!-- *****REPLACE***** comment out the other languages <li> -->
+                    <li class=""><a href="#examples-Accounting-getPurchaseOrderAttachmentByFileName-0-javascript">Node</a></li>
+                  </ul>
+                  <div class="tab-content">
+                    <!-- *****REPLACE***** comment out the other languages tab-pane -->
+                    <div class="tab-pane" id="examples-Accounting-getPurchaseOrderAttachmentByFileName-0-javascript">
+                      <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
+
+const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const purchaseOrderID = '00000000-0000-0000-0000-000000000000';
+const fileName = 'xero-dev.jpg';
+const contentType = 'image/jpg';
+
+try {
+  const response = await xero.accountingApi.getPurchaseOrderAttachmentByFileName(xeroTenantId, purchaseOrderID, fileName, contentType);
+  console.log(response.body || response.response.statusCode)
+} catch (err) {
+  const error = JSON.stringify(err.response.body, null, 2)
+  console.log(`Status Code: ${err.response.statusCode} => ${error}`);
+}</code></pre>
+                    </div>
+                  </div>
+                  <h2>Scopes</h2>
+                  <table>
+                    
+                    <tr>
+                      <td>accounting.attachments</td>
+                      <td>Grant read-write access to attachments</td>
+                    </tr>
+                    
+                    <tr>
+                      <td>accounting.attachments.read</td>
+                      <td>Grant read-only access to attachments</td>
+                    </tr>
+                    
+                  </table>
+                  <h2>Parameters</h2>
+                  <div class="methodsubtabletitle">Path parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">PurchaseOrderID<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_getPurchaseOrderAttachmentByFileName_purchaseOrderID">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    UUID
+                </span>
+                    <span class="format">
+                        (uuid)
+                    </span>
+
+                    <div class="inner description marked">
+Unique identifier for an Purchase Order
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                    <tr><td style="width:150px;">FileName<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_getPurchaseOrderAttachmentByFileName_fileName">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+Name of the attachment
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                  </table>
+                  <div class="methodsubtabletitle">Header parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">xero-tenant-id<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_getPurchaseOrderAttachmentByFileName_xeroTenantId">
         <div class="json-schema-view">
             <div class="primitive">
                 <span class="type">
@@ -29360,106 +31329,11 @@ <h2>Parameters</h2>
 </td>
 </tr>
 
-                  </table>
-                </article>
-              </div>
-              <hr>
-              <div id="api-Accounting-getPurchaseOrderAsPdf">
-                <article id="api-Accounting-getPurchaseOrderAsPdf-0" data-group="User" data-name="getPurchaseOrderAsPdf" data-version="0">
-                  <div class="pull-left">
-                    <h1>getPurchaseOrderAsPdf</h1>
-                    <p>Retrieves specific purchase order as PDF files using a unique purchase order Id</p>
-                  </div>
-                  <div class="pull-right"></div>
-                  <div class="clearfix"></div>
-                  <p></p>
-                  <p class="marked"></p>
-                  <p></p>
-                  <br />
-                  <pre class="prettyprint language-html prettyprinted" data-type="get"><code><span class="pln">/PurchaseOrders/{PurchaseOrderID}/pdf</span></code></pre>
-                  <p>
-                  <h3>Usage and SDK Samples</h3>
-                  </p>
-                  <ul class="nav nav-tabs nav-tabs-examples">
-                    <!-- *****REPLACE***** comment out the other languages <li> -->
-                    <li class=""><a href="#examples-Accounting-getPurchaseOrderAsPdf-0-javascript">Node</a></li>
-                  </ul>
-                  <div class="tab-content">
-                    <!-- *****REPLACE***** comment out the other languages tab-pane -->
-                    <div class="tab-pane" id="examples-Accounting-getPurchaseOrderAsPdf-0-javascript">
-                      <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
-
-const xeroTenantId = 'YOUR_XERO_TENANT_ID';
-const purchaseOrderID = '00000000-0000-0000-0000-000000000000';
-
-try {
-  const response = await xero.accountingApi.getPurchaseOrderAsPdf(xeroTenantId, purchaseOrderID);
-  console.log(response.body || response.response.statusCode)
-} catch (err) {
-  const error = JSON.stringify(err.response.body, null, 2)
-  console.log(`Status Code: ${err.response.statusCode} => ${error}`);
-}</code></pre>
-                    </div>
-                  </div>
-                  <h2>Scopes</h2>
-                  <table>
-                    
-                    <tr>
-                      <td>accounting.transactions</td>
-                      <td>Grant read-write access to bank transactions, credit notes, invoices, repeating invoices</td>
-                    </tr>
-                    
-                    <tr>
-                      <td>accounting.transactions.read</td>
-                      <td>Grant read-only access to invoices</td>
-                    </tr>
-                    
-                  </table>
-                  <h2>Parameters</h2>
-                  <div class="methodsubtabletitle">Path parameters</div>
-                  <table id="methodsubtable">
-                    <tr>
-                      <th width="150px">Name</th>
-                      <th>Description</th>
-                    </tr>
-                    <tr><td style="width:150px;">PurchaseOrderID<span style="color:red;">*</span></td>
-<td>
-
-
-    <div id="d2e199_getPurchaseOrderAsPdf_purchaseOrderID">
-        <div class="json-schema-view">
-            <div class="primitive">
-                <span class="type">
-                    UUID
-                </span>
-                    <span class="format">
-                        (uuid)
-                    </span>
-
-                    <div class="inner description marked">
-Unique identifier for an Purchase Order
-                    </div>
-            </div>
-                <div class="inner required">
-                    Required
-                </div>
-        </div>
-    </div>
-</td>
-</tr>
-
-                  </table>
-                  <div class="methodsubtabletitle">Header parameters</div>
-                  <table id="methodsubtable">
-                    <tr>
-                      <th width="150px">Name</th>
-                      <th>Description</th>
-                    </tr>
-                    <tr><td style="width:150px;">xero-tenant-id<span style="color:red;">*</span></td>
+                    <tr><td style="width:150px;">contentType<span style="color:red;">*</span></td>
 <td>
 
 
-    <div id="d2e199_getPurchaseOrderAsPdf_xeroTenantId">
+    <div id="d2e199_getPurchaseOrderAttachmentByFileName_contentType">
         <div class="json-schema-view">
             <div class="primitive">
                 <span class="type">
@@ -29467,7 +31341,7 @@ <h2>Parameters</h2>
                 </span>
 
                     <div class="inner description marked">
-Xero identifier for Tenant
+The mime type of the attachment file you are retrieving i.e image/jpg, application/pdf
                     </div>
             </div>
                 <div class="inner required">
@@ -30216,172 +32090,6 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
-</tr>
-
-                  </table>
-                </article>
-              </div>
-              <hr>
-              <div id="api-Accounting-getPurchaseOrder≠AttachmentByFileName">
-                <article id="api-Accounting-getPurchaseOrder≠AttachmentByFileName-0" data-group="User" data-name="getPurchaseOrder≠AttachmentByFileName" data-version="0">
-                  <div class="pull-left">
-                    <h1>getPurchaseOrder≠AttachmentByFileName</h1>
-                    <p>Retrieves a specific attachment for a specific purchase order by filename</p>
-                  </div>
-                  <div class="pull-right"></div>
-                  <div class="clearfix"></div>
-                  <p></p>
-                  <p class="marked"></p>
-                  <p></p>
-                  <br />
-                  <pre class="prettyprint language-html prettyprinted" data-type="get"><code><span class="pln">/PurchaseOrders/{PurchaseOrderID}/Attachments/{FileName}</span></code></pre>
-                  <p>
-                  <h3>Usage and SDK Samples</h3>
-                  </p>
-                  <ul class="nav nav-tabs nav-tabs-examples">
-                    <!-- *****REPLACE***** comment out the other languages <li> -->
-                    <li class=""><a href="#examples-Accounting-getPurchaseOrder≠AttachmentByFileName-0-javascript">Node</a></li>
-                  </ul>
-                  <div class="tab-content">
-                    <!-- *****REPLACE***** comment out the other languages tab-pane -->
-                    <div class="tab-pane" id="examples-Accounting-getPurchaseOrder≠AttachmentByFileName-0-javascript">
-                      <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
-
-const xeroTenantId = 'YOUR_XERO_TENANT_ID';
-const purchaseOrderID = '00000000-0000-0000-0000-000000000000';
-const fileName = 'xero-dev.jpg';
-const contentType = 'image/jpg';
-
-try {
-  const response = await xero.accountingApi.getPurchaseOrder≠AttachmentByFileName(xeroTenantId, purchaseOrderID, fileName, contentType);
-  console.log(response.body || response.response.statusCode)
-} catch (err) {
-  const error = JSON.stringify(err.response.body, null, 2)
-  console.log(`Status Code: ${err.response.statusCode} => ${error}`);
-}</code></pre>
-                    </div>
-                  </div>
-                  <h2>Scopes</h2>
-                  <table>
-                    
-                    <tr>
-                      <td>accounting.attachments</td>
-                      <td>Grant read-write access to attachments</td>
-                    </tr>
-                    
-                    <tr>
-                      <td>accounting.attachments.read</td>
-                      <td>Grant read-only access to attachments</td>
-                    </tr>
-                    
-                  </table>
-                  <h2>Parameters</h2>
-                  <div class="methodsubtabletitle">Path parameters</div>
-                  <table id="methodsubtable">
-                    <tr>
-                      <th width="150px">Name</th>
-                      <th>Description</th>
-                    </tr>
-                    <tr><td style="width:150px;">PurchaseOrderID<span style="color:red;">*</span></td>
-<td>
-
-
-    <div id="d2e199_getPurchaseOrder≠AttachmentByFileName_purchaseOrderID">
-        <div class="json-schema-view">
-            <div class="primitive">
-                <span class="type">
-                    UUID
-                </span>
-                    <span class="format">
-                        (uuid)
-                    </span>
-
-                    <div class="inner description marked">
-Unique identifier for an Purchase Order
-                    </div>
-            </div>
-                <div class="inner required">
-                    Required
-                </div>
-        </div>
-    </div>
-</td>
-</tr>
-
-                    <tr><td style="width:150px;">FileName<span style="color:red;">*</span></td>
-<td>
-
-
-    <div id="d2e199_getPurchaseOrder≠AttachmentByFileName_fileName">
-        <div class="json-schema-view">
-            <div class="primitive">
-                <span class="type">
-                    String
-                </span>
-
-                    <div class="inner description marked">
-Name of the attachment
-                    </div>
-            </div>
-                <div class="inner required">
-                    Required
-                </div>
-        </div>
-    </div>
-</td>
-</tr>
-
-                  </table>
-                  <div class="methodsubtabletitle">Header parameters</div>
-                  <table id="methodsubtable">
-                    <tr>
-                      <th width="150px">Name</th>
-                      <th>Description</th>
-                    </tr>
-                    <tr><td style="width:150px;">xero-tenant-id<span style="color:red;">*</span></td>
-<td>
-
-
-    <div id="d2e199_getPurchaseOrder≠AttachmentByFileName_xeroTenantId">
-        <div class="json-schema-view">
-            <div class="primitive">
-                <span class="type">
-                    String
-                </span>
-
-                    <div class="inner description marked">
-Xero identifier for Tenant
-                    </div>
-            </div>
-                <div class="inner required">
-                    Required
-                </div>
-        </div>
-    </div>
-</td>
-</tr>
-
-                    <tr><td style="width:150px;">contentType<span style="color:red;">*</span></td>
-<td>
-
-
-    <div id="d2e199_getPurchaseOrder≠AttachmentByFileName_contentType">
-        <div class="json-schema-view">
-            <div class="primitive">
-                <span class="type">
-                    String
-                </span>
-
-                    <div class="inner description marked">
-The mime type of the attachment file you are retrieving i.e image/jpg, application/pdf
-                    </div>
-            </div>
-                <div class="inner required">
-                    Required
-                </div>
-        </div>
-    </div>
-</td>
 </tr>
 
                   </table>
@@ -35694,6 +37402,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 
 const account: Account = { 
   code: "123",
@@ -35716,7 +37425,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.postSetup(xeroTenantId, setup);
+  const response = await xero.accountingApi.postSetup(xeroTenantId, setup, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -35761,6 +37470,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_postSetup_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -35831,6 +37560,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const accountID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const account: Account = { 
   code: "123456",
@@ -35845,7 +37575,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateAccount(xeroTenantId, accountID, accounts);
+  const response = await xero.accountingApi.updateAccount(xeroTenantId, accountID, accounts, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -35923,6 +37653,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateAccount_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -35994,6 +37744,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const accountID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -36001,7 +37752,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.updateAccountAttachmentByFileName(xeroTenantId, accountID, fileName, body, {
+  const response = await xero.accountingApi.updateAccountAttachmentByFileName(xeroTenantId, accountID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -36106,6 +37857,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateAccountAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -36176,6 +37947,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const bankTransactionID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 const unitdp = 4;
 
 const contact: Contact = { 
@@ -36208,7 +37980,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateBankTransaction(xeroTenantId, bankTransactionID, bankTransactions,  unitdp);
+  const response = await xero.accountingApi.updateBankTransaction(xeroTenantId, bankTransactionID, bankTransactions, idempotencyKey, unitdp);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -36286,6 +38058,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateBankTransaction_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -36383,6 +38175,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const bankTransactionID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -36390,7 +38183,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.updateBankTransactionAttachmentByFileName(xeroTenantId, bankTransactionID, fileName, body, {
+  const response = await xero.accountingApi.updateBankTransactionAttachmentByFileName(xeroTenantId, bankTransactionID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -36478,7 +38271,211 @@ <h2>Parameters</h2>
 <td>
 
 
-    <div id="d2e199_updateBankTransactionAttachmentByFileName_xeroTenantId">
+    <div id="d2e199_updateBankTransactionAttachmentByFileName_xeroTenantId">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+Xero identifier for Tenant
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateBankTransactionAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                  </table>
+                  <div class="methodsubtabletitle">Body parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">body <span style="color:red;">*</span></td>
+<td>
+<div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    byte[]
+                </span>
+
+                    <div class="inner description marked">
+Byte array of file in body of request
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+<script type="application/ld+json">
+    {
+  "description" : "Byte array of file in body of request",
+  "content" : {
+    "application/octet-stream" : {
+      "schema" : {
+        "type" : "string",
+        "format" : "byte"
+      }
+    }
+  },
+  "required" : true
+}
+</script>
+                  </table>
+                </article>
+              </div>
+              <hr>
+              <div id="api-Accounting-updateBankTransferAttachmentByFileName">
+                <article id="api-Accounting-updateBankTransferAttachmentByFileName-0" data-group="User" data-name="updateBankTransferAttachmentByFileName" data-version="0">
+                  <div class="pull-left">
+                    <h1>updateBankTransferAttachmentByFileName</h1>
+                    <p></p>
+                  </div>
+                  <div class="pull-right"></div>
+                  <div class="clearfix"></div>
+                  <p></p>
+                  <p class="marked"></p>
+                  <p></p>
+                  <br />
+                  <pre class="prettyprint language-html prettyprinted" data-type="post"><code><span class="pln">/BankTransfers/{BankTransferID}/Attachments/{FileName}</span></code></pre>
+                  <p>
+                  <h3>Usage and SDK Samples</h3>
+                  </p>
+                  <ul class="nav nav-tabs nav-tabs-examples">
+                    <!-- *****REPLACE***** comment out the other languages <li> -->
+                    <li class=""><a href="#examples-Accounting-updateBankTransferAttachmentByFileName-0-javascript">Node</a></li>
+                  </ul>
+                  <div class="tab-content">
+                    <!-- *****REPLACE***** comment out the other languages tab-pane -->
+                    <div class="tab-pane" id="examples-Accounting-updateBankTransferAttachmentByFileName-0-javascript">
+                      <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
+
+const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const bankTransferID = '00000000-0000-0000-0000-000000000000';
+const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
+const path = require("path");
+const mime = require("mime-types");
+const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
+const body = fs.createReadStream(pathToUpload); // {fs.ReadStream} read the file
+const contentType = mime.lookup(fileName);
+
+try {
+  const response = await xero.accountingApi.updateBankTransferAttachmentByFileName(xeroTenantId, bankTransferID, fileName, body, idempotencyKey, {
+    headers: {
+      "Content-Type": contentType,
+    }
+  });
+  console.log(response.body || response.response.statusCode)
+} catch (err) {
+  const error = JSON.stringify(err.response.body, null, 2)
+  console.log(`Status Code: ${err.response.statusCode} => ${error}`);
+}</code></pre>
+                    </div>
+                  </div>
+                  <h2>Scopes</h2>
+                  <table>
+                    
+                    <tr>
+                      <td>accounting.attachments</td>
+                      <td>Grant read-write access to attachments</td>
+                    </tr>
+                    
+                  </table>
+                  <h2>Parameters</h2>
+                  <div class="methodsubtabletitle">Path parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">BankTransferID<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_updateBankTransferAttachmentByFileName_bankTransferID">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    UUID
+                </span>
+                    <span class="format">
+                        (uuid)
+                    </span>
+
+                    <div class="inner description marked">
+Xero generated unique identifier for a bank transfer
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                    <tr><td style="width:150px;">FileName<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_updateBankTransferAttachmentByFileName_fileName">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+Name of the attachment
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                  </table>
+                  <div class="methodsubtabletitle">Header parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">xero-tenant-id<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_updateBankTransferAttachmentByFileName_xeroTenantId">
         <div class="json-schema-view">
             <div class="primitive">
                 <span class="type">
@@ -36497,141 +38494,11 @@ <h2>Parameters</h2>
 </td>
 </tr>
 
-                  </table>
-                  <div class="methodsubtabletitle">Body parameters</div>
-                  <table id="methodsubtable">
-                    <tr>
-                      <th width="150px">Name</th>
-                      <th>Description</th>
-                    </tr>
-                    <tr><td style="width:150px;">body <span style="color:red;">*</span></td>
+                    <tr><td style="width:150px;">Idempotency-Key</td>
 <td>
-<div class="json-schema-view">
-            <div class="primitive">
-                <span class="type">
-                    byte[]
-                </span>
 
-                    <div class="inner description marked">
-Byte array of file in body of request
-                    </div>
-            </div>
-                <div class="inner required">
-                    Required
-                </div>
-        </div>
-<script type="application/ld+json">
-    {
-  "description" : "Byte array of file in body of request",
-  "content" : {
-    "application/octet-stream" : {
-      "schema" : {
-        "type" : "string",
-        "format" : "byte"
-      }
-    }
-  },
-  "required" : true
-}
-</script>
-                  </table>
-                </article>
-              </div>
-              <hr>
-              <div id="api-Accounting-updateBankTransferAttachmentByFileName">
-                <article id="api-Accounting-updateBankTransferAttachmentByFileName-0" data-group="User" data-name="updateBankTransferAttachmentByFileName" data-version="0">
-                  <div class="pull-left">
-                    <h1>updateBankTransferAttachmentByFileName</h1>
-                    <p></p>
-                  </div>
-                  <div class="pull-right"></div>
-                  <div class="clearfix"></div>
-                  <p></p>
-                  <p class="marked"></p>
-                  <p></p>
-                  <br />
-                  <pre class="prettyprint language-html prettyprinted" data-type="post"><code><span class="pln">/BankTransfers/{BankTransferID}/Attachments/{FileName}</span></code></pre>
-                  <p>
-                  <h3>Usage and SDK Samples</h3>
-                  </p>
-                  <ul class="nav nav-tabs nav-tabs-examples">
-                    <!-- *****REPLACE***** comment out the other languages <li> -->
-                    <li class=""><a href="#examples-Accounting-updateBankTransferAttachmentByFileName-0-javascript">Node</a></li>
-                  </ul>
-                  <div class="tab-content">
-                    <!-- *****REPLACE***** comment out the other languages tab-pane -->
-                    <div class="tab-pane" id="examples-Accounting-updateBankTransferAttachmentByFileName-0-javascript">
-                      <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
-const xeroTenantId = 'YOUR_XERO_TENANT_ID';
-const bankTransferID = '00000000-0000-0000-0000-000000000000';
-const fileName = 'xero-dev.jpg';
-const path = require("path");
-const mime = require("mime-types");
-const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
-const body = fs.createReadStream(pathToUpload); // {fs.ReadStream} read the file
-const contentType = mime.lookup(fileName);
-
-try {
-  const response = await xero.accountingApi.updateBankTransferAttachmentByFileName(xeroTenantId, bankTransferID, fileName, body, {
-    headers: {
-      "Content-Type": contentType,
-    }
-  });
-  console.log(response.body || response.response.statusCode)
-} catch (err) {
-  const error = JSON.stringify(err.response.body, null, 2)
-  console.log(`Status Code: ${err.response.statusCode} => ${error}`);
-}</code></pre>
-                    </div>
-                  </div>
-                  <h2>Scopes</h2>
-                  <table>
-                    
-                    <tr>
-                      <td>accounting.attachments</td>
-                      <td>Grant read-write access to attachments</td>
-                    </tr>
-                    
-                  </table>
-                  <h2>Parameters</h2>
-                  <div class="methodsubtabletitle">Path parameters</div>
-                  <table id="methodsubtable">
-                    <tr>
-                      <th width="150px">Name</th>
-                      <th>Description</th>
-                    </tr>
-                    <tr><td style="width:150px;">BankTransferID<span style="color:red;">*</span></td>
-<td>
-
-
-    <div id="d2e199_updateBankTransferAttachmentByFileName_bankTransferID">
-        <div class="json-schema-view">
-            <div class="primitive">
-                <span class="type">
-                    UUID
-                </span>
-                    <span class="format">
-                        (uuid)
-                    </span>
-
-                    <div class="inner description marked">
-Xero generated unique identifier for a bank transfer
-                    </div>
-            </div>
-                <div class="inner required">
-                    Required
-                </div>
-        </div>
-    </div>
-</td>
-</tr>
-
-                    <tr><td style="width:150px;">FileName<span style="color:red;">*</span></td>
-<td>
-
-
-    <div id="d2e199_updateBankTransferAttachmentByFileName_fileName">
+    <div id="d2e199_updateBankTransferAttachmentByFileName_idempotencyKey">
         <div class="json-schema-view">
             <div class="primitive">
                 <span class="type">
@@ -36639,42 +38506,9 @@ <h2>Parameters</h2>
                 </span>
 
                     <div class="inner description marked">
-Name of the attachment
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
                     </div>
             </div>
-                <div class="inner required">
-                    Required
-                </div>
-        </div>
-    </div>
-</td>
-</tr>
-
-                  </table>
-                  <div class="methodsubtabletitle">Header parameters</div>
-                  <table id="methodsubtable">
-                    <tr>
-                      <th width="150px">Name</th>
-                      <th>Description</th>
-                    </tr>
-                    <tr><td style="width:150px;">xero-tenant-id<span style="color:red;">*</span></td>
-<td>
-
-
-    <div id="d2e199_updateBankTransferAttachmentByFileName_xeroTenantId">
-        <div class="json-schema-view">
-            <div class="primitive">
-                <span class="type">
-                    String
-                </span>
-
-                    <div class="inner description marked">
-Xero identifier for Tenant
-                    </div>
-            </div>
-                <div class="inner required">
-                    Required
-                </div>
         </div>
     </div>
 </td>
@@ -36748,6 +38582,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const contactID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const contact: Contact = { 
   name: "Thanos",
@@ -36759,7 +38594,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateContact(xeroTenantId, contactID, contacts);
+  const response = await xero.accountingApi.updateContact(xeroTenantId, contactID, contacts, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -36837,6 +38672,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateContact_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -36908,6 +38763,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const contactID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -36915,7 +38771,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.updateContactAttachmentByFileName(xeroTenantId, contactID, fileName, body, {
+  const response = await xero.accountingApi.updateContactAttachmentByFileName(xeroTenantId, contactID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -37020,6 +38876,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateContactAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -37090,6 +38966,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const contactGroupID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const contactGroup: ContactGroup = { 
   name: "Vendor"
@@ -37100,7 +38977,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateContactGroup(xeroTenantId, contactGroupID, contactGroups);
+  const response = await xero.accountingApi.updateContactGroup(xeroTenantId, contactGroupID, contactGroups, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -37178,6 +39055,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateContactGroup_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -37248,6 +39145,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const creditNoteID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 const unitdp = 4;
 const currDate = '2020-12-10'
 
@@ -37278,7 +39176,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateCreditNote(xeroTenantId, creditNoteID, creditNotes,  unitdp);
+  const response = await xero.accountingApi.updateCreditNote(xeroTenantId, creditNoteID, creditNotes, idempotencyKey, unitdp);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -37356,6 +39254,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateCreditNote_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -37454,6 +39372,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const creditNoteID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -37461,7 +39380,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.updateCreditNoteAttachmentByFileName(xeroTenantId, creditNoteID, fileName, body, {
+  const response = await xero.accountingApi.updateCreditNoteAttachmentByFileName(xeroTenantId, creditNoteID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -37566,6 +39485,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateCreditNoteAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -37636,6 +39575,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const expenseClaimID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 const currDate = '2020-12-10'
 
 const user: User = { 
@@ -37660,7 +39600,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateExpenseClaim(xeroTenantId, expenseClaimID, expenseClaims);
+  const response = await xero.accountingApi.updateExpenseClaim(xeroTenantId, expenseClaimID, expenseClaims, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -37738,6 +39678,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateExpenseClaim_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -37807,6 +39767,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const invoiceID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 const unitdp = 4;
 
 const invoice: Invoice = { 
@@ -37818,7 +39779,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateInvoice(xeroTenantId, invoiceID, invoices,  unitdp);
+  const response = await xero.accountingApi.updateInvoice(xeroTenantId, invoiceID, invoices, idempotencyKey, unitdp);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -37896,6 +39857,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateInvoice_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -37993,6 +39974,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const invoiceID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -38000,7 +39982,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.updateInvoiceAttachmentByFileName(xeroTenantId, invoiceID, fileName, body, {
+  const response = await xero.accountingApi.updateInvoiceAttachmentByFileName(xeroTenantId, invoiceID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -38105,6 +40087,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateInvoiceAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -38175,6 +40177,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const itemID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 const unitdp = 4;
 
 const item: Item = { 
@@ -38187,7 +40190,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateItem(xeroTenantId, itemID, items,  unitdp);
+  const response = await xero.accountingApi.updateItem(xeroTenantId, itemID, items, idempotencyKey, unitdp);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -38265,6 +40268,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateItem_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -38361,6 +40384,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const linkedTransactionID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const linkedTransaction: LinkedTransaction = { 
   sourceLineItemID: "00000000-0000-0000-0000-000000000000",
@@ -38372,7 +40396,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateLinkedTransaction(xeroTenantId, linkedTransactionID, linkedTransactions);
+  const response = await xero.accountingApi.updateLinkedTransaction(xeroTenantId, linkedTransactionID, linkedTransactions, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -38450,6 +40474,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateLinkedTransaction_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -38519,6 +40563,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const manualJournalID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 const dateValue = '2020-10-10'  
 const manualJournalLines = [];
 
@@ -38547,7 +40592,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateManualJournal(xeroTenantId, manualJournalID, manualJournals);
+  const response = await xero.accountingApi.updateManualJournal(xeroTenantId, manualJournalID, manualJournals, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -38625,6 +40670,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateManualJournal_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -38695,6 +40760,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const manualJournalID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -38702,7 +40768,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.updateManualJournalAttachmentByFileName(xeroTenantId, manualJournalID, fileName, body, {
+  const response = await xero.accountingApi.updateManualJournalAttachmentByFileName(xeroTenantId, manualJournalID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -38807,6 +40873,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateManualJournalAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -38876,6 +40962,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const unitdp = 4;
 
@@ -38908,7 +40995,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateOrCreateBankTransactions(xeroTenantId, bankTransactions,  summarizeErrors, unitdp);
+  const response = await xero.accountingApi.updateOrCreateBankTransactions(xeroTenantId, bankTransactions, idempotencyKey, summarizeErrors, unitdp);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -38953,6 +41040,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateOrCreateBankTransactions_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -39068,6 +41175,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 
 const phone: Phone = { 
@@ -39088,7 +41196,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateOrCreateContacts(xeroTenantId, contacts,  summarizeErrors);
+  const response = await xero.accountingApi.updateOrCreateContacts(xeroTenantId, contacts, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -39133,6 +41241,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateOrCreateContacts_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -39228,6 +41356,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const unitdp = 4;
 const currDate = '2020-12-10'
@@ -39257,7 +41386,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateOrCreateCreditNotes(xeroTenantId, creditNotes,  summarizeErrors, unitdp);
+  const response = await xero.accountingApi.updateOrCreateCreditNotes(xeroTenantId, creditNotes, idempotencyKey, summarizeErrors, unitdp);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -39302,6 +41431,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateOrCreateCreditNotes_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -39418,6 +41567,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 
 const employee: Employee = { 
@@ -39430,7 +41580,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateOrCreateEmployees(xeroTenantId, employees,  summarizeErrors);
+  const response = await xero.accountingApi.updateOrCreateEmployees(xeroTenantId, employees, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -39475,6 +41625,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateOrCreateEmployees_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -39571,6 +41741,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const unitdp = 4;
 const dateValue = '2020-10-10'
@@ -39604,7 +41775,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateOrCreateInvoices(xeroTenantId, invoices,  summarizeErrors, unitdp);
+  const response = await xero.accountingApi.updateOrCreateInvoices(xeroTenantId, invoices, idempotencyKey, summarizeErrors, unitdp);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -39649,6 +41820,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateOrCreateInvoices_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -39764,6 +41955,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const unitdp = 4;
 
@@ -39778,7 +41970,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateOrCreateItems(xeroTenantId, items,  summarizeErrors, unitdp);
+  const response = await xero.accountingApi.updateOrCreateItems(xeroTenantId, items, idempotencyKey, summarizeErrors, unitdp);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -39823,6 +42015,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateOrCreateItems_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -39938,6 +42150,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const dateValue = '2020-10-10'  
 const manualJournalLines = [];
@@ -39967,7 +42180,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateOrCreateManualJournals(xeroTenantId, manualJournals,  summarizeErrors);
+  const response = await xero.accountingApi.updateOrCreateManualJournals(xeroTenantId, manualJournals, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -40012,6 +42225,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateOrCreateManualJournals_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -40108,6 +42341,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const dateValue = '2020-10-10'
 
@@ -40135,7 +42369,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateOrCreatePurchaseOrders(xeroTenantId, purchaseOrders,  summarizeErrors);
+  const response = await xero.accountingApi.updateOrCreatePurchaseOrders(xeroTenantId, purchaseOrders, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -40180,6 +42414,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateOrCreatePurchaseOrders_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -40275,6 +42529,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 const dateValue = '2020-10-10'
 
@@ -40302,7 +42557,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateOrCreateQuotes(xeroTenantId, quotes,  summarizeErrors);
+  const response = await xero.accountingApi.updateOrCreateQuotes(xeroTenantId, quotes, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -40347,6 +42602,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateOrCreateQuotes_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -40442,10 +42717,11 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 const summarizeErrors = true;
 
 try {
-  const response = await xero.accountingApi.updateOrCreateRepeatingInvoices(xeroTenantId, repeatingInvoices,  summarizeErrors);
+  const response = await xero.accountingApi.updateOrCreateRepeatingInvoices(xeroTenantId, repeatingInvoices, idempotencyKey, summarizeErrors);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -40490,6 +42766,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateOrCreateRepeatingInvoices_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -40587,6 +42883,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const purchaseOrderID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const purchaseOrder: PurchaseOrder = { 
   attentionTo: "Peter Parker"
@@ -40597,7 +42894,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updatePurchaseOrder(xeroTenantId, purchaseOrderID, purchaseOrders);
+  const response = await xero.accountingApi.updatePurchaseOrder(xeroTenantId, purchaseOrderID, purchaseOrders, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -40675,6 +42972,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updatePurchaseOrder_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -40745,6 +43062,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const purchaseOrderID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -40752,7 +43070,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.updatePurchaseOrderAttachmentByFileName(xeroTenantId, purchaseOrderID, fileName, body, {
+  const response = await xero.accountingApi.updatePurchaseOrderAttachmentByFileName(xeroTenantId, purchaseOrderID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -40857,6 +43175,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updatePurchaseOrderAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -40927,6 +43265,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const quoteID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 const dateValue = '2020-10-10'
 
 const contact: Contact = { 
@@ -40944,7 +43283,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateQuote(xeroTenantId, quoteID, quotes);
+  const response = await xero.accountingApi.updateQuote(xeroTenantId, quoteID, quotes, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -41022,6 +43361,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateQuote_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -41092,6 +43451,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const quoteID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -41099,7 +43459,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.updateQuoteAttachmentByFileName(xeroTenantId, quoteID, fileName, body, {
+  const response = await xero.accountingApi.updateQuoteAttachmentByFileName(xeroTenantId, quoteID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -41204,6 +43564,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateQuoteAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -41274,6 +43654,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const receiptID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 const unitdp = 4;
 const dateValue = '2020-10-10'
 
@@ -41292,7 +43673,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateReceipt(xeroTenantId, receiptID, receipts,  unitdp);
+  const response = await xero.accountingApi.updateReceipt(xeroTenantId, receiptID, receipts, idempotencyKey, unitdp);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -41342,18 +43723,218 @@ <h2>Parameters</h2>
 </td>
 </tr>
 
-                  </table>
-                  <div class="methodsubtabletitle">Header parameters</div>
-                  <table id="methodsubtable">
-                    <tr>
-                      <th width="150px">Name</th>
-                      <th>Description</th>
-                    </tr>
-                    <tr><td style="width:150px;">xero-tenant-id<span style="color:red;">*</span></td>
+                  </table>
+                  <div class="methodsubtabletitle">Header parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">xero-tenant-id<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_updateReceipt_xeroTenantId">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+Xero identifier for Tenant
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateReceipt_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                  </table>
+                  <div class="methodsubtabletitle">Body parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">receipts <span style="color:red;">*</span></td>
+<td>
+<div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    Receipts
+                </span>
+
+                    <div class="inner description marked">
+
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+<script type="application/ld+json">
+    {
+  "content" : {
+    "application/json" : {
+      "schema" : {
+        "$ref" : "#/components/schemas/Receipts"
+      },
+      "example" : "{ \"Receipts\": [ { \"Lineitems\": [], \"User\": { \"UserID\": \"00000000-0000-0000-0000-000000000000\" }, \"Reference\": \"Foobar\" } ] }"
+    }
+  },
+  "required" : true
+}
+</script>
+                  </table>
+                  <div class="methodsubtabletitle">Query parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">unitdp</td>
+<td>
+
+
+    <div id="d2e199_updateReceipt_unitdp">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    Integer
+                </span>
+
+                    <div class="inner description marked">
+e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                  </table>
+                </article>
+              </div>
+              <hr>
+              <div id="api-Accounting-updateReceiptAttachmentByFileName">
+                <article id="api-Accounting-updateReceiptAttachmentByFileName-0" data-group="User" data-name="updateReceiptAttachmentByFileName" data-version="0">
+                  <div class="pull-left">
+                    <h1>updateReceiptAttachmentByFileName</h1>
+                    <p>Updates a specific attachment on a specific expense claim receipts by file name</p>
+                  </div>
+                  <div class="pull-right"></div>
+                  <div class="clearfix"></div>
+                  <p></p>
+                  <p class="marked"></p>
+                  <p></p>
+                  <br />
+                  <pre class="prettyprint language-html prettyprinted" data-type="post"><code><span class="pln">/Receipts/{ReceiptID}/Attachments/{FileName}</span></code></pre>
+                  <p>
+                  <h3>Usage and SDK Samples</h3>
+                  </p>
+                  <ul class="nav nav-tabs nav-tabs-examples">
+                    <!-- *****REPLACE***** comment out the other languages <li> -->
+                    <li class=""><a href="#examples-Accounting-updateReceiptAttachmentByFileName-0-javascript">Node</a></li>
+                  </ul>
+                  <div class="tab-content">
+                    <!-- *****REPLACE***** comment out the other languages tab-pane -->
+                    <div class="tab-pane" id="examples-Accounting-updateReceiptAttachmentByFileName-0-javascript">
+                      <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
+
+const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const receiptID = '00000000-0000-0000-0000-000000000000';
+const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
+const path = require("path");
+const mime = require("mime-types");
+const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
+const body = fs.createReadStream(pathToUpload); // {fs.ReadStream} read the file
+const contentType = mime.lookup(fileName);
+
+try {
+  const response = await xero.accountingApi.updateReceiptAttachmentByFileName(xeroTenantId, receiptID, fileName, body, idempotencyKey, {
+    headers: {
+      "Content-Type": contentType,
+    }
+  });
+  console.log(response.body || response.response.statusCode)
+} catch (err) {
+  const error = JSON.stringify(err.response.body, null, 2)
+  console.log(`Status Code: ${err.response.statusCode} => ${error}`);
+}</code></pre>
+                    </div>
+                  </div>
+                  <h2>Scopes</h2>
+                  <table>
+                    
+                    <tr>
+                      <td>accounting.attachments</td>
+                      <td>Grant read-write access to attachments</td>
+                    </tr>
+                    
+                  </table>
+                  <h2>Parameters</h2>
+                  <div class="methodsubtabletitle">Path parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">ReceiptID<span style="color:red;">*</span></td>
+<td>
+
+
+    <div id="d2e199_updateReceiptAttachmentByFileName_receiptID">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    UUID
+                </span>
+                    <span class="format">
+                        (uuid)
+                    </span>
+
+                    <div class="inner description marked">
+Unique identifier for a Receipt
+                    </div>
+            </div>
+                <div class="inner required">
+                    Required
+                </div>
+        </div>
+    </div>
+</td>
+</tr>
+
+                    <tr><td style="width:150px;">FileName<span style="color:red;">*</span></td>
 <td>
 
 
-    <div id="d2e199_updateReceipt_xeroTenantId">
+    <div id="d2e199_updateReceiptAttachmentByFileName_fileName">
         <div class="json-schema-view">
             <div class="primitive">
                 <span class="type">
@@ -41361,178 +43942,29 @@ <h2>Parameters</h2>
                 </span>
 
                     <div class="inner description marked">
-Xero identifier for Tenant
-                    </div>
-            </div>
-                <div class="inner required">
-                    Required
-                </div>
-        </div>
-    </div>
-</td>
-</tr>
-
-                  </table>
-                  <div class="methodsubtabletitle">Body parameters</div>
-                  <table id="methodsubtable">
-                    <tr>
-                      <th width="150px">Name</th>
-                      <th>Description</th>
-                    </tr>
-                    <tr><td style="width:150px;">receipts <span style="color:red;">*</span></td>
-<td>
-<div class="json-schema-view">
-            <div class="primitive">
-                <span class="type">
-                    Receipts
-                </span>
-
-                    <div class="inner description marked">
-
+Name of the attachment
                     </div>
             </div>
                 <div class="inner required">
                     Required
                 </div>
         </div>
-<script type="application/ld+json">
-    {
-  "content" : {
-    "application/json" : {
-      "schema" : {
-        "$ref" : "#/components/schemas/Receipts"
-      },
-      "example" : "{ \"Receipts\": [ { \"Lineitems\": [], \"User\": { \"UserID\": \"00000000-0000-0000-0000-000000000000\" }, \"Reference\": \"Foobar\" } ] }"
-    }
-  },
-  "required" : true
-}
-</script>
-                  </table>
-                  <div class="methodsubtabletitle">Query parameters</div>
-                  <table id="methodsubtable">
-                    <tr>
-                      <th width="150px">Name</th>
-                      <th>Description</th>
-                    </tr>
-                    <tr><td style="width:150px;">unitdp</td>
-<td>
-
-
-    <div id="d2e199_updateReceipt_unitdp">
-        <div class="json-schema-view">
-            <div class="primitive">
-                <span class="type">
-                    Integer
-                </span>
-
-                    <div class="inner description marked">
-e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
-                    </div>
-            </div>
-        </div>
     </div>
 </td>
 </tr>
 
                   </table>
-                </article>
-              </div>
-              <hr>
-              <div id="api-Accounting-updateReceiptAttachmentByFileName">
-                <article id="api-Accounting-updateReceiptAttachmentByFileName-0" data-group="User" data-name="updateReceiptAttachmentByFileName" data-version="0">
-                  <div class="pull-left">
-                    <h1>updateReceiptAttachmentByFileName</h1>
-                    <p>Updates a specific attachment on a specific expense claim receipts by file name</p>
-                  </div>
-                  <div class="pull-right"></div>
-                  <div class="clearfix"></div>
-                  <p></p>
-                  <p class="marked"></p>
-                  <p></p>
-                  <br />
-                  <pre class="prettyprint language-html prettyprinted" data-type="post"><code><span class="pln">/Receipts/{ReceiptID}/Attachments/{FileName}</span></code></pre>
-                  <p>
-                  <h3>Usage and SDK Samples</h3>
-                  </p>
-                  <ul class="nav nav-tabs nav-tabs-examples">
-                    <!-- *****REPLACE***** comment out the other languages <li> -->
-                    <li class=""><a href="#examples-Accounting-updateReceiptAttachmentByFileName-0-javascript">Node</a></li>
-                  </ul>
-                  <div class="tab-content">
-                    <!-- *****REPLACE***** comment out the other languages tab-pane -->
-                    <div class="tab-pane" id="examples-Accounting-updateReceiptAttachmentByFileName-0-javascript">
-                      <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
-
-const xeroTenantId = 'YOUR_XERO_TENANT_ID';
-const receiptID = '00000000-0000-0000-0000-000000000000';
-const fileName = 'xero-dev.jpg';
-const path = require("path");
-const mime = require("mime-types");
-const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
-const body = fs.createReadStream(pathToUpload); // {fs.ReadStream} read the file
-const contentType = mime.lookup(fileName);
-
-try {
-  const response = await xero.accountingApi.updateReceiptAttachmentByFileName(xeroTenantId, receiptID, fileName, body, {
-    headers: {
-      "Content-Type": contentType,
-    }
-  });
-  console.log(response.body || response.response.statusCode)
-} catch (err) {
-  const error = JSON.stringify(err.response.body, null, 2)
-  console.log(`Status Code: ${err.response.statusCode} => ${error}`);
-}</code></pre>
-                    </div>
-                  </div>
-                  <h2>Scopes</h2>
-                  <table>
-                    
-                    <tr>
-                      <td>accounting.attachments</td>
-                      <td>Grant read-write access to attachments</td>
-                    </tr>
-                    
-                  </table>
-                  <h2>Parameters</h2>
-                  <div class="methodsubtabletitle">Path parameters</div>
+                  <div class="methodsubtabletitle">Header parameters</div>
                   <table id="methodsubtable">
                     <tr>
                       <th width="150px">Name</th>
                       <th>Description</th>
                     </tr>
-                    <tr><td style="width:150px;">ReceiptID<span style="color:red;">*</span></td>
-<td>
-
-
-    <div id="d2e199_updateReceiptAttachmentByFileName_receiptID">
-        <div class="json-schema-view">
-            <div class="primitive">
-                <span class="type">
-                    UUID
-                </span>
-                    <span class="format">
-                        (uuid)
-                    </span>
-
-                    <div class="inner description marked">
-Unique identifier for a Receipt
-                    </div>
-            </div>
-                <div class="inner required">
-                    Required
-                </div>
-        </div>
-    </div>
-</td>
-</tr>
-
-                    <tr><td style="width:150px;">FileName<span style="color:red;">*</span></td>
+                    <tr><td style="width:150px;">xero-tenant-id<span style="color:red;">*</span></td>
 <td>
 
 
-    <div id="d2e199_updateReceiptAttachmentByFileName_fileName">
+    <div id="d2e199_updateReceiptAttachmentByFileName_xeroTenantId">
         <div class="json-schema-view">
             <div class="primitive">
                 <span class="type">
@@ -41540,7 +43972,7 @@ <h2>Parameters</h2>
                 </span>
 
                     <div class="inner description marked">
-Name of the attachment
+Xero identifier for Tenant
                     </div>
             </div>
                 <div class="inner required">
@@ -41551,18 +43983,11 @@ <h2>Parameters</h2>
 </td>
 </tr>
 
-                  </table>
-                  <div class="methodsubtabletitle">Header parameters</div>
-                  <table id="methodsubtable">
-                    <tr>
-                      <th width="150px">Name</th>
-                      <th>Description</th>
-                    </tr>
-                    <tr><td style="width:150px;">xero-tenant-id<span style="color:red;">*</span></td>
+                    <tr><td style="width:150px;">Idempotency-Key</td>
 <td>
 
 
-    <div id="d2e199_updateReceiptAttachmentByFileName_xeroTenantId">
+    <div id="d2e199_updateReceiptAttachmentByFileName_idempotencyKey">
         <div class="json-schema-view">
             <div class="primitive">
                 <span class="type">
@@ -41570,12 +43995,9 @@ <h2>Parameters</h2>
                 </span>
 
                     <div class="inner description marked">
-Xero identifier for Tenant
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
                     </div>
             </div>
-                <div class="inner required">
-                    Required
-                </div>
         </div>
     </div>
 </td>
@@ -41649,9 +44071,10 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const repeatingInvoiceID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.updateRepeatingInvoice(xeroTenantId, repeatingInvoiceID, repeatingInvoices);
+  const response = await xero.accountingApi.updateRepeatingInvoice(xeroTenantId, repeatingInvoiceID, repeatingInvoices, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -41729,6 +44152,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateRepeatingInvoice_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -41799,6 +44242,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const repeatingInvoiceID = '00000000-0000-0000-0000-000000000000';
 const fileName = 'xero-dev.jpg';
+const idempotencyKey = 'KEY_VALUE';
 const path = require("path");
 const mime = require("mime-types");
 const pathToUpload = path.resolve(__dirname, "../public/images/xero-dev.jpg"); // determine the path to your file
@@ -41806,7 +44250,7 @@ <h3>Usage and SDK Samples</h3>
 const contentType = mime.lookup(fileName);
 
 try {
-  const response = await xero.accountingApi.updateRepeatingInvoiceAttachmentByFileName(xeroTenantId, repeatingInvoiceID, fileName, body, {
+  const response = await xero.accountingApi.updateRepeatingInvoiceAttachmentByFileName(xeroTenantId, repeatingInvoiceID, fileName, body, idempotencyKey, {
     headers: {
       "Content-Type": contentType,
     }
@@ -41911,6 +44355,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateRepeatingInvoiceAttachmentByFileName_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -41980,6 +44444,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 
 const taxComponent: TaxComponent = { 
   name: "State Tax",
@@ -41997,7 +44462,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateTaxRate(xeroTenantId, taxRates);
+  const response = await xero.accountingApi.updateTaxRate(xeroTenantId, taxRates, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -42042,6 +44507,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateTaxRate_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -42111,13 +44596,14 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const trackingCategoryID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const trackingCategory: TrackingCategory = { 
   name: "Foobar"
 }; 
 
 try {
-  const response = await xero.accountingApi.updateTrackingCategory(xeroTenantId, trackingCategoryID, trackingCategory);
+  const response = await xero.accountingApi.updateTrackingCategory(xeroTenantId, trackingCategoryID, trackingCategory, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -42195,6 +44681,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateTrackingCategory_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -42265,13 +44771,14 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const trackingCategoryID = '00000000-0000-0000-0000-000000000000';
 const trackingOptionID = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 const trackingOption: TrackingOption = { 
   name: "Foobar"
 }; 
 
 try {
-  const response = await xero.accountingApi.updateTrackingOptions(xeroTenantId, trackingCategoryID, trackingOptionID, trackingOption);
+  const response = await xero.accountingApi.updateTrackingOptions(xeroTenantId, trackingCategoryID, trackingOptionID, trackingOption, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -42375,6 +44882,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateTrackingOptions_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
diff --git a/docs/appstore/index.html b/docs/appstore/index.html
index fc5d37574..05ee58637 100644
--- a/docs/appstore/index.html
+++ b/docs/appstore/index.html
@@ -1242,7 +1242,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="AppStore"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="AppStore"><strong>VSN: </strong>4.35.0</li>
+              <li class="nav-header" data-group="AppStore"><strong>VSN: </strong>4.36.0</li>
               <li class="nav-header" data-group="AppStore"><a href="#api-AppStore">Methods</a></li>
               <li data-group="AppStore" data-name="getSubscription" class="">
                 <a href="#api-AppStore-getSubscription">getSubscription</a>
@@ -1465,9 +1465,10 @@ <h3>Usage and SDK Samples</h3>
 
 const subscriptionId = '00000000-0000-0000-0000-000000000000';
 const subscriptionItemId = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.postUsageRecords(subscriptionId, subscriptionItemId, createUsageRecord);
+  const response = await xero.accountingApi.postUsageRecords(subscriptionId, subscriptionItemId, createUsageRecord, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -1541,6 +1542,33 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                  </table>
+                  <div class="methodsubtabletitle">Header parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_postUsageRecords_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -1612,9 +1640,10 @@ <h3>Usage and SDK Samples</h3>
 const subscriptionId = '00000000-0000-0000-0000-000000000000';
 const subscriptionItemId = '00000000-0000-0000-0000-000000000000';
 const usageRecordId = '00000000-0000-0000-0000-000000000000';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.putUsageRecords(subscriptionId, subscriptionItemId, usageRecordId, updateUsageRecord);
+  const response = await xero.accountingApi.putUsageRecords(subscriptionId, subscriptionItemId, usageRecordId, updateUsageRecord, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -1714,6 +1743,33 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                  </table>
+                  <div class="methodsubtabletitle">Header parameters</div>
+                  <table id="methodsubtable">
+                    <tr>
+                      <th width="150px">Name</th>
+                      <th>Description</th>
+                    </tr>
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_putUsageRecords_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
diff --git a/docs/assets/index.html b/docs/assets/index.html
index 2cac921db..2699d18c7 100644
--- a/docs/assets/index.html
+++ b/docs/assets/index.html
@@ -1393,7 +1393,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Asset"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Asset"><strong>VSN: </strong>4.35.0</li>
+              <li class="nav-header" data-group="Asset"><strong>VSN: </strong>4.36.0</li>
               <li class="nav-header" data-group="Asset"><a href="#api-Asset">Methods</a></li>
               <li data-group="Asset" data-name="createAsset" class="">
                 <a href="#api-Asset-createAsset">createAsset</a>
@@ -1457,6 +1457,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 
 const asset: Asset = { 
   assetname: "Other Computer",
@@ -1465,7 +1466,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createAsset(xeroTenantId, asset);
+  const response = await xero.accountingApi.createAsset(xeroTenantId, asset, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -1510,6 +1511,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createAsset_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -1579,6 +1600,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 
 const bookDepreciationSetting: BookDepreciationSetting = { 
   depreciationMethod: "DiminishingValue100",
@@ -1596,7 +1618,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createAssetType(xeroTenantId,  assetType);
+  const response = await xero.accountingApi.createAssetType(xeroTenantId, idempotencyKey, assetType);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -1641,6 +1663,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createAssetType_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
diff --git a/docs/bankfeeds/index.html b/docs/bankfeeds/index.html
index de9060c1f..440bbbdd3 100644
--- a/docs/bankfeeds/index.html
+++ b/docs/bankfeeds/index.html
@@ -1269,7 +1269,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="BankFeeds"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="BankFeeds"><strong>VSN: </strong>4.35.0</li>
+              <li class="nav-header" data-group="BankFeeds"><strong>VSN: </strong>4.36.0</li>
               <li class="nav-header" data-group="BankFeeds"><a href="#api-BankFeeds">Methods</a></li>
               <li data-group="BankFeeds" data-name="createFeedConnections" class="">
                 <a href="#api-BankFeeds-createFeedConnections">createFeedConnections</a>
@@ -1336,9 +1336,10 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.createFeedConnections(xeroTenantId, feedConnections);
+  const response = await xero.accountingApi.createFeedConnections(xeroTenantId, feedConnections, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -1383,6 +1384,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createFeedConnections_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -1460,9 +1481,10 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.createStatements(xeroTenantId,  statements);
+  const response = await xero.accountingApi.createStatements(xeroTenantId, idempotencyKey, statements);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -1507,6 +1529,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createStatements_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -1620,9 +1662,10 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.deleteFeedConnections(xeroTenantId, feedConnections);
+  const response = await xero.accountingApi.deleteFeedConnections(xeroTenantId, feedConnections, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -1667,6 +1710,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_deleteFeedConnections_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
diff --git a/docs/files/index.html b/docs/files/index.html
index 4838a5781..671f9d3e5 100644
--- a/docs/files/index.html
+++ b/docs/files/index.html
@@ -1156,7 +1156,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Files"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Files"><strong>VSN: </strong>4.35.0</li>
+              <li class="nav-header" data-group="Files"><strong>VSN: </strong>4.36.0</li>
               <li class="nav-header" data-group="Files"><a href="#api-Files">Methods</a></li>
               <li data-group="Files" data-name="createFileAssociation" class="">
                 <a href="#api-Files-createFileAssociation">createFileAssociation</a>
@@ -1257,9 +1257,10 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const fileId = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.createFileAssociation(xeroTenantId, fileId,  association);
+  const response = await xero.accountingApi.createFileAssociation(xeroTenantId, fileId, idempotencyKey, association);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -1337,6 +1338,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createFileAssociation_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -1401,9 +1422,10 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.createFolder(xeroTenantId,  folder);
+  const response = await xero.accountingApi.createFolder(xeroTenantId, idempotencyKey, folder);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -1448,6 +1470,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createFolder_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -2937,9 +2979,10 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const fileId = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.updateFile(xeroTenantId, fileId,  fileObject);
+  const response = await xero.accountingApi.updateFile(xeroTenantId, fileId, idempotencyKey, fileObject);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -3017,6 +3060,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateFile_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -3082,9 +3145,10 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'YOUR_XERO_TENANT_ID';
 const folderId = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.updateFolder(xeroTenantId, folderId, folder);
+  const response = await xero.accountingApi.updateFolder(xeroTenantId, folderId, folder, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -3162,6 +3226,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateFolder_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -3233,10 +3317,11 @@ <h3>Usage and SDK Samples</h3>
 const body = BYTE_ARRAY_DATA_HERE;
 const name = 'name_example';
 const filename = 'filename_example';
+const idempotencyKey = 'KEY_VALUE';
 const mimeType = 'mimeType_example';
 
 try {
-  const response = await xero.accountingApi.uploadFile(xeroTenantId, body, name, filename,  mimeType, {
+  const response = await xero.accountingApi.uploadFile(xeroTenantId, body, name, filename, idempotencyKey, mimeType, {
     headers: {
       "Content-Type": contentType,
     }
@@ -3285,6 +3370,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_uploadFile_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -3420,10 +3525,11 @@ <h3>Usage and SDK Samples</h3>
 const body = BYTE_ARRAY_DATA_HERE;
 const name = 'name_example';
 const filename = 'filename_example';
+const idempotencyKey = 'KEY_VALUE';
 const mimeType = 'mimeType_example';
 
 try {
-  const response = await xero.accountingApi.uploadFileToFolder(xeroTenantId, folderId, body, name, filename,  mimeType, {
+  const response = await xero.accountingApi.uploadFileToFolder(xeroTenantId, folderId, body, name, filename, idempotencyKey, mimeType, {
     headers: {
       "Content-Type": contentType,
     }
@@ -3505,6 +3611,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_uploadFileToFolder_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
diff --git a/docs/finance/index.html b/docs/finance/index.html
index 8ab9f98db..5f0959925 100644
--- a/docs/finance/index.html
+++ b/docs/finance/index.html
@@ -2052,7 +2052,7 @@
   "title" : "",
   "type" : "string",
   "description" : "",
-  "enum" : [ "NotSet", "bank-account-not-found", "internal-error", "invalid-application", "invalid-request", "organisation-not-found", "organisation-offline", "request-timeout", "service-unavailable", "unauthorized" ]
+  "enum" : [ "NotSet", "bank-account-not-found", "internal-error", "invalid-application", "invalid-request", "organisation-not-found", "organisation-offline", "request-timeout", "service-unavailable", "unauthorized", "rate-limit-error" ]
 };
       defs["ProfitAndLossResponse"] = {
   "title" : "",
@@ -2735,7 +2735,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Finance"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Finance"><strong>VSN: </strong>4.35.0</li>
+              <li class="nav-header" data-group="Finance"><strong>VSN: </strong>4.36.0</li>
               <li class="nav-header" data-group="Finance"><a href="#api-Finance">Methods</a></li>
               <li data-group="Finance" data-name="getAccountingActivityAccountUsage" class="">
                 <a href="#api-Finance-getAccountingActivityAccountUsage">getAccountingActivityAccountUsage</a>
diff --git a/docs/payroll-au/index.html b/docs/payroll-au/index.html
index e23944551..90b1b6060 100644
--- a/docs/payroll-au/index.html
+++ b/docs/payroll-au/index.html
@@ -1813,7 +1813,7 @@
   "title" : "",
   "type" : "string",
   "description" : "",
-  "enum" : [ "SCHEDULED", "PROCESSED" ]
+  "enum" : [ "SCHEDULED", "PROCESSED", "REQUESTED", "REJECTED" ]
 };
       defs["LeaveType"] = {
   "title" : "",
@@ -3413,7 +3413,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="PayrollAu"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="PayrollAu"><strong>VSN: </strong>4.35.0</li>
+              <li class="nav-header" data-group="PayrollAu"><strong>VSN: </strong>4.36.0</li>
               <li class="nav-header" data-group="PayrollAu"><a href="#api-PayrollAu">Methods</a></li>
               <li data-group="PayrollAu" data-name="approveLeaveApplication" class="">
                 <a href="#api-PayrollAu-approveLeaveApplication">approveLeaveApplication</a>
@@ -3556,9 +3556,10 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const leaveApplicationID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.approveLeaveApplication(xeroTenantId, leaveApplicationID);
+  const response = await xero.accountingApi.approveLeaveApplication(xeroTenantId, leaveApplicationID, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -3636,6 +3637,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_approveLeaveApplication_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -3668,6 +3689,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 const dateOfBirth = '2000-10-28'
 
 const homeAddress: HomeAddress = { 
@@ -3685,7 +3707,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployee(xeroTenantId, employee);
+  const response = await xero.accountingApi.createEmployee(xeroTenantId, employee, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -3730,6 +3752,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployee_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -3801,6 +3843,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-28'
 const endDate = '2020-10-30'
 
@@ -3813,7 +3856,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createLeaveApplication(xeroTenantId, leaveApplication);
+  const response = await xero.accountingApi.createLeaveApplication(xeroTenantId, leaveApplication, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -3858,6 +3901,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createLeaveApplication_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -3929,6 +3992,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 const earningsRate: EarningsRate = { 
   name: "Ordinary Hours 123",
@@ -3973,7 +4037,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createPayItem(xeroTenantId, payItem);
+  const response = await xero.accountingApi.createPayItem(xeroTenantId, payItem, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4018,6 +4082,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createPayItem_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4086,13 +4170,14 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 const payRun: PayRun = { 
   payrollCalendarID: "00000000-0000-0000-0000-000000000000"
 }; 
 
 try {
-  const response = await xero.accountingApi.createPayRun(xeroTenantId, payRun);
+  const response = await xero.accountingApi.createPayRun(xeroTenantId, payRun, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4137,6 +4222,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createPayRun_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4208,6 +4313,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2000-10-28'
 const paymentDate = '2000-10-30'
 
@@ -4221,7 +4327,7 @@ <h3>Usage and SDK Samples</h3>
 payrollCalendars.push(payrollCalendar)
 
 try {
-  const response = await xero.accountingApi.createPayrollCalendar(xeroTenantId, payrollCalendar);
+  const response = await xero.accountingApi.createPayrollCalendar(xeroTenantId, payrollCalendar, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4266,6 +4372,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createPayrollCalendar_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4337,6 +4463,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 const superFund: SuperFund = { 
   type: SuperFundType.REGULATED,
@@ -4344,7 +4471,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createSuperfund(xeroTenantId, superFund);
+  const response = await xero.accountingApi.createSuperfund(xeroTenantId, superFund, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4389,6 +4516,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createSuperfund_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4460,6 +4607,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-23'
 const endDate = '2020-10-30'
 
@@ -4471,7 +4619,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createTimesheet(xeroTenantId, timesheet);
+  const response = await xero.accountingApi.createTimesheet(xeroTenantId, timesheet, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4516,6 +4664,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createTimesheet_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -7055,9 +7223,10 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const leaveApplicationID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.rejectLeaveApplication(xeroTenantId, leaveApplicationID);
+  const response = await xero.accountingApi.rejectLeaveApplication(xeroTenantId, leaveApplicationID, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -7135,6 +7304,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_rejectLeaveApplication_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -7168,6 +7357,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 const dateOfBirth = '2000-10-28'
 
 const homeAddress: HomeAddress = { 
@@ -7185,7 +7375,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateEmployee(xeroTenantId, employeeID,  employee);
+  const response = await xero.accountingApi.updateEmployee(xeroTenantId, employeeID, idempotencyKey, employee);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -7263,6 +7453,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateEmployee_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -7331,6 +7541,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const leaveApplicationID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-28'
 const endDate = '2020-10-30'
 
@@ -7343,7 +7554,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateLeaveApplication(xeroTenantId, leaveApplicationID, leaveApplication);
+  const response = await xero.accountingApi.updateLeaveApplication(xeroTenantId, leaveApplicationID, leaveApplication, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -7421,6 +7632,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateLeaveApplication_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -7493,13 +7724,14 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const payRunID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const payRun: PayRun = { 
   payrollCalendarID: "00000000-0000-0000-0000-000000000000"
 }; 
 
 try {
-  const response = await xero.accountingApi.updatePayRun(xeroTenantId, payRunID,  payRun);
+  const response = await xero.accountingApi.updatePayRun(xeroTenantId, payRunID, idempotencyKey, payRun);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -7577,6 +7809,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updatePayRun_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -7645,6 +7897,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const payslipID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const earningsLine: EarningsLine = { 
   earningsRateID: "00000000-0000-0000-0000-000000000000",
@@ -7661,7 +7914,7 @@ <h3>Usage and SDK Samples</h3>
 payslipLines.push(payslipLine)
 
 try {
-  const response = await xero.accountingApi.updatePayslip(xeroTenantId, payslipID,  payslipLines);
+  const response = await xero.accountingApi.updatePayslip(xeroTenantId, payslipID, idempotencyKey, payslipLines);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -7739,6 +7992,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updatePayslip_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -7807,6 +8080,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const superFundID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const superFund: SuperFund = { 
   type: SuperFundType.REGULATED,
@@ -7814,7 +8088,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateSuperfund(xeroTenantId, superFundID,  superFund);
+  const response = await xero.accountingApi.updateSuperfund(xeroTenantId, superFundID, idempotencyKey, superFund);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -7892,6 +8166,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateSuperfund_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -7960,6 +8254,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const timesheetID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-23'
 const endDate = '2020-10-30'
 
@@ -7971,7 +8266,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateTimesheet(xeroTenantId, timesheetID,  timesheet);
+  const response = await xero.accountingApi.updateTimesheet(xeroTenantId, timesheetID, idempotencyKey, timesheet);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -8049,6 +8344,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateTimesheet_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
diff --git a/docs/payroll-nz/index.html b/docs/payroll-nz/index.html
index 175b5850d..bb29d3eda 100644
--- a/docs/payroll-nz/index.html
+++ b/docs/payroll-nz/index.html
@@ -3839,7 +3839,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="PayrollNz"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="PayrollNz"><strong>VSN: </strong>4.35.0</li>
+              <li class="nav-header" data-group="PayrollNz"><strong>VSN: </strong>4.36.0</li>
               <li class="nav-header" data-group="PayrollNz"><a href="#api-PayrollNz">Methods</a></li>
               <li data-group="PayrollNz" data-name="approveTimesheet" class="">
                 <a href="#api-PayrollNz-approveTimesheet">approveTimesheet</a>
@@ -4090,9 +4090,10 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const timesheetID = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.approveTimesheet(xeroTenantId, timesheetID);
+  const response = await xero.accountingApi.approveTimesheet(xeroTenantId, timesheetID, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4170,6 +4171,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_approveTimesheet_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4202,6 +4223,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 const deduction: Deduction = { 
   deductionName: "Deduction test",
@@ -4210,7 +4232,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createDeduction(xeroTenantId, deduction);
+  const response = await xero.accountingApi.createDeduction(xeroTenantId, deduction, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4255,6 +4277,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createDeduction_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4323,6 +4365,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 const earningsRate: EarningsRate = { 
   earningsType: EarningsRate.EarningsTypeEnum.REGULAREARNINGS,
@@ -4331,7 +4374,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEarningsRate(xeroTenantId, earningsRate);
+  const response = await xero.accountingApi.createEarningsRate(xeroTenantId, earningsRate, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4376,6 +4419,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEarningsRate_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4444,6 +4507,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 const dateOfBirth = '2000-10-28'
 
 const address: Address = { 
@@ -4461,7 +4525,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployee(xeroTenantId, employee);
+  const response = await xero.accountingApi.createEmployee(xeroTenantId, employee, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4506,6 +4570,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployee_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4575,6 +4659,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const earningsTemplate: EarningsTemplate = { 
   payTemplateEarningID: "00000000-0000-0000-0000-000000000000",
@@ -4588,7 +4673,7 @@ <h3>Usage and SDK Samples</h3>
 earningsTemplates.push(earningsTemplate)
 
 try {
-  const response = await xero.accountingApi.createEmployeeEarningsTemplate(xeroTenantId, employeeID, earningsTemplate);
+  const response = await xero.accountingApi.createEmployeeEarningsTemplate(xeroTenantId, employeeID, earningsTemplate, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4666,6 +4751,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployeeEarningsTemplate_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4735,6 +4840,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-28'
 const endDate = '2020-10-30'
 
@@ -4745,7 +4851,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployeeLeave(xeroTenantId, employeeID, employeeLeave);
+  const response = await xero.accountingApi.createEmployeeLeave(xeroTenantId, employeeID, employeeLeave, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4823,6 +4929,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployeeLeave_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4892,6 +5018,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const employeeLeaveSetup: EmployeeLeaveSetup = { 
   includeHolidayPay: false,
@@ -4903,7 +5030,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployeeLeaveSetup(xeroTenantId, employeeID, employeeLeaveSetup);
+  const response = await xero.accountingApi.createEmployeeLeaveSetup(xeroTenantId, employeeID, employeeLeaveSetup, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4981,6 +5108,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployeeLeaveSetup_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -5050,6 +5197,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const employeeLeaveType: EmployeeLeaveType = { 
   leaveTypeID: "00000000-0000-0000-0000-000000000000",
@@ -5058,7 +5206,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployeeLeaveType(xeroTenantId, employeeID, employeeLeaveType);
+  const response = await xero.accountingApi.createEmployeeLeaveType(xeroTenantId, employeeID, employeeLeaveType, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -5136,6 +5284,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployeeLeaveType_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -5205,6 +5373,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 const periodEndDate = '2020-10-30'
 
 const employeeOpeningBalance: EmployeeOpeningBalance = { 
@@ -5217,7 +5386,7 @@ <h3>Usage and SDK Samples</h3>
 employeeOpeningBalances.push(employeeOpeningBalance)
 
 try {
-  const response = await xero.accountingApi.createEmployeeOpeningBalances(xeroTenantId, employeeID, employeeOpeningBalance);
+  const response = await xero.accountingApi.createEmployeeOpeningBalances(xeroTenantId, employeeID, employeeOpeningBalance, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -5295,6 +5464,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployeeOpeningBalances_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -5364,6 +5553,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const bankAccount: BankAccount = { 
   accountName: "Charlotte Danes",
@@ -5378,7 +5568,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployeePaymentMethod(xeroTenantId, employeeID, paymentMethod);
+  const response = await xero.accountingApi.createEmployeePaymentMethod(xeroTenantId, employeeID, paymentMethod, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -5456,6 +5646,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployeePaymentMethod_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -5524,6 +5734,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const salaryAndWage: SalaryAndWage = { 
   earningsRateID: "00000000-0000-0000-0000-000000000000",
@@ -5533,7 +5744,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployeeSalaryAndWage(xeroTenantId, employeeID, salaryAndWage);
+  const response = await xero.accountingApi.createEmployeeSalaryAndWage(xeroTenantId, employeeID, salaryAndWage, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -5611,6 +5822,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployeeSalaryAndWage_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -5680,6 +5911,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-28'
 
 const employment: Employment = { 
@@ -5688,7 +5920,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployment(xeroTenantId, employeeID, employment);
+  const response = await xero.accountingApi.createEmployment(xeroTenantId, employeeID, employment, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -5766,6 +5998,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployment_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -5834,6 +6086,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 const leaveType: LeaveType = { 
   name: "LeaveType",
@@ -5842,7 +6095,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createLeaveType(xeroTenantId, leaveType);
+  const response = await xero.accountingApi.createLeaveType(xeroTenantId, leaveType, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -5887,6 +6140,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createLeaveType_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -5956,6 +6229,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const earningsTemplate: EarningsTemplate = { 
   payTemplateEarningID: "00000000-0000-0000-0000-000000000000",
@@ -5969,7 +6243,7 @@ <h3>Usage and SDK Samples</h3>
 earningsTemplates.push(earningsTemplate)
 
 try {
-  const response = await xero.accountingApi.createMultipleEmployeeEarningsTemplate(xeroTenantId, employeeID, earningsTemplate);
+  const response = await xero.accountingApi.createMultipleEmployeeEarningsTemplate(xeroTenantId, employeeID, earningsTemplate, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -6047,6 +6321,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createMultipleEmployeeEarningsTemplate_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -6115,6 +6409,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 const payRun: PayRun = { 
   payRunType: PayRun.PayRunTypeEnum.Scheduled,
@@ -6122,7 +6417,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createPayRun(xeroTenantId, payRun);
+  const response = await xero.accountingApi.createPayRun(xeroTenantId, payRun, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -6167,6 +6462,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createPayRun_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -6235,6 +6550,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-28'
 const paymentDate = '2020-10-30'
 
@@ -6245,7 +6561,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createPayRunCalendar(xeroTenantId, payRunCalendar);
+  const response = await xero.accountingApi.createPayRunCalendar(xeroTenantId, payRunCalendar, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -6290,6 +6606,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createPayRunCalendar_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -6358,6 +6694,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 const reimbursement: Reimbursement = { 
   name: "Test Reimbursement",
@@ -6368,7 +6705,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createReimbursement(xeroTenantId, reimbursement);
+  const response = await xero.accountingApi.createReimbursement(xeroTenantId, reimbursement, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -6413,6 +6750,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createReimbursement_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -6481,6 +6838,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 const benefit: Benefit = { 
   category: Benefit.CategoryEnum.ComplyingFund,
@@ -6492,7 +6850,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createSuperannuation(xeroTenantId, benefit);
+  const response = await xero.accountingApi.createSuperannuation(xeroTenantId, benefit, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -6537,6 +6895,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createSuperannuation_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -6605,6 +6983,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-28'
 const endDate = '2020-10-30'
 
@@ -6616,7 +6995,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createTimesheet(xeroTenantId, timesheet);
+  const response = await xero.accountingApi.createTimesheet(xeroTenantId, timesheet, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -6661,6 +7040,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createTimesheet_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -6730,6 +7129,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const timesheetID = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 const date = '2020-10-28'
 
 const timesheetLine: TimesheetLine = { 
@@ -6741,7 +7141,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createTimesheetLine(xeroTenantId, timesheetID, timesheetLine);
+  const response = await xero.accountingApi.createTimesheetLine(xeroTenantId, timesheetID, timesheetLine, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -6819,6 +7219,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createTimesheetLine_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -11744,9 +12164,10 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const timesheetID = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.revertTimesheet(xeroTenantId, timesheetID);
+  const response = await xero.accountingApi.revertTimesheet(xeroTenantId, timesheetID, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -11824,6 +12245,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_revertTimesheet_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -11857,6 +12298,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 const dateOfBirth = '2000-10-28'
 
 const address: Address = { 
@@ -11874,7 +12316,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateEmployee(xeroTenantId, employeeID, employee);
+  const response = await xero.accountingApi.updateEmployee(xeroTenantId, employeeID, employee, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -11952,6 +12394,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateEmployee_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12022,6 +12484,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
 const payTemplateEarningID = '3fa85f64-5717-4562-b3fc-2c963f66afa6';
+const idempotencyKey = 'KEY_VALUE';
 
 const earningsTemplate: EarningsTemplate = { 
   payTemplateEarningID: "00000000-0000-0000-0000-000000000000",
@@ -12035,7 +12498,7 @@ <h3>Usage and SDK Samples</h3>
 earningsTemplates.push(earningsTemplate)
 
 try {
-  const response = await xero.accountingApi.updateEmployeeEarningsTemplate(xeroTenantId, employeeID, payTemplateEarningID, earningsTemplate);
+  const response = await xero.accountingApi.updateEmployeeEarningsTemplate(xeroTenantId, employeeID, payTemplateEarningID, earningsTemplate, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12139,6 +12602,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateEmployeeEarningsTemplate_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12209,6 +12692,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
 const leaveID = 'c4be24e5-e840-4c92-9eaa-2d86cd596314';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-28'
 const endDate = '2020-10-30'
 
@@ -12219,7 +12703,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateEmployeeLeave(xeroTenantId, employeeID, leaveID, employeeLeave);
+  const response = await xero.accountingApi.updateEmployeeLeave(xeroTenantId, employeeID, leaveID, employeeLeave, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12323,6 +12807,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateEmployeeLeave_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12393,6 +12897,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
 const salaryAndWagesID = '3fa85f64-5717-4562-b3fc-2c963f66afa6';
+const idempotencyKey = 'KEY_VALUE';
 
 const salaryAndWage: SalaryAndWage = { 
   earningsRateID: "00000000-0000-0000-0000-000000000000",
@@ -12402,7 +12907,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateEmployeeSalaryAndWage(xeroTenantId, employeeID, salaryAndWagesID, salaryAndWage);
+  const response = await xero.accountingApi.updateEmployeeSalaryAndWage(xeroTenantId, employeeID, salaryAndWagesID, salaryAndWage, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12506,6 +13011,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateEmployeeSalaryAndWage_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12575,6 +13100,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 const studentLoanAsAt = '2020-10-30'
 
 const employeeTax: EmployeeTax = { 
@@ -12593,7 +13119,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateEmployeeTax(xeroTenantId, employeeID, employeeTax);
+  const response = await xero.accountingApi.updateEmployeeTax(xeroTenantId, employeeID, employeeTax, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12671,6 +13197,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateEmployeeTax_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12739,6 +13285,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const payRunID = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-28'
 const paymentDate = '2020-10-30'
 
@@ -12749,7 +13296,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updatePayRun(xeroTenantId, payRunID, payRun);
+  const response = await xero.accountingApi.updatePayRun(xeroTenantId, payRunID, payRun, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12827,6 +13374,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updatePayRun_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12896,6 +13463,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const paySlipID = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 
 const earningsLine: EarningsLine = { 
   earningsLineID: "00000000-0000-0000-0000-000000000000",
@@ -12913,7 +13481,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updatePaySlipLineItems(xeroTenantId, paySlipID, paySlip);
+  const response = await xero.accountingApi.updatePaySlipLineItems(xeroTenantId, paySlipID, paySlip, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12991,6 +13559,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updatePaySlipLineItems_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -13061,6 +13649,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'xeroTenantId_example';
 const timesheetID = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
 const timesheetLineID = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 const date = '2020-10-28'
 
 const timesheetLine: TimesheetLine = { 
@@ -13072,7 +13661,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateTimesheetLine(xeroTenantId, timesheetID, timesheetLineID, timesheetLine);
+  const response = await xero.accountingApi.updateTimesheetLine(xeroTenantId, timesheetID, timesheetLineID, timesheetLine, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -13176,6 +13765,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateTimesheetLine_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
diff --git a/docs/payroll-uk/index.html b/docs/payroll-uk/index.html
index caf9c798f..4f383a43c 100644
--- a/docs/payroll-uk/index.html
+++ b/docs/payroll-uk/index.html
@@ -3511,7 +3511,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="PayrollUk"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="PayrollUk"><strong>VSN: </strong>4.35.0</li>
+              <li class="nav-header" data-group="PayrollUk"><strong>VSN: </strong>4.36.0</li>
               <li class="nav-header" data-group="PayrollUk"><a href="#api-PayrollUk">Methods</a></li>
               <li data-group="PayrollUk" data-name="approveTimesheet" class="">
                 <a href="#api-PayrollUk-approveTimesheet">approveTimesheet</a>
@@ -3768,9 +3768,10 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const timesheetID = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.approveTimesheet(xeroTenantId, timesheetID);
+  const response = await xero.accountingApi.approveTimesheet(xeroTenantId, timesheetID, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -3848,6 +3849,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_approveTimesheet_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -3880,6 +3901,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 const benefit: Benefit = { 
   name: "Benefit Name",
@@ -3889,7 +3911,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createBenefit(xeroTenantId, benefit);
+  const response = await xero.accountingApi.createBenefit(xeroTenantId, benefit, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -3934,6 +3956,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createBenefit_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4002,6 +4044,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 const deduction: Deduction = { 
   deductionName: "Test Deduction",
@@ -4011,7 +4054,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createDeduction(xeroTenantId, deduction);
+  const response = await xero.accountingApi.createDeduction(xeroTenantId, deduction, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4056,6 +4099,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createDeduction_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4124,6 +4187,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 const earningsRate: EarningsRate = { 
   earningsType: EarningsRate.EarningsTypeEnum.RegularEarnings,
@@ -4133,7 +4197,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEarningsRate(xeroTenantId, earningsRate);
+  const response = await xero.accountingApi.createEarningsRate(xeroTenantId, earningsRate, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4178,6 +4242,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEarningsRate_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4246,6 +4330,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 const dateOfBirth = '2000-10-28'
 
 const address: Address = { 
@@ -4263,7 +4348,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployee(xeroTenantId, employee);
+  const response = await xero.accountingApi.createEmployee(xeroTenantId, employee, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4308,6 +4393,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployee_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4377,6 +4482,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const earningsTemplate: EarningsTemplate = { 
   payTemplateEarningID: "00000000-0000-0000-0000-000000000000",
@@ -4390,7 +4496,7 @@ <h3>Usage and SDK Samples</h3>
 earningsTemplates.push(earningsTemplate)
 
 try {
-  const response = await xero.accountingApi.createEmployeeEarningsTemplate(xeroTenantId, employeeID, earningsTemplate);
+  const response = await xero.accountingApi.createEmployeeEarningsTemplate(xeroTenantId, employeeID, earningsTemplate, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4468,6 +4574,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployeeEarningsTemplate_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4536,6 +4662,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-28'
 const endDate = '2020-10-30'
 
@@ -4546,7 +4673,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployeeLeave(xeroTenantId, employeeID, employeeLeave);
+  const response = await xero.accountingApi.createEmployeeLeave(xeroTenantId, employeeID, employeeLeave, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4624,6 +4751,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployeeLeave_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4693,6 +4840,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const employeeLeaveType: EmployeeLeaveType = { 
   leaveTypeID: "00000000-0000-0000-0000-000000000000",
@@ -4701,7 +4849,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployeeLeaveType(xeroTenantId, employeeID, employeeLeaveType);
+  const response = await xero.accountingApi.createEmployeeLeaveType(xeroTenantId, employeeID, employeeLeaveType, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4779,6 +4927,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployeeLeaveType_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4848,6 +5016,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const employeeOpeningBalances: EmployeeOpeningBalances = { 
   statutoryMaternityPay: 0.0,
@@ -4858,7 +5027,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployeeOpeningBalances(xeroTenantId, employeeID, employeeOpeningBalances);
+  const response = await xero.accountingApi.createEmployeeOpeningBalances(xeroTenantId, employeeID, employeeOpeningBalances, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4936,6 +5105,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployeeOpeningBalances_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -5005,6 +5194,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const bankAccount: BankAccount = { 
   accountName: "Charlotte Danes",
@@ -5019,7 +5209,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployeePaymentMethod(xeroTenantId, employeeID, paymentMethod);
+  const response = await xero.accountingApi.createEmployeePaymentMethod(xeroTenantId, employeeID, paymentMethod, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -5097,6 +5287,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployeePaymentMethod_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -5166,6 +5376,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const salaryAndWage: SalaryAndWage = { 
   earningsRateID: "00000000-0000-0000-0000-000000000000",
@@ -5176,7 +5387,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployeeSalaryAndWage(xeroTenantId, employeeID, salaryAndWage);
+  const response = await xero.accountingApi.createEmployeeSalaryAndWage(xeroTenantId, employeeID, salaryAndWage, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -5254,6 +5465,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployeeSalaryAndWage_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -5322,6 +5553,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-28'
 const endDate = '2020-10-30'
 
@@ -5333,7 +5565,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployeeStatutorySickLeave(xeroTenantId, employeeStatutorySickLeave);
+  const response = await xero.accountingApi.createEmployeeStatutorySickLeave(xeroTenantId, employeeStatutorySickLeave, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -5378,6 +5610,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployeeStatutorySickLeave_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -5447,6 +5699,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-28'
 
 const employment: Employment = { 
@@ -5455,7 +5708,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createEmployment(xeroTenantId, employeeID, employment);
+  const response = await xero.accountingApi.createEmployment(xeroTenantId, employeeID, employment, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -5533,6 +5786,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createEmployment_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -5601,6 +5874,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 const leaveType: LeaveType = { 
   name: "LeaveType",
@@ -5609,7 +5883,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createLeaveType(xeroTenantId, leaveType);
+  const response = await xero.accountingApi.createLeaveType(xeroTenantId, leaveType, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -5654,6 +5928,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createLeaveType_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -5723,6 +6017,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const earningsTemplate: EarningsTemplate = { 
   payTemplateEarningID: "00000000-0000-0000-0000-000000000000",
@@ -5736,7 +6031,7 @@ <h3>Usage and SDK Samples</h3>
 earningsTemplates.push(earningsTemplate)
 
 try {
-  const response = await xero.accountingApi.createMultipleEmployeeEarningsTemplate(xeroTenantId, employeeID, earningsTemplate);
+  const response = await xero.accountingApi.createMultipleEmployeeEarningsTemplate(xeroTenantId, employeeID, earningsTemplate, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -5814,6 +6109,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createMultipleEmployeeEarningsTemplate_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -5882,6 +6197,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-28'
 const paymentDate = '2020-10-30'
 
@@ -5892,7 +6208,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createPayRunCalendar(xeroTenantId, payRunCalendar);
+  const response = await xero.accountingApi.createPayRunCalendar(xeroTenantId, payRunCalendar, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -5937,6 +6253,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createPayRunCalendar_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -6005,6 +6341,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 const reimbursement: Reimbursement = { 
   name: "Test Reimbursement",
@@ -6012,7 +6349,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createReimbursement(xeroTenantId, reimbursement);
+  const response = await xero.accountingApi.createReimbursement(xeroTenantId, reimbursement, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -6057,6 +6394,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createReimbursement_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -6125,6 +6482,7 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-28'
 const endDate = '2020-10-30'
 
@@ -6136,7 +6494,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createTimesheet(xeroTenantId, timesheet);
+  const response = await xero.accountingApi.createTimesheet(xeroTenantId, timesheet, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -6181,6 +6539,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createTimesheet_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -6250,6 +6628,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const timesheetID = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 const date = '2020-10-28'
 
 const timesheetLine: TimesheetLine = { 
@@ -6261,7 +6640,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.createTimesheetLine(xeroTenantId, timesheetID, timesheetLine);
+  const response = await xero.accountingApi.createTimesheetLine(xeroTenantId, timesheetID, timesheetLine, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -6339,6 +6718,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createTimesheetLine_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -11843,9 +12242,10 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const timesheetID = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.revertTimesheet(xeroTenantId, timesheetID);
+  const response = await xero.accountingApi.revertTimesheet(xeroTenantId, timesheetID, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -11923,6 +12323,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_revertTimesheet_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -11956,6 +12376,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 const dateOfBirth = '2000-10-28'
 
 const address: Address = { 
@@ -11973,7 +12394,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateEmployee(xeroTenantId, employeeID, employee);
+  const response = await xero.accountingApi.updateEmployee(xeroTenantId, employeeID, employee, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12051,6 +12472,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateEmployee_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12121,6 +12562,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
 const payTemplateEarningID = '3fa85f64-5717-4562-b3fc-2c963f66afa6';
+const idempotencyKey = 'KEY_VALUE';
 
 const earningsTemplate: EarningsTemplate = { 
   payTemplateEarningID: "00000000-0000-0000-0000-000000000000",
@@ -12134,7 +12576,7 @@ <h3>Usage and SDK Samples</h3>
 earningsTemplates.push(earningsTemplate)
 
 try {
-  const response = await xero.accountingApi.updateEmployeeEarningsTemplate(xeroTenantId, employeeID, payTemplateEarningID, earningsTemplate);
+  const response = await xero.accountingApi.updateEmployeeEarningsTemplate(xeroTenantId, employeeID, payTemplateEarningID, earningsTemplate, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12238,6 +12680,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateEmployeeEarningsTemplate_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12308,6 +12770,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
 const leaveID = 'c4be24e5-e840-4c92-9eaa-2d86cd596314';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-28'
 const endDate = '2020-10-30'
 
@@ -12318,7 +12781,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateEmployeeLeave(xeroTenantId, employeeID, leaveID, employeeLeave);
+  const response = await xero.accountingApi.updateEmployeeLeave(xeroTenantId, employeeID, leaveID, employeeLeave, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12422,6 +12885,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateEmployeeLeave_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12491,6 +12974,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
+const idempotencyKey = 'KEY_VALUE';
 
 const employeeOpeningBalances: EmployeeOpeningBalances = { 
   statutoryMaternityPay: 0.0,
@@ -12501,7 +12985,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateEmployeeOpeningBalances(xeroTenantId, employeeID, employeeOpeningBalances);
+  const response = await xero.accountingApi.updateEmployeeOpeningBalances(xeroTenantId, employeeID, employeeOpeningBalances, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12579,6 +13063,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateEmployeeOpeningBalances_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12649,6 +13153,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'xeroTenantId_example';
 const employeeID = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c';
 const salaryAndWagesID = '3fa85f64-5717-4562-b3fc-2c963f66afa6';
+const idempotencyKey = 'KEY_VALUE';
 
 const salaryAndWage: SalaryAndWage = { 
   earningsRateID: "00000000-0000-0000-0000-000000000000",
@@ -12659,7 +13164,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateEmployeeSalaryAndWage(xeroTenantId, employeeID, salaryAndWagesID, salaryAndWage);
+  const response = await xero.accountingApi.updateEmployeeSalaryAndWage(xeroTenantId, employeeID, salaryAndWagesID, salaryAndWage, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12763,6 +13268,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateEmployeeSalaryAndWage_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12832,6 +13357,7 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const payRunID = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 const startDate = '2020-10-28'
 const paymentDate = '2020-10-30'
 
@@ -12842,7 +13368,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updatePayRun(xeroTenantId, payRunID, payRun);
+  const response = await xero.accountingApi.updatePayRun(xeroTenantId, payRunID, payRun, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -12920,6 +13446,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updatePayRun_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -12990,6 +13536,7 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'xeroTenantId_example';
 const timesheetID = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
 const timesheetLineID = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 const date = '2020-10-28'
 
 const timesheetLine: TimesheetLine = { 
@@ -13001,7 +13548,7 @@ <h3>Usage and SDK Samples</h3>
 }; 
 
 try {
-  const response = await xero.accountingApi.updateTimesheetLine(xeroTenantId, timesheetID, timesheetLineID, timesheetLine);
+  const response = await xero.accountingApi.updateTimesheetLine(xeroTenantId, timesheetID, timesheetLineID, timesheetLine, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -13105,6 +13652,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateTimesheetLine_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
diff --git a/docs/projects/index.html b/docs/projects/index.html
index f3ea9591a..1ff5226c6 100644
--- a/docs/projects/index.html
+++ b/docs/projects/index.html
@@ -1463,7 +1463,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Project"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Project"><strong>VSN: </strong>4.35.0</li>
+              <li class="nav-header" data-group="Project"><strong>VSN: </strong>4.36.0</li>
               <li class="nav-header" data-group="Project"><a href="#api-Project">Methods</a></li>
               <li data-group="Project" data-name="createProject" class="">
                 <a href="#api-Project-createProject">createProject</a>
@@ -1557,9 +1557,10 @@ <h3>Usage and SDK Samples</h3>
                       <pre class="prettyprint"><code class="language-javascript">await xero.setTokenSet(tokenSet);
 
 const xeroTenantId = 'xeroTenantId_example';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.createProject(xeroTenantId, projectCreateOrUpdate);
+  const response = await xero.accountingApi.createProject(xeroTenantId, projectCreateOrUpdate, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -1604,6 +1605,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createProject_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -1674,9 +1695,10 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const projectId = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.createTask(xeroTenantId, projectId, taskCreateOrUpdate);
+  const response = await xero.accountingApi.createTask(xeroTenantId, projectId, taskCreateOrUpdate, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -1754,6 +1776,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createTask_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -1824,9 +1866,10 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const projectId = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.createTimeEntry(xeroTenantId, projectId, timeEntryCreateOrUpdate);
+  const response = await xero.accountingApi.createTimeEntry(xeroTenantId, projectId, timeEntryCreateOrUpdate, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -1904,6 +1947,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_createTimeEntry_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -3559,9 +3622,10 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const projectId = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.patchProject(xeroTenantId, projectId, projectPatch);
+  const response = await xero.accountingApi.patchProject(xeroTenantId, projectId, projectPatch, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -3639,6 +3703,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_patchProject_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -3709,9 +3793,10 @@ <h3>Usage and SDK Samples</h3>
 
 const xeroTenantId = 'xeroTenantId_example';
 const projectId = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.updateProject(xeroTenantId, projectId, projectCreateOrUpdate);
+  const response = await xero.accountingApi.updateProject(xeroTenantId, projectId, projectCreateOrUpdate, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -3789,6 +3874,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateProject_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -3860,9 +3965,10 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'xeroTenantId_example';
 const projectId = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
 const taskId = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.updateTask(xeroTenantId, projectId, taskId, taskCreateOrUpdate);
+  const response = await xero.accountingApi.updateTask(xeroTenantId, projectId, taskId, taskCreateOrUpdate, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -3966,6 +4072,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateTask_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
@@ -4036,9 +4162,10 @@ <h3>Usage and SDK Samples</h3>
 const xeroTenantId = 'xeroTenantId_example';
 const projectId = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
 const timeEntryId = '38400000-8cf0-11bd-b23e-10b96e4ef00d';
+const idempotencyKey = 'KEY_VALUE';
 
 try {
-  const response = await xero.accountingApi.updateTimeEntry(xeroTenantId, projectId, timeEntryId, timeEntryCreateOrUpdate);
+  const response = await xero.accountingApi.updateTimeEntry(xeroTenantId, projectId, timeEntryId, timeEntryCreateOrUpdate, idempotencyKey);
   console.log(response.body || response.response.statusCode)
 } catch (err) {
   const error = JSON.stringify(err.response.body, null, 2)
@@ -4142,6 +4269,26 @@ <h2>Parameters</h2>
         </div>
     </div>
 </td>
+</tr>
+
+                    <tr><td style="width:150px;">Idempotency-Key</td>
+<td>
+
+
+    <div id="d2e199_updateTimeEntry_idempotencyKey">
+        <div class="json-schema-view">
+            <div class="primitive">
+                <span class="type">
+                    String
+                </span>
+
+                    <div class="inner description marked">
+This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
+                    </div>
+            </div>
+        </div>
+    </div>
+</td>
 </tr>
 
                   </table>
diff --git a/package.json b/package.json
index 18959b183..783674f20 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "xero-node",
-  "version": "4.35.0",
+  "version": "4.36.0",
   "description": "Xero NodeJS OAuth 2.0 client for xero-node",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
diff --git a/src/gen/api/accountingApi.ts b/src/gen/api/accountingApi.ts
index b836c7263..52965f4a6 100644
--- a/src/gen/api/accountingApi.ts
+++ b/src/gen/api/accountingApi.ts
@@ -2,7 +2,7 @@
  * Xero Accounting API
  * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
  *
- * The version of the OpenAPI document: 2.38.0
+ * The version of the OpenAPI document: 2.40.0
  * Contact: api@xero.com
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
@@ -18,6 +18,7 @@ import fs = require('fs');
 import { Account } from '../model/accounting/account';
 import { Accounts } from '../model/accounting/accounts';
 import { Actions } from '../model/accounting/actions';
+import { Allocation } from '../model/accounting/allocation';
 import { Allocations } from '../model/accounting/allocations';
 import { Attachments } from '../model/accounting/attachments';
 import { BankTransactions } from '../model/accounting/bankTransactions';
@@ -82,7 +83,7 @@ export enum AccountingApiApiKeys {
 
 export class AccountingApi {
     protected _basePath = defaultBasePath;
-    protected defaultHeaders : any = {'user-agent': 'xero-node-4.35.0'};
+    protected defaultHeaders : any = {'user-agent': 'xero-node-4.36.0'};
     protected _useQuerystring : boolean = false;
     protected binaryHeaders : any = {};
 
@@ -133,8 +134,9 @@ export class AccountingApi {
      * @summary Creates a new chart of accounts
      * @param xeroTenantId Xero identifier for Tenant
      * @param account Account object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createAccount (xeroTenantId: string, account: Account, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Accounts;  }> {
+    public async createAccount (xeroTenantId: string, account: Account, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Accounts;  }> {
         const localVarPath = this.basePath + '/Accounts';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -151,6 +153,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -200,8 +203,9 @@ export class AccountingApi {
      * @param accountID Unique identifier for Account object
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createAccountAttachmentByFileName (xeroTenantId: string, accountID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async createAccountAttachmentByFileName (xeroTenantId: string, accountID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/Accounts/{AccountID}/Attachments/{FileName}'
             .replace('{' + 'AccountID' + '}', encodeURIComponent(String(accountID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -231,6 +235,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -301,8 +306,9 @@ export class AccountingApi {
      * @param bankTransactionID Xero generated unique identifier for a bank transaction
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createBankTransactionAttachmentByFileName (xeroTenantId: string, bankTransactionID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async createBankTransactionAttachmentByFileName (xeroTenantId: string, bankTransactionID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/BankTransactions/{BankTransactionID}/Attachments/{FileName}'
             .replace('{' + 'BankTransactionID' + '}', encodeURIComponent(String(bankTransactionID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -332,6 +338,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -401,8 +408,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param bankTransactionID Xero generated unique identifier for a bank transaction
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createBankTransactionHistoryRecord (xeroTenantId: string, bankTransactionID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createBankTransactionHistoryRecord (xeroTenantId: string, bankTransactionID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/BankTransactions/{BankTransactionID}/History'
             .replace('{' + 'BankTransactionID' + '}', encodeURIComponent(String(bankTransactionID)));
         let localVarQueryParameters: any = {};
@@ -425,6 +433,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -472,10 +481,11 @@ export class AccountingApi {
      * @summary Creates one or more spent or received money transaction
      * @param xeroTenantId Xero identifier for Tenant
      * @param bankTransactions BankTransactions with an array of BankTransaction objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      * @param unitdp e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
      */     
-    public async createBankTransactions (xeroTenantId: string, bankTransactions: BankTransactions, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BankTransactions;  }> {
+    public async createBankTransactions (xeroTenantId: string, bankTransactions: BankTransactions, idempotencyKey?: string, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BankTransactions;  }> {
         const localVarPath = this.basePath + '/BankTransactions';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -500,6 +510,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -547,8 +558,9 @@ export class AccountingApi {
      * @summary Creates a bank transfer
      * @param xeroTenantId Xero identifier for Tenant
      * @param bankTransfers BankTransfers with array of BankTransfer objects in request body
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createBankTransfer (xeroTenantId: string, bankTransfers: BankTransfers, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BankTransfers;  }> {
+    public async createBankTransfer (xeroTenantId: string, bankTransfers: BankTransfers, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BankTransfers;  }> {
         const localVarPath = this.basePath + '/BankTransfers';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -565,6 +577,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -613,8 +626,9 @@ export class AccountingApi {
      * @param bankTransferID Xero generated unique identifier for a bank transfer
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createBankTransferAttachmentByFileName (xeroTenantId: string, bankTransferID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async createBankTransferAttachmentByFileName (xeroTenantId: string, bankTransferID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/BankTransfers/{BankTransferID}/Attachments/{FileName}'
             .replace('{' + 'BankTransferID' + '}', encodeURIComponent(String(bankTransferID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -644,6 +658,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -713,8 +728,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param bankTransferID Xero generated unique identifier for a bank transfer
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createBankTransferHistoryRecord (xeroTenantId: string, bankTransferID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createBankTransferHistoryRecord (xeroTenantId: string, bankTransferID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/BankTransfers/{BankTransferID}/History'
             .replace('{' + 'BankTransferID' + '}', encodeURIComponent(String(bankTransferID)));
         let localVarQueryParameters: any = {};
@@ -737,6 +753,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -785,8 +802,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param batchPayments BatchPayments with an array of Payments in body of request
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createBatchPayment (xeroTenantId: string, batchPayments: BatchPayments, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BatchPayments;  }> {
+    public async createBatchPayment (xeroTenantId: string, batchPayments: BatchPayments, summarizeErrors?: boolean, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BatchPayments;  }> {
         const localVarPath = this.basePath + '/BatchPayments';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -807,6 +825,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -855,8 +874,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param batchPaymentID Unique identifier for BatchPayment
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createBatchPaymentHistoryRecord (xeroTenantId: string, batchPaymentID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createBatchPaymentHistoryRecord (xeroTenantId: string, batchPaymentID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/BatchPayments/{BatchPaymentID}/History'
             .replace('{' + 'BatchPaymentID' + '}', encodeURIComponent(String(batchPaymentID)));
         let localVarQueryParameters: any = {};
@@ -879,6 +899,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -927,8 +948,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param brandingThemeID Unique identifier for a Branding Theme
      * @param paymentServices PaymentServices array with PaymentService object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createBrandingThemePaymentServices (xeroTenantId: string, brandingThemeID: string, paymentServices: PaymentServices, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PaymentServices;  }> {
+    public async createBrandingThemePaymentServices (xeroTenantId: string, brandingThemeID: string, paymentServices: PaymentServices, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PaymentServices;  }> {
         const localVarPath = this.basePath + '/BrandingThemes/{BrandingThemeID}/PaymentServices'
             .replace('{' + 'BrandingThemeID' + '}', encodeURIComponent(String(brandingThemeID)));
         let localVarQueryParameters: any = {};
@@ -951,6 +973,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -999,8 +1022,9 @@ export class AccountingApi {
      * @param contactID Unique identifier for a Contact
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createContactAttachmentByFileName (xeroTenantId: string, contactID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async createContactAttachmentByFileName (xeroTenantId: string, contactID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/Contacts/{ContactID}/Attachments/{FileName}'
             .replace('{' + 'ContactID' + '}', encodeURIComponent(String(contactID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -1030,6 +1054,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1098,8 +1123,9 @@ export class AccountingApi {
      * @summary Creates a contact group
      * @param xeroTenantId Xero identifier for Tenant
      * @param contactGroups ContactGroups with an array of names in request body
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createContactGroup (xeroTenantId: string, contactGroups: ContactGroups, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ContactGroups;  }> {
+    public async createContactGroup (xeroTenantId: string, contactGroups: ContactGroups, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ContactGroups;  }> {
         const localVarPath = this.basePath + '/ContactGroups';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1116,6 +1142,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1164,8 +1191,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param contactGroupID Unique identifier for a Contact Group
      * @param contacts Contacts with array of contacts specifying the ContactID to be added to ContactGroup in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createContactGroupContacts (xeroTenantId: string, contactGroupID: string, contacts: Contacts, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Contacts;  }> {
+    public async createContactGroupContacts (xeroTenantId: string, contactGroupID: string, contacts: Contacts, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Contacts;  }> {
         const localVarPath = this.basePath + '/ContactGroups/{ContactGroupID}/Contacts'
             .replace('{' + 'ContactGroupID' + '}', encodeURIComponent(String(contactGroupID)));
         let localVarQueryParameters: any = {};
@@ -1188,6 +1216,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1236,8 +1265,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param contactID Unique identifier for a Contact
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createContactHistory (xeroTenantId: string, contactID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createContactHistory (xeroTenantId: string, contactID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/Contacts/{ContactID}/History'
             .replace('{' + 'ContactID' + '}', encodeURIComponent(String(contactID)));
         let localVarQueryParameters: any = {};
@@ -1260,6 +1290,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1307,9 +1338,10 @@ export class AccountingApi {
      * @summary Creates multiple contacts (bulk) in a Xero organisation
      * @param xeroTenantId Xero identifier for Tenant
      * @param contacts Contacts with an array of Contact objects to create in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async createContacts (xeroTenantId: string, contacts: Contacts, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Contacts;  }> {
+    public async createContacts (xeroTenantId: string, contacts: Contacts, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Contacts;  }> {
         const localVarPath = this.basePath + '/Contacts';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1330,6 +1362,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1378,9 +1411,10 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param creditNoteID Unique identifier for a Credit Note
      * @param allocations Allocations with array of Allocation object in body of request.
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async createCreditNoteAllocation (xeroTenantId: string, creditNoteID: string, allocations: Allocations, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Allocations;  }> {
+    public async createCreditNoteAllocation (xeroTenantId: string, creditNoteID: string, allocations: Allocations, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Allocations;  }> {
         const localVarPath = this.basePath + '/CreditNotes/{CreditNoteID}/Allocations'
             .replace('{' + 'CreditNoteID' + '}', encodeURIComponent(String(creditNoteID)));
         let localVarQueryParameters: any = {};
@@ -1407,6 +1441,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1456,9 +1491,10 @@ export class AccountingApi {
      * @param creditNoteID Unique identifier for a Credit Note
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param includeOnline Allows an attachment to be seen by the end customer within their online invoice
      */     
-    public async createCreditNoteAttachmentByFileName (xeroTenantId: string, creditNoteID: string, fileName: string, body: fs.ReadStream, includeOnline?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async createCreditNoteAttachmentByFileName (xeroTenantId: string, creditNoteID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, includeOnline?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/CreditNotes/{CreditNoteID}/Attachments/{FileName}'
             .replace('{' + 'CreditNoteID' + '}', encodeURIComponent(String(creditNoteID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -1492,6 +1528,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1561,8 +1598,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param creditNoteID Unique identifier for a Credit Note
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createCreditNoteHistory (xeroTenantId: string, creditNoteID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createCreditNoteHistory (xeroTenantId: string, creditNoteID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/CreditNotes/{CreditNoteID}/History'
             .replace('{' + 'CreditNoteID' + '}', encodeURIComponent(String(creditNoteID)));
         let localVarQueryParameters: any = {};
@@ -1585,6 +1623,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1632,10 +1671,11 @@ export class AccountingApi {
      * @summary Creates a new credit note
      * @param xeroTenantId Xero identifier for Tenant
      * @param creditNotes Credit Notes with array of CreditNote object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      * @param unitdp e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
      */     
-    public async createCreditNotes (xeroTenantId: string, creditNotes: CreditNotes, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: CreditNotes;  }> {
+    public async createCreditNotes (xeroTenantId: string, creditNotes: CreditNotes, idempotencyKey?: string, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: CreditNotes;  }> {
         const localVarPath = this.basePath + '/CreditNotes';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1660,6 +1700,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1707,8 +1748,9 @@ export class AccountingApi {
      * @summary Create a new currency for a Xero organisation
      * @param xeroTenantId Xero identifier for Tenant
      * @param currency Currency object in the body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createCurrency (xeroTenantId: string, currency: Currency, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Currencies;  }> {
+    public async createCurrency (xeroTenantId: string, currency: Currency, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Currencies;  }> {
         const localVarPath = this.basePath + '/Currencies';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1725,6 +1767,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1772,9 +1815,10 @@ export class AccountingApi {
      * @summary Creates new employees used in Xero payrun
      * @param xeroTenantId Xero identifier for Tenant
      * @param employees Employees with array of Employee object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async createEmployees (xeroTenantId: string, employees: Employees, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Employees;  }> {
+    public async createEmployees (xeroTenantId: string, employees: Employees, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Employees;  }> {
         const localVarPath = this.basePath + '/Employees';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1795,6 +1839,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1843,8 +1888,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param expenseClaimID Unique identifier for a ExpenseClaim
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createExpenseClaimHistory (xeroTenantId: string, expenseClaimID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createExpenseClaimHistory (xeroTenantId: string, expenseClaimID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/ExpenseClaims/{ExpenseClaimID}/History'
             .replace('{' + 'ExpenseClaimID' + '}', encodeURIComponent(String(expenseClaimID)));
         let localVarQueryParameters: any = {};
@@ -1867,6 +1913,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1914,8 +1961,9 @@ export class AccountingApi {
      * @summary Creates expense claims
      * @param xeroTenantId Xero identifier for Tenant
      * @param expenseClaims ExpenseClaims with array of ExpenseClaim object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createExpenseClaims (xeroTenantId: string, expenseClaims: ExpenseClaims, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ExpenseClaims;  }> {
+    public async createExpenseClaims (xeroTenantId: string, expenseClaims: ExpenseClaims, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ExpenseClaims;  }> {
         const localVarPath = this.basePath + '/ExpenseClaims';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1932,6 +1980,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1981,9 +2030,10 @@ export class AccountingApi {
      * @param invoiceID Unique identifier for an Invoice
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param includeOnline Allows an attachment to be seen by the end customer within their online invoice
      */     
-    public async createInvoiceAttachmentByFileName (xeroTenantId: string, invoiceID: string, fileName: string, body: fs.ReadStream, includeOnline?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async createInvoiceAttachmentByFileName (xeroTenantId: string, invoiceID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, includeOnline?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/Invoices/{InvoiceID}/Attachments/{FileName}'
             .replace('{' + 'InvoiceID' + '}', encodeURIComponent(String(invoiceID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -2017,6 +2067,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2086,8 +2137,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param invoiceID Unique identifier for an Invoice
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createInvoiceHistory (xeroTenantId: string, invoiceID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createInvoiceHistory (xeroTenantId: string, invoiceID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/Invoices/{InvoiceID}/History'
             .replace('{' + 'InvoiceID' + '}', encodeURIComponent(String(invoiceID)));
         let localVarQueryParameters: any = {};
@@ -2110,6 +2162,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2157,10 +2210,11 @@ export class AccountingApi {
      * @summary Creates one or more sales invoices or purchase bills
      * @param xeroTenantId Xero identifier for Tenant
      * @param invoices Invoices with an array of invoice objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      * @param unitdp e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
      */     
-    public async createInvoices (xeroTenantId: string, invoices: Invoices, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Invoices;  }> {
+    public async createInvoices (xeroTenantId: string, invoices: Invoices, idempotencyKey?: string, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Invoices;  }> {
         const localVarPath = this.basePath + '/Invoices';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -2185,6 +2239,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2233,8 +2288,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param itemID Unique identifier for an Item
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createItemHistory (xeroTenantId: string, itemID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createItemHistory (xeroTenantId: string, itemID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/Items/{ItemID}/History'
             .replace('{' + 'ItemID' + '}', encodeURIComponent(String(itemID)));
         let localVarQueryParameters: any = {};
@@ -2257,6 +2313,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2304,10 +2361,11 @@ export class AccountingApi {
      * @summary Creates one or more items
      * @param xeroTenantId Xero identifier for Tenant
      * @param items Items with an array of Item objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      * @param unitdp e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
      */     
-    public async createItems (xeroTenantId: string, items: Items, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Items;  }> {
+    public async createItems (xeroTenantId: string, items: Items, idempotencyKey?: string, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Items;  }> {
         const localVarPath = this.basePath + '/Items';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -2332,6 +2390,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2379,8 +2438,9 @@ export class AccountingApi {
      * @summary Creates linked transactions (billable expenses)
      * @param xeroTenantId Xero identifier for Tenant
      * @param linkedTransaction LinkedTransaction object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createLinkedTransaction (xeroTenantId: string, linkedTransaction: LinkedTransaction, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LinkedTransactions;  }> {
+    public async createLinkedTransaction (xeroTenantId: string, linkedTransaction: LinkedTransaction, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LinkedTransactions;  }> {
         const localVarPath = this.basePath + '/LinkedTransactions';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -2397,6 +2457,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2446,8 +2507,9 @@ export class AccountingApi {
      * @param manualJournalID Unique identifier for a ManualJournal
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createManualJournalAttachmentByFileName (xeroTenantId: string, manualJournalID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async createManualJournalAttachmentByFileName (xeroTenantId: string, manualJournalID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/ManualJournals/{ManualJournalID}/Attachments/{FileName}'
             .replace('{' + 'ManualJournalID' + '}', encodeURIComponent(String(manualJournalID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -2477,6 +2539,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2546,8 +2609,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param manualJournalID Unique identifier for a ManualJournal
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createManualJournalHistoryRecord (xeroTenantId: string, manualJournalID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createManualJournalHistoryRecord (xeroTenantId: string, manualJournalID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/ManualJournals/{ManualJournalID}/History'
             .replace('{' + 'ManualJournalID' + '}', encodeURIComponent(String(manualJournalID)));
         let localVarQueryParameters: any = {};
@@ -2570,6 +2634,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2617,9 +2682,10 @@ export class AccountingApi {
      * @summary Creates one or more manual journals
      * @param xeroTenantId Xero identifier for Tenant
      * @param manualJournals ManualJournals array with ManualJournal object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async createManualJournals (xeroTenantId: string, manualJournals: ManualJournals, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ManualJournals;  }> {
+    public async createManualJournals (xeroTenantId: string, manualJournals: ManualJournals, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ManualJournals;  }> {
         const localVarPath = this.basePath + '/ManualJournals';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -2640,6 +2706,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2688,9 +2755,10 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param overpaymentID Unique identifier for a Overpayment
      * @param allocations Allocations array with Allocation object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async createOverpaymentAllocations (xeroTenantId: string, overpaymentID: string, allocations: Allocations, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Allocations;  }> {
+    public async createOverpaymentAllocations (xeroTenantId: string, overpaymentID: string, allocations: Allocations, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Allocations;  }> {
         const localVarPath = this.basePath + '/Overpayments/{OverpaymentID}/Allocations'
             .replace('{' + 'OverpaymentID' + '}', encodeURIComponent(String(overpaymentID)));
         let localVarQueryParameters: any = {};
@@ -2717,6 +2785,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2765,8 +2834,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param overpaymentID Unique identifier for a Overpayment
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createOverpaymentHistory (xeroTenantId: string, overpaymentID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createOverpaymentHistory (xeroTenantId: string, overpaymentID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/Overpayments/{OverpaymentID}/History'
             .replace('{' + 'OverpaymentID' + '}', encodeURIComponent(String(overpaymentID)));
         let localVarQueryParameters: any = {};
@@ -2789,6 +2859,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2836,8 +2907,9 @@ export class AccountingApi {
      * @summary Creates a single payment for invoice or credit notes
      * @param xeroTenantId Xero identifier for Tenant
      * @param payment Request body with a single Payment object
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createPayment (xeroTenantId: string, payment: Payment, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Payments;  }> {
+    public async createPayment (xeroTenantId: string, payment: Payment, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Payments;  }> {
         const localVarPath = this.basePath + '/Payments';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -2854,6 +2926,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2902,8 +2975,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param paymentID Unique identifier for a Payment
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createPaymentHistory (xeroTenantId: string, paymentID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createPaymentHistory (xeroTenantId: string, paymentID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/Payments/{PaymentID}/History'
             .replace('{' + 'PaymentID' + '}', encodeURIComponent(String(paymentID)));
         let localVarQueryParameters: any = {};
@@ -2926,6 +3000,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2973,8 +3048,9 @@ export class AccountingApi {
      * @summary Creates a payment service
      * @param xeroTenantId Xero identifier for Tenant
      * @param paymentServices PaymentServices array with PaymentService object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createPaymentService (xeroTenantId: string, paymentServices: PaymentServices, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PaymentServices;  }> {
+    public async createPaymentService (xeroTenantId: string, paymentServices: PaymentServices, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PaymentServices;  }> {
         const localVarPath = this.basePath + '/PaymentServices';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -2991,6 +3067,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -3038,9 +3115,10 @@ export class AccountingApi {
      * @summary Creates multiple payments for invoices or credit notes
      * @param xeroTenantId Xero identifier for Tenant
      * @param payments Payments array with Payment object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async createPayments (xeroTenantId: string, payments: Payments, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Payments;  }> {
+    public async createPayments (xeroTenantId: string, payments: Payments, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Payments;  }> {
         const localVarPath = this.basePath + '/Payments';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -3061,6 +3139,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -3109,9 +3188,10 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param prepaymentID Unique identifier for a PrePayment
      * @param allocations Allocations with an array of Allocation object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async createPrepaymentAllocations (xeroTenantId: string, prepaymentID: string, allocations: Allocations, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Allocations;  }> {
+    public async createPrepaymentAllocations (xeroTenantId: string, prepaymentID: string, allocations: Allocations, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Allocations;  }> {
         const localVarPath = this.basePath + '/Prepayments/{PrepaymentID}/Allocations'
             .replace('{' + 'PrepaymentID' + '}', encodeURIComponent(String(prepaymentID)));
         let localVarQueryParameters: any = {};
@@ -3138,6 +3218,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -3186,8 +3267,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param prepaymentID Unique identifier for a PrePayment
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createPrepaymentHistory (xeroTenantId: string, prepaymentID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createPrepaymentHistory (xeroTenantId: string, prepaymentID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/Prepayments/{PrepaymentID}/History'
             .replace('{' + 'PrepaymentID' + '}', encodeURIComponent(String(prepaymentID)));
         let localVarQueryParameters: any = {};
@@ -3210,6 +3292,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -3259,8 +3342,9 @@ export class AccountingApi {
      * @param purchaseOrderID Unique identifier for an Purchase Order
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createPurchaseOrderAttachmentByFileName (xeroTenantId: string, purchaseOrderID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async createPurchaseOrderAttachmentByFileName (xeroTenantId: string, purchaseOrderID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/PurchaseOrders/{PurchaseOrderID}/Attachments/{FileName}'
             .replace('{' + 'PurchaseOrderID' + '}', encodeURIComponent(String(purchaseOrderID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -3290,6 +3374,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -3359,8 +3444,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param purchaseOrderID Unique identifier for an Purchase Order
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createPurchaseOrderHistory (xeroTenantId: string, purchaseOrderID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createPurchaseOrderHistory (xeroTenantId: string, purchaseOrderID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/PurchaseOrders/{PurchaseOrderID}/History'
             .replace('{' + 'PurchaseOrderID' + '}', encodeURIComponent(String(purchaseOrderID)));
         let localVarQueryParameters: any = {};
@@ -3383,6 +3469,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -3430,9 +3517,10 @@ export class AccountingApi {
      * @summary Creates one or more purchase orders
      * @param xeroTenantId Xero identifier for Tenant
      * @param purchaseOrders PurchaseOrders with an array of PurchaseOrder object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async createPurchaseOrders (xeroTenantId: string, purchaseOrders: PurchaseOrders, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PurchaseOrders;  }> {
+    public async createPurchaseOrders (xeroTenantId: string, purchaseOrders: PurchaseOrders, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PurchaseOrders;  }> {
         const localVarPath = this.basePath + '/PurchaseOrders';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -3453,6 +3541,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -3502,8 +3591,9 @@ export class AccountingApi {
      * @param quoteID Unique identifier for an Quote
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createQuoteAttachmentByFileName (xeroTenantId: string, quoteID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async createQuoteAttachmentByFileName (xeroTenantId: string, quoteID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/Quotes/{QuoteID}/Attachments/{FileName}'
             .replace('{' + 'QuoteID' + '}', encodeURIComponent(String(quoteID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -3533,6 +3623,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -3602,8 +3693,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param quoteID Unique identifier for an Quote
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createQuoteHistory (xeroTenantId: string, quoteID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createQuoteHistory (xeroTenantId: string, quoteID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/Quotes/{QuoteID}/History'
             .replace('{' + 'QuoteID' + '}', encodeURIComponent(String(quoteID)));
         let localVarQueryParameters: any = {};
@@ -3626,6 +3718,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -3673,9 +3766,10 @@ export class AccountingApi {
      * @summary Create one or more quotes
      * @param xeroTenantId Xero identifier for Tenant
      * @param quotes Quotes with an array of Quote object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async createQuotes (xeroTenantId: string, quotes: Quotes, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Quotes;  }> {
+    public async createQuotes (xeroTenantId: string, quotes: Quotes, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Quotes;  }> {
         const localVarPath = this.basePath + '/Quotes';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -3696,6 +3790,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -3743,9 +3838,10 @@ export class AccountingApi {
      * @summary Creates draft expense claim receipts for any user
      * @param xeroTenantId Xero identifier for Tenant
      * @param receipts Receipts with an array of Receipt object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param unitdp e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
      */     
-    public async createReceipt (xeroTenantId: string, receipts: Receipts, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Receipts;  }> {
+    public async createReceipt (xeroTenantId: string, receipts: Receipts, idempotencyKey?: string, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Receipts;  }> {
         const localVarPath = this.basePath + '/Receipts';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -3766,6 +3862,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -3815,8 +3912,9 @@ export class AccountingApi {
      * @param receiptID Unique identifier for a Receipt
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createReceiptAttachmentByFileName (xeroTenantId: string, receiptID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async createReceiptAttachmentByFileName (xeroTenantId: string, receiptID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/Receipts/{ReceiptID}/Attachments/{FileName}'
             .replace('{' + 'ReceiptID' + '}', encodeURIComponent(String(receiptID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -3846,6 +3944,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -3915,8 +4014,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param receiptID Unique identifier for a Receipt
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createReceiptHistory (xeroTenantId: string, receiptID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createReceiptHistory (xeroTenantId: string, receiptID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/Receipts/{ReceiptID}/History'
             .replace('{' + 'ReceiptID' + '}', encodeURIComponent(String(receiptID)));
         let localVarQueryParameters: any = {};
@@ -3939,6 +4039,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -3988,8 +4089,9 @@ export class AccountingApi {
      * @param repeatingInvoiceID Unique identifier for a Repeating Invoice
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createRepeatingInvoiceAttachmentByFileName (xeroTenantId: string, repeatingInvoiceID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async createRepeatingInvoiceAttachmentByFileName (xeroTenantId: string, repeatingInvoiceID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/RepeatingInvoices/{RepeatingInvoiceID}/Attachments/{FileName}'
             .replace('{' + 'RepeatingInvoiceID' + '}', encodeURIComponent(String(repeatingInvoiceID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -4019,6 +4121,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4088,8 +4191,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param repeatingInvoiceID Unique identifier for a Repeating Invoice
      * @param historyRecords HistoryRecords containing an array of HistoryRecord objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createRepeatingInvoiceHistory (xeroTenantId: string, repeatingInvoiceID: string, historyRecords: HistoryRecords, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
+    public async createRepeatingInvoiceHistory (xeroTenantId: string, repeatingInvoiceID: string, historyRecords: HistoryRecords, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: HistoryRecords;  }> {
         const localVarPath = this.basePath + '/RepeatingInvoices/{RepeatingInvoiceID}/History'
             .replace('{' + 'RepeatingInvoiceID' + '}', encodeURIComponent(String(repeatingInvoiceID)));
         let localVarQueryParameters: any = {};
@@ -4112,6 +4216,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4159,9 +4264,10 @@ export class AccountingApi {
      * @summary Creates one or more repeating invoice templates
      * @param xeroTenantId Xero identifier for Tenant
      * @param repeatingInvoices RepeatingInvoices with an array of repeating invoice objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async createRepeatingInvoices (xeroTenantId: string, repeatingInvoices: RepeatingInvoices, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: RepeatingInvoices;  }> {
+    public async createRepeatingInvoices (xeroTenantId: string, repeatingInvoices: RepeatingInvoices, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: RepeatingInvoices;  }> {
         const localVarPath = this.basePath + '/RepeatingInvoices';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -4182,6 +4288,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4229,8 +4336,9 @@ export class AccountingApi {
      * @summary Creates one or more tax rates
      * @param xeroTenantId Xero identifier for Tenant
      * @param taxRates TaxRates array with TaxRate object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createTaxRates (xeroTenantId: string, taxRates: TaxRates, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TaxRates;  }> {
+    public async createTaxRates (xeroTenantId: string, taxRates: TaxRates, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TaxRates;  }> {
         const localVarPath = this.basePath + '/TaxRates';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -4247,6 +4355,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4294,8 +4403,9 @@ export class AccountingApi {
      * @summary Create tracking categories
      * @param xeroTenantId Xero identifier for Tenant
      * @param trackingCategory TrackingCategory object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createTrackingCategory (xeroTenantId: string, trackingCategory: TrackingCategory, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TrackingCategories;  }> {
+    public async createTrackingCategory (xeroTenantId: string, trackingCategory: TrackingCategory, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TrackingCategories;  }> {
         const localVarPath = this.basePath + '/TrackingCategories';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -4312,6 +4422,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4360,8 +4471,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param trackingCategoryID Unique identifier for a TrackingCategory
      * @param trackingOption TrackingOption object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createTrackingOptions (xeroTenantId: string, trackingCategoryID: string, trackingOption: TrackingOption, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TrackingOptions;  }> {
+    public async createTrackingOptions (xeroTenantId: string, trackingCategoryID: string, trackingOption: TrackingOption, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TrackingOptions;  }> {
         const localVarPath = this.basePath + '/TrackingCategories/{TrackingCategoryID}/Options'
             .replace('{' + 'TrackingCategoryID' + '}', encodeURIComponent(String(trackingCategoryID)));
         let localVarQueryParameters: any = {};
@@ -4384,6 +4496,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4496,8 +4609,9 @@ export class AccountingApi {
      * @summary Updates a specific batch payment for invoices and credit notes
      * @param xeroTenantId Xero identifier for Tenant
      * @param batchPaymentDelete 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async deleteBatchPayment (xeroTenantId: string, batchPaymentDelete: BatchPaymentDelete, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BatchPayments;  }> {
+    public async deleteBatchPayment (xeroTenantId: string, batchPaymentDelete: BatchPaymentDelete, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BatchPayments;  }> {
         const localVarPath = this.basePath + '/BatchPayments';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -4514,6 +4628,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4562,8 +4677,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param batchPaymentID Unique identifier for BatchPayment
      * @param batchPaymentDeleteByUrlParam 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async deleteBatchPaymentByUrlParam (xeroTenantId: string, batchPaymentID: string, batchPaymentDeleteByUrlParam: BatchPaymentDeleteByUrlParam, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BatchPayments;  }> {
+    public async deleteBatchPaymentByUrlParam (xeroTenantId: string, batchPaymentID: string, batchPaymentDeleteByUrlParam: BatchPaymentDeleteByUrlParam, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BatchPayments;  }> {
         const localVarPath = this.basePath + '/BatchPayments/{BatchPaymentID}'
             .replace('{' + 'BatchPaymentID' + '}', encodeURIComponent(String(batchPaymentID)));
         let localVarQueryParameters: any = {};
@@ -4586,6 +4702,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4765,6 +4882,78 @@ export class AccountingApi {
             });
         });
     }
+    /**
+     * 
+     * @summary Deletes an Allocation from a Credit Note
+     * @param xeroTenantId Xero identifier for Tenant
+     * @param creditNoteID Unique identifier for a Credit Note
+     * @param allocationID Unique identifier for Allocation object
+     */     
+    public async deleteCreditNoteAllocations (xeroTenantId: string, creditNoteID: string, allocationID: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Allocation;  }> {
+        const localVarPath = this.basePath + '/CreditNotes/{CreditNoteID}/Allocations/{AllocationID}'
+            .replace('{' + 'CreditNoteID' + '}', encodeURIComponent(String(creditNoteID)))
+            .replace('{' + 'AllocationID' + '}', encodeURIComponent(String(allocationID)));
+        let localVarQueryParameters: any = {};
+        let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
+        let localVarFormParams: any = {};
+
+        // verify required parameter 'xeroTenantId' is not null or undefined
+        if (xeroTenantId === null || xeroTenantId === undefined) {
+            throw new Error('Required parameter xeroTenantId was null or undefined when calling deleteCreditNoteAllocations.');
+        }
+
+        // verify required parameter 'creditNoteID' is not null or undefined
+        if (creditNoteID === null || creditNoteID === undefined) {
+            throw new Error('Required parameter creditNoteID was null or undefined when calling deleteCreditNoteAllocations.');
+        }
+
+        // verify required parameter 'allocationID' is not null or undefined
+        if (allocationID === null || allocationID === undefined) {
+            throw new Error('Required parameter allocationID was null or undefined when calling deleteCreditNoteAllocations.');
+        }
+
+        localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+
+        (<any>Object).assign(localVarHeaderParams, options.headers);
+        let localVarUseFormData = false;
+
+        let localVarRequestOptions: localVarRequest.Options = {
+            method: 'DELETE',
+            qs: localVarQueryParameters,
+            headers: localVarHeaderParams,
+            uri: localVarPath,
+            useQuerystring: this._useQuerystring,
+            json: true,
+        };
+
+        let authenticationPromise = Promise.resolve();
+        authenticationPromise = authenticationPromise.then(() => this.authentications.OAuth2.applyToRequest(localVarRequestOptions));
+
+        authenticationPromise = authenticationPromise.then(() => this.authentications.default.applyToRequest(localVarRequestOptions));
+        return authenticationPromise.then(() => {
+            if (Object.keys(localVarFormParams).length) {
+                if (localVarUseFormData) {
+                    (<any>localVarRequestOptions).formData = localVarFormParams;
+                } else {
+                    localVarRequestOptions.form = localVarFormParams;
+                }
+            }
+            return new Promise<{ response: http.IncomingMessage; body: Allocation;  }>((resolve, reject) => {
+                localVarRequest(localVarRequestOptions, (error, response, body) => {
+                    if (error) {
+                        reject(error);
+                    } else {
+                        body = ObjectSerializer.deserialize(body, "Allocation");
+                        if (response.statusCode && response.statusCode >= 200 && response.statusCode <= 299) {
+                            resolve({ response: response, body: body });
+                        } else {
+                            reject({ response: response, body: body });
+                        }
+                    }
+                });
+            });
+        });
+    }
     /**
      * 
      * @summary Deletes a specific item
@@ -4895,14 +5084,87 @@ export class AccountingApi {
             });
         });
     }
+    /**
+     * 
+     * @summary Deletes an Allocation from an overpayment
+     * @param xeroTenantId Xero identifier for Tenant
+     * @param overpaymentID Unique identifier for a Overpayment
+     * @param allocationID Unique identifier for Allocation object
+     */     
+    public async deleteOverpaymentAllocations (xeroTenantId: string, overpaymentID: string, allocationID: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Allocation;  }> {
+        const localVarPath = this.basePath + '/Overpayments/{OverpaymentID}/Allocations/{AllocationID}'
+            .replace('{' + 'OverpaymentID' + '}', encodeURIComponent(String(overpaymentID)))
+            .replace('{' + 'AllocationID' + '}', encodeURIComponent(String(allocationID)));
+        let localVarQueryParameters: any = {};
+        let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
+        let localVarFormParams: any = {};
+
+        // verify required parameter 'xeroTenantId' is not null or undefined
+        if (xeroTenantId === null || xeroTenantId === undefined) {
+            throw new Error('Required parameter xeroTenantId was null or undefined when calling deleteOverpaymentAllocations.');
+        }
+
+        // verify required parameter 'overpaymentID' is not null or undefined
+        if (overpaymentID === null || overpaymentID === undefined) {
+            throw new Error('Required parameter overpaymentID was null or undefined when calling deleteOverpaymentAllocations.');
+        }
+
+        // verify required parameter 'allocationID' is not null or undefined
+        if (allocationID === null || allocationID === undefined) {
+            throw new Error('Required parameter allocationID was null or undefined when calling deleteOverpaymentAllocations.');
+        }
+
+        localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+
+        (<any>Object).assign(localVarHeaderParams, options.headers);
+        let localVarUseFormData = false;
+
+        let localVarRequestOptions: localVarRequest.Options = {
+            method: 'DELETE',
+            qs: localVarQueryParameters,
+            headers: localVarHeaderParams,
+            uri: localVarPath,
+            useQuerystring: this._useQuerystring,
+            json: true,
+        };
+
+        let authenticationPromise = Promise.resolve();
+        authenticationPromise = authenticationPromise.then(() => this.authentications.OAuth2.applyToRequest(localVarRequestOptions));
+
+        authenticationPromise = authenticationPromise.then(() => this.authentications.default.applyToRequest(localVarRequestOptions));
+        return authenticationPromise.then(() => {
+            if (Object.keys(localVarFormParams).length) {
+                if (localVarUseFormData) {
+                    (<any>localVarRequestOptions).formData = localVarFormParams;
+                } else {
+                    localVarRequestOptions.form = localVarFormParams;
+                }
+            }
+            return new Promise<{ response: http.IncomingMessage; body: Allocation;  }>((resolve, reject) => {
+                localVarRequest(localVarRequestOptions, (error, response, body) => {
+                    if (error) {
+                        reject(error);
+                    } else {
+                        body = ObjectSerializer.deserialize(body, "Allocation");
+                        if (response.statusCode && response.statusCode >= 200 && response.statusCode <= 299) {
+                            resolve({ response: response, body: body });
+                        } else {
+                            reject({ response: response, body: body });
+                        }
+                    }
+                });
+            });
+        });
+    }
     /**
      * 
      * @summary Updates a specific payment for invoices and credit notes
      * @param xeroTenantId Xero identifier for Tenant
      * @param paymentID Unique identifier for a Payment
      * @param paymentDelete 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async deletePayment (xeroTenantId: string, paymentID: string, paymentDelete: PaymentDelete, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Payments;  }> {
+    public async deletePayment (xeroTenantId: string, paymentID: string, paymentDelete: PaymentDelete, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Payments;  }> {
         const localVarPath = this.basePath + '/Payments/{PaymentID}'
             .replace('{' + 'PaymentID' + '}', encodeURIComponent(String(paymentID)));
         let localVarQueryParameters: any = {};
@@ -4925,6 +5187,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4967,6 +5230,78 @@ export class AccountingApi {
             });
         });
     }
+    /**
+     * 
+     * @summary Deletes an Allocation from a Prepayment
+     * @param xeroTenantId Xero identifier for Tenant
+     * @param prepaymentID Unique identifier for a PrePayment
+     * @param allocationID Unique identifier for Allocation object
+     */     
+    public async deletePrepaymentAllocations (xeroTenantId: string, prepaymentID: string, allocationID: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Allocation;  }> {
+        const localVarPath = this.basePath + '/Prepayments/{PrepaymentID}/Allocations/{AllocationID}'
+            .replace('{' + 'PrepaymentID' + '}', encodeURIComponent(String(prepaymentID)))
+            .replace('{' + 'AllocationID' + '}', encodeURIComponent(String(allocationID)));
+        let localVarQueryParameters: any = {};
+        let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
+        let localVarFormParams: any = {};
+
+        // verify required parameter 'xeroTenantId' is not null or undefined
+        if (xeroTenantId === null || xeroTenantId === undefined) {
+            throw new Error('Required parameter xeroTenantId was null or undefined when calling deletePrepaymentAllocations.');
+        }
+
+        // verify required parameter 'prepaymentID' is not null or undefined
+        if (prepaymentID === null || prepaymentID === undefined) {
+            throw new Error('Required parameter prepaymentID was null or undefined when calling deletePrepaymentAllocations.');
+        }
+
+        // verify required parameter 'allocationID' is not null or undefined
+        if (allocationID === null || allocationID === undefined) {
+            throw new Error('Required parameter allocationID was null or undefined when calling deletePrepaymentAllocations.');
+        }
+
+        localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+
+        (<any>Object).assign(localVarHeaderParams, options.headers);
+        let localVarUseFormData = false;
+
+        let localVarRequestOptions: localVarRequest.Options = {
+            method: 'DELETE',
+            qs: localVarQueryParameters,
+            headers: localVarHeaderParams,
+            uri: localVarPath,
+            useQuerystring: this._useQuerystring,
+            json: true,
+        };
+
+        let authenticationPromise = Promise.resolve();
+        authenticationPromise = authenticationPromise.then(() => this.authentications.OAuth2.applyToRequest(localVarRequestOptions));
+
+        authenticationPromise = authenticationPromise.then(() => this.authentications.default.applyToRequest(localVarRequestOptions));
+        return authenticationPromise.then(() => {
+            if (Object.keys(localVarFormParams).length) {
+                if (localVarUseFormData) {
+                    (<any>localVarRequestOptions).formData = localVarFormParams;
+                } else {
+                    localVarRequestOptions.form = localVarFormParams;
+                }
+            }
+            return new Promise<{ response: http.IncomingMessage; body: Allocation;  }>((resolve, reject) => {
+                localVarRequest(localVarRequestOptions, (error, response, body) => {
+                    if (error) {
+                        reject(error);
+                    } else {
+                        body = ObjectSerializer.deserialize(body, "Allocation");
+                        if (response.statusCode && response.statusCode >= 200 && response.statusCode <= 299) {
+                            resolve({ response: response, body: body });
+                        } else {
+                            reject({ response: response, body: body });
+                        }
+                    }
+                });
+            });
+        });
+    }
     /**
      * 
      * @summary Deletes a specific tracking category
@@ -5110,8 +5445,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param invoiceID Unique identifier for an Invoice
      * @param requestEmpty 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async emailInvoice (xeroTenantId: string, invoiceID: string, requestEmpty: RequestEmpty, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body?: any;  }> {
+    public async emailInvoice (xeroTenantId: string, invoiceID: string, requestEmpty: RequestEmpty, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body?: any;  }> {
         const localVarPath = this.basePath + '/Invoices/{InvoiceID}/Email'
             .replace('{' + 'InvoiceID' + '}', encodeURIComponent(String(invoiceID)));
         let localVarQueryParameters: any = {};
@@ -5134,6 +5470,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -14229,8 +14566,9 @@ export class AccountingApi {
      * @summary Sets the chart of accounts, the conversion date and conversion balances
      * @param xeroTenantId Xero identifier for Tenant
      * @param setup Object including an accounts array, a conversion balances array and a conversion date object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async postSetup (xeroTenantId: string, setup: Setup, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ImportSummaryObject;  }> {
+    public async postSetup (xeroTenantId: string, setup: Setup, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ImportSummaryObject;  }> {
         const localVarPath = this.basePath + '/Setup';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -14247,6 +14585,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -14295,8 +14634,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param accountID Unique identifier for Account object
      * @param accounts Request of type Accounts array with one Account
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateAccount (xeroTenantId: string, accountID: string, accounts: Accounts, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Accounts;  }> {
+    public async updateAccount (xeroTenantId: string, accountID: string, accounts: Accounts, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Accounts;  }> {
         const localVarPath = this.basePath + '/Accounts/{AccountID}'
             .replace('{' + 'AccountID' + '}', encodeURIComponent(String(accountID)));
         let localVarQueryParameters: any = {};
@@ -14319,6 +14659,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -14368,8 +14709,9 @@ export class AccountingApi {
      * @param accountID Unique identifier for Account object
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateAccountAttachmentByFileName (xeroTenantId: string, accountID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async updateAccountAttachmentByFileName (xeroTenantId: string, accountID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/Accounts/{AccountID}/Attachments/{FileName}'
             .replace('{' + 'AccountID' + '}', encodeURIComponent(String(accountID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -14399,6 +14741,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -14468,9 +14811,10 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param bankTransactionID Xero generated unique identifier for a bank transaction
      * @param bankTransactions 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param unitdp e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
      */     
-    public async updateBankTransaction (xeroTenantId: string, bankTransactionID: string, bankTransactions: BankTransactions, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BankTransactions;  }> {
+    public async updateBankTransaction (xeroTenantId: string, bankTransactionID: string, bankTransactions: BankTransactions, idempotencyKey?: string, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BankTransactions;  }> {
         const localVarPath = this.basePath + '/BankTransactions/{BankTransactionID}'
             .replace('{' + 'BankTransactionID' + '}', encodeURIComponent(String(bankTransactionID)));
         let localVarQueryParameters: any = {};
@@ -14497,6 +14841,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -14546,8 +14891,9 @@ export class AccountingApi {
      * @param bankTransactionID Xero generated unique identifier for a bank transaction
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateBankTransactionAttachmentByFileName (xeroTenantId: string, bankTransactionID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async updateBankTransactionAttachmentByFileName (xeroTenantId: string, bankTransactionID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/BankTransactions/{BankTransactionID}/Attachments/{FileName}'
             .replace('{' + 'BankTransactionID' + '}', encodeURIComponent(String(bankTransactionID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -14577,6 +14923,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -14646,8 +14993,9 @@ export class AccountingApi {
      * @param bankTransferID Xero generated unique identifier for a bank transfer
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateBankTransferAttachmentByFileName (xeroTenantId: string, bankTransferID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async updateBankTransferAttachmentByFileName (xeroTenantId: string, bankTransferID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/BankTransfers/{BankTransferID}/Attachments/{FileName}'
             .replace('{' + 'BankTransferID' + '}', encodeURIComponent(String(bankTransferID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -14677,6 +15025,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -14746,8 +15095,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param contactID Unique identifier for a Contact
      * @param contacts an array of Contacts containing single Contact object with properties to update
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateContact (xeroTenantId: string, contactID: string, contacts: Contacts, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Contacts;  }> {
+    public async updateContact (xeroTenantId: string, contactID: string, contacts: Contacts, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Contacts;  }> {
         const localVarPath = this.basePath + '/Contacts/{ContactID}'
             .replace('{' + 'ContactID' + '}', encodeURIComponent(String(contactID)));
         let localVarQueryParameters: any = {};
@@ -14770,6 +15120,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -14818,8 +15169,9 @@ export class AccountingApi {
      * @param contactID Unique identifier for a Contact
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateContactAttachmentByFileName (xeroTenantId: string, contactID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async updateContactAttachmentByFileName (xeroTenantId: string, contactID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/Contacts/{ContactID}/Attachments/{FileName}'
             .replace('{' + 'ContactID' + '}', encodeURIComponent(String(contactID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -14849,6 +15201,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -14918,8 +15271,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param contactGroupID Unique identifier for a Contact Group
      * @param contactGroups an array of Contact groups with Name of specific group to update
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateContactGroup (xeroTenantId: string, contactGroupID: string, contactGroups: ContactGroups, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ContactGroups;  }> {
+    public async updateContactGroup (xeroTenantId: string, contactGroupID: string, contactGroups: ContactGroups, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ContactGroups;  }> {
         const localVarPath = this.basePath + '/ContactGroups/{ContactGroupID}'
             .replace('{' + 'ContactGroupID' + '}', encodeURIComponent(String(contactGroupID)));
         let localVarQueryParameters: any = {};
@@ -14942,6 +15296,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -14990,9 +15345,10 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param creditNoteID Unique identifier for a Credit Note
      * @param creditNotes an array of Credit Notes containing credit note details to update
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param unitdp e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
      */     
-    public async updateCreditNote (xeroTenantId: string, creditNoteID: string, creditNotes: CreditNotes, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: CreditNotes;  }> {
+    public async updateCreditNote (xeroTenantId: string, creditNoteID: string, creditNotes: CreditNotes, idempotencyKey?: string, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: CreditNotes;  }> {
         const localVarPath = this.basePath + '/CreditNotes/{CreditNoteID}'
             .replace('{' + 'CreditNoteID' + '}', encodeURIComponent(String(creditNoteID)));
         let localVarQueryParameters: any = {};
@@ -15019,6 +15375,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -15068,8 +15425,9 @@ export class AccountingApi {
      * @param creditNoteID Unique identifier for a Credit Note
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateCreditNoteAttachmentByFileName (xeroTenantId: string, creditNoteID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async updateCreditNoteAttachmentByFileName (xeroTenantId: string, creditNoteID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/CreditNotes/{CreditNoteID}/Attachments/{FileName}'
             .replace('{' + 'CreditNoteID' + '}', encodeURIComponent(String(creditNoteID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -15099,6 +15457,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -15168,8 +15527,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param expenseClaimID Unique identifier for a ExpenseClaim
      * @param expenseClaims 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateExpenseClaim (xeroTenantId: string, expenseClaimID: string, expenseClaims: ExpenseClaims, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ExpenseClaims;  }> {
+    public async updateExpenseClaim (xeroTenantId: string, expenseClaimID: string, expenseClaims: ExpenseClaims, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ExpenseClaims;  }> {
         const localVarPath = this.basePath + '/ExpenseClaims/{ExpenseClaimID}'
             .replace('{' + 'ExpenseClaimID' + '}', encodeURIComponent(String(expenseClaimID)));
         let localVarQueryParameters: any = {};
@@ -15192,6 +15552,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -15240,9 +15601,10 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param invoiceID Unique identifier for an Invoice
      * @param invoices 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param unitdp e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
      */     
-    public async updateInvoice (xeroTenantId: string, invoiceID: string, invoices: Invoices, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Invoices;  }> {
+    public async updateInvoice (xeroTenantId: string, invoiceID: string, invoices: Invoices, idempotencyKey?: string, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Invoices;  }> {
         const localVarPath = this.basePath + '/Invoices/{InvoiceID}'
             .replace('{' + 'InvoiceID' + '}', encodeURIComponent(String(invoiceID)));
         let localVarQueryParameters: any = {};
@@ -15269,6 +15631,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -15318,8 +15681,9 @@ export class AccountingApi {
      * @param invoiceID Unique identifier for an Invoice
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateInvoiceAttachmentByFileName (xeroTenantId: string, invoiceID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async updateInvoiceAttachmentByFileName (xeroTenantId: string, invoiceID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/Invoices/{InvoiceID}/Attachments/{FileName}'
             .replace('{' + 'InvoiceID' + '}', encodeURIComponent(String(invoiceID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -15349,6 +15713,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -15418,9 +15783,10 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param itemID Unique identifier for an Item
      * @param items 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param unitdp e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
      */     
-    public async updateItem (xeroTenantId: string, itemID: string, items: Items, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Items;  }> {
+    public async updateItem (xeroTenantId: string, itemID: string, items: Items, idempotencyKey?: string, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Items;  }> {
         const localVarPath = this.basePath + '/Items/{ItemID}'
             .replace('{' + 'ItemID' + '}', encodeURIComponent(String(itemID)));
         let localVarQueryParameters: any = {};
@@ -15447,6 +15813,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -15495,8 +15862,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param linkedTransactionID Unique identifier for a LinkedTransaction
      * @param linkedTransactions 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateLinkedTransaction (xeroTenantId: string, linkedTransactionID: string, linkedTransactions: LinkedTransactions, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LinkedTransactions;  }> {
+    public async updateLinkedTransaction (xeroTenantId: string, linkedTransactionID: string, linkedTransactions: LinkedTransactions, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LinkedTransactions;  }> {
         const localVarPath = this.basePath + '/LinkedTransactions/{LinkedTransactionID}'
             .replace('{' + 'LinkedTransactionID' + '}', encodeURIComponent(String(linkedTransactionID)));
         let localVarQueryParameters: any = {};
@@ -15519,6 +15887,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -15567,8 +15936,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param manualJournalID Unique identifier for a ManualJournal
      * @param manualJournals 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateManualJournal (xeroTenantId: string, manualJournalID: string, manualJournals: ManualJournals, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ManualJournals;  }> {
+    public async updateManualJournal (xeroTenantId: string, manualJournalID: string, manualJournals: ManualJournals, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ManualJournals;  }> {
         const localVarPath = this.basePath + '/ManualJournals/{ManualJournalID}'
             .replace('{' + 'ManualJournalID' + '}', encodeURIComponent(String(manualJournalID)));
         let localVarQueryParameters: any = {};
@@ -15591,6 +15961,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -15640,8 +16011,9 @@ export class AccountingApi {
      * @param manualJournalID Unique identifier for a ManualJournal
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateManualJournalAttachmentByFileName (xeroTenantId: string, manualJournalID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async updateManualJournalAttachmentByFileName (xeroTenantId: string, manualJournalID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/ManualJournals/{ManualJournalID}/Attachments/{FileName}'
             .replace('{' + 'ManualJournalID' + '}', encodeURIComponent(String(manualJournalID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -15671,6 +16043,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -15739,10 +16112,11 @@ export class AccountingApi {
      * @summary Updates or creates one or more spent or received money transaction
      * @param xeroTenantId Xero identifier for Tenant
      * @param bankTransactions 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      * @param unitdp e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
      */     
-    public async updateOrCreateBankTransactions (xeroTenantId: string, bankTransactions: BankTransactions, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BankTransactions;  }> {
+    public async updateOrCreateBankTransactions (xeroTenantId: string, bankTransactions: BankTransactions, idempotencyKey?: string, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BankTransactions;  }> {
         const localVarPath = this.basePath + '/BankTransactions';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -15767,6 +16141,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -15814,9 +16189,10 @@ export class AccountingApi {
      * @summary Updates or creates one or more contacts in a Xero organisation
      * @param xeroTenantId Xero identifier for Tenant
      * @param contacts 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async updateOrCreateContacts (xeroTenantId: string, contacts: Contacts, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Contacts;  }> {
+    public async updateOrCreateContacts (xeroTenantId: string, contacts: Contacts, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Contacts;  }> {
         const localVarPath = this.basePath + '/Contacts';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -15837,6 +16213,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -15884,10 +16261,11 @@ export class AccountingApi {
      * @summary Updates or creates one or more credit notes
      * @param xeroTenantId Xero identifier for Tenant
      * @param creditNotes an array of Credit Notes with a single CreditNote object.
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      * @param unitdp e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
      */     
-    public async updateOrCreateCreditNotes (xeroTenantId: string, creditNotes: CreditNotes, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: CreditNotes;  }> {
+    public async updateOrCreateCreditNotes (xeroTenantId: string, creditNotes: CreditNotes, idempotencyKey?: string, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: CreditNotes;  }> {
         const localVarPath = this.basePath + '/CreditNotes';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -15912,6 +16290,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -15959,9 +16338,10 @@ export class AccountingApi {
      * @summary Creates a single new employees used in Xero payrun
      * @param xeroTenantId Xero identifier for Tenant
      * @param employees Employees with array of Employee object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async updateOrCreateEmployees (xeroTenantId: string, employees: Employees, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Employees;  }> {
+    public async updateOrCreateEmployees (xeroTenantId: string, employees: Employees, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Employees;  }> {
         const localVarPath = this.basePath + '/Employees';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -15982,6 +16362,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -16029,10 +16410,11 @@ export class AccountingApi {
      * @summary Updates or creates one or more sales invoices or purchase bills
      * @param xeroTenantId Xero identifier for Tenant
      * @param invoices 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      * @param unitdp e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
      */     
-    public async updateOrCreateInvoices (xeroTenantId: string, invoices: Invoices, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Invoices;  }> {
+    public async updateOrCreateInvoices (xeroTenantId: string, invoices: Invoices, idempotencyKey?: string, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Invoices;  }> {
         const localVarPath = this.basePath + '/Invoices';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -16057,6 +16439,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -16104,10 +16487,11 @@ export class AccountingApi {
      * @summary Updates or creates one or more items
      * @param xeroTenantId Xero identifier for Tenant
      * @param items 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      * @param unitdp e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
      */     
-    public async updateOrCreateItems (xeroTenantId: string, items: Items, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Items;  }> {
+    public async updateOrCreateItems (xeroTenantId: string, items: Items, idempotencyKey?: string, summarizeErrors?: boolean, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Items;  }> {
         const localVarPath = this.basePath + '/Items';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -16132,6 +16516,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -16179,9 +16564,10 @@ export class AccountingApi {
      * @summary Updates or creates a single manual journal
      * @param xeroTenantId Xero identifier for Tenant
      * @param manualJournals ManualJournals array with ManualJournal object in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async updateOrCreateManualJournals (xeroTenantId: string, manualJournals: ManualJournals, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ManualJournals;  }> {
+    public async updateOrCreateManualJournals (xeroTenantId: string, manualJournals: ManualJournals, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ManualJournals;  }> {
         const localVarPath = this.basePath + '/ManualJournals';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -16202,6 +16588,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -16249,9 +16636,10 @@ export class AccountingApi {
      * @summary Updates or creates one or more purchase orders
      * @param xeroTenantId Xero identifier for Tenant
      * @param purchaseOrders 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async updateOrCreatePurchaseOrders (xeroTenantId: string, purchaseOrders: PurchaseOrders, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PurchaseOrders;  }> {
+    public async updateOrCreatePurchaseOrders (xeroTenantId: string, purchaseOrders: PurchaseOrders, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PurchaseOrders;  }> {
         const localVarPath = this.basePath + '/PurchaseOrders';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -16272,6 +16660,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -16319,9 +16708,10 @@ export class AccountingApi {
      * @summary Updates or creates one or more quotes
      * @param xeroTenantId Xero identifier for Tenant
      * @param quotes 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async updateOrCreateQuotes (xeroTenantId: string, quotes: Quotes, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Quotes;  }> {
+    public async updateOrCreateQuotes (xeroTenantId: string, quotes: Quotes, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Quotes;  }> {
         const localVarPath = this.basePath + '/Quotes';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -16342,6 +16732,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -16389,9 +16780,10 @@ export class AccountingApi {
      * @summary Creates or deletes one or more repeating invoice templates
      * @param xeroTenantId Xero identifier for Tenant
      * @param repeatingInvoices RepeatingInvoices with an array of repeating invoice objects in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param summarizeErrors If false return 200 OK and mix of successfully created objects and any with validation errors
      */     
-    public async updateOrCreateRepeatingInvoices (xeroTenantId: string, repeatingInvoices: RepeatingInvoices, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: RepeatingInvoices;  }> {
+    public async updateOrCreateRepeatingInvoices (xeroTenantId: string, repeatingInvoices: RepeatingInvoices, idempotencyKey?: string, summarizeErrors?: boolean, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: RepeatingInvoices;  }> {
         const localVarPath = this.basePath + '/RepeatingInvoices';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -16412,6 +16804,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -16460,8 +16853,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param purchaseOrderID Unique identifier for an Purchase Order
      * @param purchaseOrders 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updatePurchaseOrder (xeroTenantId: string, purchaseOrderID: string, purchaseOrders: PurchaseOrders, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PurchaseOrders;  }> {
+    public async updatePurchaseOrder (xeroTenantId: string, purchaseOrderID: string, purchaseOrders: PurchaseOrders, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PurchaseOrders;  }> {
         const localVarPath = this.basePath + '/PurchaseOrders/{PurchaseOrderID}'
             .replace('{' + 'PurchaseOrderID' + '}', encodeURIComponent(String(purchaseOrderID)));
         let localVarQueryParameters: any = {};
@@ -16484,6 +16878,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -16533,8 +16928,9 @@ export class AccountingApi {
      * @param purchaseOrderID Unique identifier for an Purchase Order
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updatePurchaseOrderAttachmentByFileName (xeroTenantId: string, purchaseOrderID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async updatePurchaseOrderAttachmentByFileName (xeroTenantId: string, purchaseOrderID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/PurchaseOrders/{PurchaseOrderID}/Attachments/{FileName}'
             .replace('{' + 'PurchaseOrderID' + '}', encodeURIComponent(String(purchaseOrderID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -16564,6 +16960,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -16633,8 +17030,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param quoteID Unique identifier for an Quote
      * @param quotes 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateQuote (xeroTenantId: string, quoteID: string, quotes: Quotes, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Quotes;  }> {
+    public async updateQuote (xeroTenantId: string, quoteID: string, quotes: Quotes, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Quotes;  }> {
         const localVarPath = this.basePath + '/Quotes/{QuoteID}'
             .replace('{' + 'QuoteID' + '}', encodeURIComponent(String(quoteID)));
         let localVarQueryParameters: any = {};
@@ -16657,6 +17055,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -16706,8 +17105,9 @@ export class AccountingApi {
      * @param quoteID Unique identifier for an Quote
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateQuoteAttachmentByFileName (xeroTenantId: string, quoteID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async updateQuoteAttachmentByFileName (xeroTenantId: string, quoteID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/Quotes/{QuoteID}/Attachments/{FileName}'
             .replace('{' + 'QuoteID' + '}', encodeURIComponent(String(quoteID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -16737,6 +17137,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -16806,9 +17207,10 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param receiptID Unique identifier for a Receipt
      * @param receipts 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param unitdp e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
      */     
-    public async updateReceipt (xeroTenantId: string, receiptID: string, receipts: Receipts, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Receipts;  }> {
+    public async updateReceipt (xeroTenantId: string, receiptID: string, receipts: Receipts, idempotencyKey?: string, unitdp?: number, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Receipts;  }> {
         const localVarPath = this.basePath + '/Receipts/{ReceiptID}'
             .replace('{' + 'ReceiptID' + '}', encodeURIComponent(String(receiptID)));
         let localVarQueryParameters: any = {};
@@ -16835,6 +17237,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -16884,8 +17287,9 @@ export class AccountingApi {
      * @param receiptID Unique identifier for a Receipt
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateReceiptAttachmentByFileName (xeroTenantId: string, receiptID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async updateReceiptAttachmentByFileName (xeroTenantId: string, receiptID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/Receipts/{ReceiptID}/Attachments/{FileName}'
             .replace('{' + 'ReceiptID' + '}', encodeURIComponent(String(receiptID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -16915,6 +17319,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -16984,8 +17389,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param repeatingInvoiceID Unique identifier for a Repeating Invoice
      * @param repeatingInvoices 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateRepeatingInvoice (xeroTenantId: string, repeatingInvoiceID: string, repeatingInvoices: RepeatingInvoices, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: RepeatingInvoices;  }> {
+    public async updateRepeatingInvoice (xeroTenantId: string, repeatingInvoiceID: string, repeatingInvoices: RepeatingInvoices, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: RepeatingInvoices;  }> {
         const localVarPath = this.basePath + '/RepeatingInvoices/{RepeatingInvoiceID}'
             .replace('{' + 'RepeatingInvoiceID' + '}', encodeURIComponent(String(repeatingInvoiceID)));
         let localVarQueryParameters: any = {};
@@ -17008,6 +17414,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -17057,8 +17464,9 @@ export class AccountingApi {
      * @param repeatingInvoiceID Unique identifier for a Repeating Invoice
      * @param fileName Name of the attachment
      * @param body Byte array of file in body of request
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateRepeatingInvoiceAttachmentByFileName (xeroTenantId: string, repeatingInvoiceID: string, fileName: string, body: fs.ReadStream, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
+    public async updateRepeatingInvoiceAttachmentByFileName (xeroTenantId: string, repeatingInvoiceID: string, fileName: string, body: fs.ReadStream, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Attachments;  }> {
         const localVarPath = this.basePath + '/RepeatingInvoices/{RepeatingInvoiceID}/Attachments/{FileName}'
             .replace('{' + 'RepeatingInvoiceID' + '}', encodeURIComponent(String(repeatingInvoiceID)))
             .replace('{' + 'FileName' + '}', encodeURIComponent(String(fileName)));
@@ -17088,6 +17496,7 @@ export class AccountingApi {
         this.binaryHeaders = {'Accept': 'application/json'};
         (<any>Object).assign(localVarHeaderParams, this.binaryHeaders);
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -17156,8 +17565,9 @@ export class AccountingApi {
      * @summary Updates tax rates
      * @param xeroTenantId Xero identifier for Tenant
      * @param taxRates 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateTaxRate (xeroTenantId: string, taxRates: TaxRates, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TaxRates;  }> {
+    public async updateTaxRate (xeroTenantId: string, taxRates: TaxRates, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TaxRates;  }> {
         const localVarPath = this.basePath + '/TaxRates';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -17174,6 +17584,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -17222,8 +17633,9 @@ export class AccountingApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param trackingCategoryID Unique identifier for a TrackingCategory
      * @param trackingCategory 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateTrackingCategory (xeroTenantId: string, trackingCategoryID: string, trackingCategory: TrackingCategory, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TrackingCategories;  }> {
+    public async updateTrackingCategory (xeroTenantId: string, trackingCategoryID: string, trackingCategory: TrackingCategory, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TrackingCategories;  }> {
         const localVarPath = this.basePath + '/TrackingCategories/{TrackingCategoryID}'
             .replace('{' + 'TrackingCategoryID' + '}', encodeURIComponent(String(trackingCategoryID)));
         let localVarQueryParameters: any = {};
@@ -17246,6 +17658,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -17295,8 +17708,9 @@ export class AccountingApi {
      * @param trackingCategoryID Unique identifier for a TrackingCategory
      * @param trackingOptionID Unique identifier for a Tracking Option
      * @param trackingOption 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateTrackingOptions (xeroTenantId: string, trackingCategoryID: string, trackingOptionID: string, trackingOption: TrackingOption, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TrackingOptions;  }> {
+    public async updateTrackingOptions (xeroTenantId: string, trackingCategoryID: string, trackingOptionID: string, trackingOption: TrackingOption, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TrackingOptions;  }> {
         const localVarPath = this.basePath + '/TrackingCategories/{TrackingCategoryID}/Options/{TrackingOptionID}'
             .replace('{' + 'TrackingCategoryID' + '}', encodeURIComponent(String(trackingCategoryID)))
             .replace('{' + 'TrackingOptionID' + '}', encodeURIComponent(String(trackingOptionID)));
@@ -17325,6 +17739,7 @@ export class AccountingApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
diff --git a/src/gen/api/appStoreApi.ts b/src/gen/api/appStoreApi.ts
index 32714a09e..f75512dc9 100644
--- a/src/gen/api/appStoreApi.ts
+++ b/src/gen/api/appStoreApi.ts
@@ -2,7 +2,7 @@
  * Xero AppStore API
  * These endpoints are for Xero Partners to interact with the App Store Billing platform
  *
- * The version of the OpenAPI document: 2.38.0
+ * The version of the OpenAPI document: 2.40.0
  * Contact: api@xero.com
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
@@ -36,7 +36,7 @@ export enum AppStoreApiApiKeys {
 
 export class AppStoreApi {
     protected _basePath = defaultBasePath;
-    protected defaultHeaders : any = {'user-agent': 'xero-node-4.35.0'};
+    protected defaultHeaders : any = {'user-agent': 'xero-node-4.36.0'};
     protected _useQuerystring : boolean = false;
     protected binaryHeaders : any = {};
 
@@ -204,8 +204,9 @@ export class AppStoreApi {
      * @param subscriptionId Unique identifier for Subscription object
      * @param subscriptionItemId The unique identifier of the subscriptionItem
      * @param createUsageRecord Contains the quantity for the usage record to create
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async postUsageRecords (subscriptionId: string, subscriptionItemId: string, createUsageRecord: CreateUsageRecord, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: UsageRecord;  }> {
+    public async postUsageRecords (subscriptionId: string, subscriptionItemId: string, createUsageRecord: CreateUsageRecord, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: UsageRecord;  }> {
         const localVarPath = this.basePath + '/subscriptions/{subscriptionId}/items/{subscriptionItemId}/usage-records'
             .replace('{' + 'subscriptionId' + '}', encodeURIComponent(String(subscriptionId)))
             .replace('{' + 'subscriptionItemId' + '}', encodeURIComponent(String(subscriptionItemId)));
@@ -228,6 +229,7 @@ export class AppStoreApi {
             throw new Error('Required parameter createUsageRecord was null or undefined when calling postUsageRecords.');
         }
 
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -277,8 +279,9 @@ export class AppStoreApi {
      * @param subscriptionItemId The unique identifier of the subscriptionItem
      * @param usageRecordId The unique identifier of the usage record
      * @param updateUsageRecord Contains the quantity for the usage record to update
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async putUsageRecords (subscriptionId: string, subscriptionItemId: string, usageRecordId: string, updateUsageRecord: UpdateUsageRecord, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: UsageRecord;  }> {
+    public async putUsageRecords (subscriptionId: string, subscriptionItemId: string, usageRecordId: string, updateUsageRecord: UpdateUsageRecord, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: UsageRecord;  }> {
         const localVarPath = this.basePath + '/subscriptions/{subscriptionId}/items/{subscriptionItemId}/usage-records/{usageRecordId}'
             .replace('{' + 'subscriptionId' + '}', encodeURIComponent(String(subscriptionId)))
             .replace('{' + 'subscriptionItemId' + '}', encodeURIComponent(String(subscriptionItemId)))
@@ -307,6 +310,7 @@ export class AppStoreApi {
             throw new Error('Required parameter updateUsageRecord was null or undefined when calling putUsageRecords.');
         }
 
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
diff --git a/src/gen/api/assetApi.ts b/src/gen/api/assetApi.ts
index 9cdfa4648..8175509a7 100644
--- a/src/gen/api/assetApi.ts
+++ b/src/gen/api/assetApi.ts
@@ -2,7 +2,7 @@
  * Xero Assets API
  * The Assets API exposes fixed asset related functions of the Xero Accounting application and can be used for a variety of purposes such as creating assets, retrieving asset valuations etc.
  *
- * The version of the OpenAPI document: 2.38.0
+ * The version of the OpenAPI document: 2.40.0
  * Contact: api@xero.com
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
@@ -35,7 +35,7 @@ export enum AssetApiApiKeys {
 
 export class AssetApi {
     protected _basePath = defaultBasePath;
-    protected defaultHeaders : any = {'user-agent': 'xero-node-4.35.0'};
+    protected defaultHeaders : any = {'user-agent': 'xero-node-4.36.0'};
     protected _useQuerystring : boolean = false;
     protected binaryHeaders : any = {};
 
@@ -86,8 +86,9 @@ export class AssetApi {
      * @summary adds a fixed asset
      * @param xeroTenantId Xero identifier for Tenant
      * @param asset Fixed asset you are creating
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createAsset (xeroTenantId: string, asset: Asset, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Asset;  }> {
+    public async createAsset (xeroTenantId: string, asset: Asset, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Asset;  }> {
         const localVarPath = this.basePath + '/Assets';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -104,6 +105,7 @@ export class AssetApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -150,9 +152,10 @@ export class AssetApi {
      * Adds an fixed asset type to the system
      * @summary adds a fixed asset type
      * @param xeroTenantId Xero identifier for Tenant
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param assetType Asset type to add
      */     
-    public async createAssetType (xeroTenantId: string, assetType?: AssetType, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: AssetType;  }> {
+    public async createAssetType (xeroTenantId: string, idempotencyKey?: string, assetType?: AssetType, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: AssetType;  }> {
         const localVarPath = this.basePath + '/AssetTypes';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -164,6 +167,7 @@ export class AssetApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
diff --git a/src/gen/api/bankfeedsApi.ts b/src/gen/api/bankfeedsApi.ts
index 5a573f8ff..f86b354f3 100644
--- a/src/gen/api/bankfeedsApi.ts
+++ b/src/gen/api/bankfeedsApi.ts
@@ -2,7 +2,7 @@
  * Xero Bank Feeds API
  * The Bank Feeds API is a closed API that is only available to financial institutions that have an established financial services partnership with Xero. If you\'re an existing financial services partner that wants access, contact your local Partner Manager. If you\'re a financial institution who wants to provide bank feeds to your business customers, contact us to become a financial services partner.
  *
- * The version of the OpenAPI document: 2.38.0
+ * The version of the OpenAPI document: 2.40.0
  * Contact: api@xero.com
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
@@ -34,7 +34,7 @@ export enum BankFeedsApiApiKeys {
 
 export class BankFeedsApi {
     protected _basePath = defaultBasePath;
-    protected defaultHeaders : any = {'user-agent': 'xero-node-4.35.0'};
+    protected defaultHeaders : any = {'user-agent': 'xero-node-4.36.0'};
     protected _useQuerystring : boolean = false;
     protected binaryHeaders : any = {};
 
@@ -85,8 +85,9 @@ export class BankFeedsApi {
      * @summary Create one or more new feed connection
      * @param xeroTenantId Xero identifier for Tenant
      * @param feedConnections Feed Connection(s) array object in the body
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createFeedConnections (xeroTenantId: string, feedConnections: FeedConnections, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: FeedConnections;  }> {
+    public async createFeedConnections (xeroTenantId: string, feedConnections: FeedConnections, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: FeedConnections;  }> {
         const localVarPath = this.basePath + '/FeedConnections';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -103,6 +104,7 @@ export class BankFeedsApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -149,9 +151,10 @@ export class BankFeedsApi {
      * 
      * @summary Creates one or more new statements
      * @param xeroTenantId Xero identifier for Tenant
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param statements Statements array of objects in the body
      */     
-    public async createStatements (xeroTenantId: string, statements?: Statements, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Statements;  }> {
+    public async createStatements (xeroTenantId: string, idempotencyKey?: string, statements?: Statements, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Statements;  }> {
         const localVarPath = this.basePath + '/Statements';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -163,6 +166,7 @@ export class BankFeedsApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -210,8 +214,9 @@ export class BankFeedsApi {
      * @summary Delete an existing feed connection
      * @param xeroTenantId Xero identifier for Tenant
      * @param feedConnections Feed Connections array object in the body
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async deleteFeedConnections (xeroTenantId: string, feedConnections: FeedConnections, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: FeedConnections;  }> {
+    public async deleteFeedConnections (xeroTenantId: string, feedConnections: FeedConnections, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: FeedConnections;  }> {
         const localVarPath = this.basePath + '/FeedConnections/DeleteRequests';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -228,6 +233,7 @@ export class BankFeedsApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
diff --git a/src/gen/api/filesApi.ts b/src/gen/api/filesApi.ts
index beda6f6da..c9ce7512e 100644
--- a/src/gen/api/filesApi.ts
+++ b/src/gen/api/filesApi.ts
@@ -2,7 +2,7 @@
  * Xero Files API
  * These endpoints are specific to Xero Files API
  *
- * The version of the OpenAPI document: 2.38.0
+ * The version of the OpenAPI document: 2.40.0
  * Contact: api@xero.com
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
@@ -34,7 +34,7 @@ export enum FilesApiApiKeys {
 
 export class FilesApi {
     protected _basePath = defaultBasePath;
-    protected defaultHeaders : any = {'user-agent': 'xero-node-4.35.0'};
+    protected defaultHeaders : any = {'user-agent': 'xero-node-4.36.0'};
     protected _useQuerystring : boolean = false;
     protected binaryHeaders : any = {};
 
@@ -85,9 +85,10 @@ export class FilesApi {
      * @summary Creates a new file association
      * @param xeroTenantId Xero identifier for Tenant
      * @param fileId File id for single object
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param association 
      */     
-    public async createFileAssociation (xeroTenantId: string, fileId: string, association?: Association, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Association;  }> {
+    public async createFileAssociation (xeroTenantId: string, fileId: string, idempotencyKey?: string, association?: Association, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Association;  }> {
         const localVarPath = this.basePath + '/Files/{FileId}/Associations'
             .replace('{' + 'FileId' + '}', encodeURIComponent(String(fileId)));
         let localVarQueryParameters: any = {};
@@ -105,6 +106,7 @@ export class FilesApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -151,9 +153,10 @@ export class FilesApi {
      * By passing in the appropriate properties, you can create a new folder
      * @summary Creates a new folder
      * @param xeroTenantId Xero identifier for Tenant
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param folder 
      */     
-    public async createFolder (xeroTenantId: string, folder?: Folder, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Folder;  }> {
+    public async createFolder (xeroTenantId: string, idempotencyKey?: string, folder?: Folder, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Folder;  }> {
         const localVarPath = this.basePath + '/Folders';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -165,6 +168,7 @@ export class FilesApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -997,9 +1001,10 @@ export class FilesApi {
      * @summary Update a file
      * @param xeroTenantId Xero identifier for Tenant
      * @param fileId File id for single object
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param fileObject 
      */     
-    public async updateFile (xeroTenantId: string, fileId: string, fileObject?: FileObject, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: FileObject;  }> {
+    public async updateFile (xeroTenantId: string, fileId: string, idempotencyKey?: string, fileObject?: FileObject, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: FileObject;  }> {
         const localVarPath = this.basePath + '/Files/{FileId}'
             .replace('{' + 'FileId' + '}', encodeURIComponent(String(fileId)));
         let localVarQueryParameters: any = {};
@@ -1017,6 +1022,7 @@ export class FilesApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1065,8 +1071,9 @@ export class FilesApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param folderId Folder id for single object
      * @param folder 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateFolder (xeroTenantId: string, folderId: string, folder: Folder, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Folder;  }> {
+    public async updateFolder (xeroTenantId: string, folderId: string, folder: Folder, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Folder;  }> {
         const localVarPath = this.basePath + '/Folders/{FolderId}'
             .replace('{' + 'FolderId' + '}', encodeURIComponent(String(folderId)));
         let localVarQueryParameters: any = {};
@@ -1089,6 +1096,7 @@ export class FilesApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1138,9 +1146,10 @@ export class FilesApi {
      * @param body 
      * @param name exact name of the file you are uploading
      * @param filename 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param mimeType 
      */     
-    public async uploadFile (xeroTenantId: string, body: fs.ReadStream, name: string, filename: string, mimeType?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: FileObject;  }> {
+    public async uploadFile (xeroTenantId: string, body: fs.ReadStream, name: string, filename: string, idempotencyKey?: string, mimeType?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: FileObject;  }> {
         const localVarPath = this.basePath + '/Files';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1168,6 +1177,7 @@ export class FilesApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1233,9 +1243,10 @@ export class FilesApi {
      * @param body 
      * @param name exact name of the file you are uploading
      * @param filename 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param mimeType 
      */     
-    public async uploadFileToFolder (xeroTenantId: string, folderId: string, body: fs.ReadStream, name: string, filename: string, mimeType?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: FileObject;  }> {
+    public async uploadFileToFolder (xeroTenantId: string, folderId: string, body: fs.ReadStream, name: string, filename: string, idempotencyKey?: string, mimeType?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: FileObject;  }> {
         const localVarPath = this.basePath + '/Files/{FolderId}'
             .replace('{' + 'FolderId' + '}', encodeURIComponent(String(folderId)));
         let localVarQueryParameters: any = {};
@@ -1269,6 +1280,7 @@ export class FilesApi {
         }
 
         localVarHeaderParams['xero-tenant-id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
diff --git a/src/gen/api/financeApi.ts b/src/gen/api/financeApi.ts
index 40448ac3e..f4bd81971 100644
--- a/src/gen/api/financeApi.ts
+++ b/src/gen/api/financeApi.ts
@@ -2,7 +2,7 @@
  * Xero Finance API
  * The Finance API is a collection of endpoints which customers can use in the course of a loan application, which may assist lenders to gain the confidence they need to provide capital.
  *
- * The version of the OpenAPI document: 2.38.0
+ * The version of the OpenAPI document: 2.40.0
  * Contact: api@xero.com
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
@@ -42,7 +42,7 @@ export enum FinanceApiApiKeys {
 
 export class FinanceApi {
     protected _basePath = defaultBasePath;
-    protected defaultHeaders : any = {'user-agent': 'xero-node-4.35.0'};
+    protected defaultHeaders : any = {'user-agent': 'xero-node-4.36.0'};
     protected _useQuerystring : boolean = false;
     protected binaryHeaders : any = {};
 
diff --git a/src/gen/api/payrollAUApi.ts b/src/gen/api/payrollAUApi.ts
index 4e5193ba7..1d2e0c9bc 100644
--- a/src/gen/api/payrollAUApi.ts
+++ b/src/gen/api/payrollAUApi.ts
@@ -2,7 +2,7 @@
  * Xero Payroll AU API
  * This is the Xero Payroll API for orgs in Australia region.
  *
- * The version of the OpenAPI document: 2.38.0
+ * The version of the OpenAPI document: 2.40.0
  * Contact: api@xero.com
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
@@ -51,7 +51,7 @@ export enum PayrollAuApiApiKeys {
 
 export class PayrollAuApi {
     protected _basePath = defaultBasePath;
-    protected defaultHeaders : any = {'user-agent': 'xero-node-4.35.0'};
+    protected defaultHeaders : any = {'user-agent': 'xero-node-4.36.0'};
     protected _useQuerystring : boolean = false;
     protected binaryHeaders : any = {};
 
@@ -102,8 +102,9 @@ export class PayrollAuApi {
      * @summary Approve a requested leave application by a unique leave application id
      * @param xeroTenantId Xero identifier for Tenant
      * @param leaveApplicationID Leave Application id for single object
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async approveLeaveApplication (xeroTenantId: string, leaveApplicationID: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LeaveApplications;  }> {
+    public async approveLeaveApplication (xeroTenantId: string, leaveApplicationID: string, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LeaveApplications;  }> {
         const localVarPath = this.basePath + '/LeaveApplications/{LeaveApplicationID}/approve'
             .replace('{' + 'LeaveApplicationID' + '}', encodeURIComponent(String(leaveApplicationID)));
         let localVarQueryParameters: any = {};
@@ -121,6 +122,7 @@ export class PayrollAuApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -167,8 +169,9 @@ export class PayrollAuApi {
      * @summary Creates a payroll employee
      * @param xeroTenantId Xero identifier for Tenant
      * @param employee 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployee (xeroTenantId: string, employee: Array<Employee>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Employees;  }> {
+    public async createEmployee (xeroTenantId: string, employee: Array<Employee>, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Employees;  }> {
         const localVarPath = this.basePath + '/Employees';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -185,6 +188,7 @@ export class PayrollAuApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -232,8 +236,9 @@ export class PayrollAuApi {
      * @summary Creates a leave application
      * @param xeroTenantId Xero identifier for Tenant
      * @param leaveApplication 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createLeaveApplication (xeroTenantId: string, leaveApplication: Array<LeaveApplication>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LeaveApplications;  }> {
+    public async createLeaveApplication (xeroTenantId: string, leaveApplication: Array<LeaveApplication>, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LeaveApplications;  }> {
         const localVarPath = this.basePath + '/LeaveApplications';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -250,6 +255,7 @@ export class PayrollAuApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -297,8 +303,9 @@ export class PayrollAuApi {
      * @summary Creates a pay item
      * @param xeroTenantId Xero identifier for Tenant
      * @param payItem 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createPayItem (xeroTenantId: string, payItem: PayItem, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayItems;  }> {
+    public async createPayItem (xeroTenantId: string, payItem: PayItem, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayItems;  }> {
         const localVarPath = this.basePath + '/PayItems';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -315,6 +322,7 @@ export class PayrollAuApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -362,8 +370,9 @@ export class PayrollAuApi {
      * @summary Creates a pay run
      * @param xeroTenantId Xero identifier for Tenant
      * @param payRun 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createPayRun (xeroTenantId: string, payRun: Array<PayRun>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayRuns;  }> {
+    public async createPayRun (xeroTenantId: string, payRun: Array<PayRun>, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayRuns;  }> {
         const localVarPath = this.basePath + '/PayRuns';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -380,6 +389,7 @@ export class PayrollAuApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -427,8 +437,9 @@ export class PayrollAuApi {
      * @summary Creates a Payroll Calendar
      * @param xeroTenantId Xero identifier for Tenant
      * @param payrollCalendar 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createPayrollCalendar (xeroTenantId: string, payrollCalendar: Array<PayrollCalendar>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayrollCalendars;  }> {
+    public async createPayrollCalendar (xeroTenantId: string, payrollCalendar: Array<PayrollCalendar>, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayrollCalendars;  }> {
         const localVarPath = this.basePath + '/PayrollCalendars';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -445,6 +456,7 @@ export class PayrollAuApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -492,8 +504,9 @@ export class PayrollAuApi {
      * @summary Creates a superfund
      * @param xeroTenantId Xero identifier for Tenant
      * @param superFund 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createSuperfund (xeroTenantId: string, superFund: Array<SuperFund>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: SuperFunds;  }> {
+    public async createSuperfund (xeroTenantId: string, superFund: Array<SuperFund>, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: SuperFunds;  }> {
         const localVarPath = this.basePath + '/Superfunds';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -510,6 +523,7 @@ export class PayrollAuApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -557,8 +571,9 @@ export class PayrollAuApi {
      * @summary Creates a timesheet
      * @param xeroTenantId Xero identifier for Tenant
      * @param timesheet 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createTimesheet (xeroTenantId: string, timesheet: Array<Timesheet>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Timesheets;  }> {
+    public async createTimesheet (xeroTenantId: string, timesheet: Array<Timesheet>, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Timesheets;  }> {
         const localVarPath = this.basePath + '/Timesheets';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -575,6 +590,7 @@ export class PayrollAuApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1803,8 +1819,9 @@ export class PayrollAuApi {
      * @summary Reject a leave application by a unique leave application id
      * @param xeroTenantId Xero identifier for Tenant
      * @param leaveApplicationID Leave Application id for single object
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async rejectLeaveApplication (xeroTenantId: string, leaveApplicationID: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LeaveApplications;  }> {
+    public async rejectLeaveApplication (xeroTenantId: string, leaveApplicationID: string, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LeaveApplications;  }> {
         const localVarPath = this.basePath + '/LeaveApplications/{LeaveApplicationID}/reject'
             .replace('{' + 'LeaveApplicationID' + '}', encodeURIComponent(String(leaveApplicationID)));
         let localVarQueryParameters: any = {};
@@ -1822,6 +1839,7 @@ export class PayrollAuApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1868,9 +1886,10 @@ export class PayrollAuApi {
      * @summary Updates an employee\'s detail
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param employee 
      */     
-    public async updateEmployee (xeroTenantId: string, employeeID: string, employee?: Array<Employee>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Employees;  }> {
+    public async updateEmployee (xeroTenantId: string, employeeID: string, idempotencyKey?: string, employee?: Array<Employee>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Employees;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -1888,6 +1907,7 @@ export class PayrollAuApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1936,8 +1956,9 @@ export class PayrollAuApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param leaveApplicationID Leave Application id for single object
      * @param leaveApplication 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateLeaveApplication (xeroTenantId: string, leaveApplicationID: string, leaveApplication: Array<LeaveApplication>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LeaveApplications;  }> {
+    public async updateLeaveApplication (xeroTenantId: string, leaveApplicationID: string, leaveApplication: Array<LeaveApplication>, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LeaveApplications;  }> {
         const localVarPath = this.basePath + '/LeaveApplications/{LeaveApplicationID}'
             .replace('{' + 'LeaveApplicationID' + '}', encodeURIComponent(String(leaveApplicationID)));
         let localVarQueryParameters: any = {};
@@ -1960,6 +1981,7 @@ export class PayrollAuApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2007,9 +2029,10 @@ export class PayrollAuApi {
      * @summary Updates a pay run
      * @param xeroTenantId Xero identifier for Tenant
      * @param payRunID PayRun id for single object
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param payRun 
      */     
-    public async updatePayRun (xeroTenantId: string, payRunID: string, payRun?: Array<PayRun>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayRuns;  }> {
+    public async updatePayRun (xeroTenantId: string, payRunID: string, idempotencyKey?: string, payRun?: Array<PayRun>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayRuns;  }> {
         const localVarPath = this.basePath + '/PayRuns/{PayRunID}'
             .replace('{' + 'PayRunID' + '}', encodeURIComponent(String(payRunID)));
         let localVarQueryParameters: any = {};
@@ -2027,6 +2050,7 @@ export class PayrollAuApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2074,9 +2098,10 @@ export class PayrollAuApi {
      * @summary Updates a payslip
      * @param xeroTenantId Xero identifier for Tenant
      * @param payslipID Payslip id for single object
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param payslipLines 
      */     
-    public async updatePayslip (xeroTenantId: string, payslipID: string, payslipLines?: Array<PayslipLines>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Payslips;  }> {
+    public async updatePayslip (xeroTenantId: string, payslipID: string, idempotencyKey?: string, payslipLines?: Array<PayslipLines>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Payslips;  }> {
         const localVarPath = this.basePath + '/Payslip/{PayslipID}'
             .replace('{' + 'PayslipID' + '}', encodeURIComponent(String(payslipID)));
         let localVarQueryParameters: any = {};
@@ -2094,6 +2119,7 @@ export class PayrollAuApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2141,9 +2167,10 @@ export class PayrollAuApi {
      * @summary Updates a superfund
      * @param xeroTenantId Xero identifier for Tenant
      * @param superFundID Superfund id for single object
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param superFund 
      */     
-    public async updateSuperfund (xeroTenantId: string, superFundID: string, superFund?: Array<SuperFund>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: SuperFunds;  }> {
+    public async updateSuperfund (xeroTenantId: string, superFundID: string, idempotencyKey?: string, superFund?: Array<SuperFund>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: SuperFunds;  }> {
         const localVarPath = this.basePath + '/Superfunds/{SuperFundID}'
             .replace('{' + 'SuperFundID' + '}', encodeURIComponent(String(superFundID)));
         let localVarQueryParameters: any = {};
@@ -2161,6 +2188,7 @@ export class PayrollAuApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -2208,9 +2236,10 @@ export class PayrollAuApi {
      * @summary Updates a timesheet
      * @param xeroTenantId Xero identifier for Tenant
      * @param timesheetID Timesheet id for single object
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      * @param timesheet 
      */     
-    public async updateTimesheet (xeroTenantId: string, timesheetID: string, timesheet?: Array<Timesheet>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Timesheets;  }> {
+    public async updateTimesheet (xeroTenantId: string, timesheetID: string, idempotencyKey?: string, timesheet?: Array<Timesheet>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Timesheets;  }> {
         const localVarPath = this.basePath + '/Timesheets/{TimesheetID}'
             .replace('{' + 'TimesheetID' + '}', encodeURIComponent(String(timesheetID)));
         let localVarQueryParameters: any = {};
@@ -2228,6 +2257,7 @@ export class PayrollAuApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
diff --git a/src/gen/api/payrollNZApi.ts b/src/gen/api/payrollNZApi.ts
index 974fd87e1..1025e98aa 100644
--- a/src/gen/api/payrollNZApi.ts
+++ b/src/gen/api/payrollNZApi.ts
@@ -2,7 +2,7 @@
  * Xero Payroll NZ
  * This is the Xero Payroll API for orgs in the NZ region.
  *
- * The version of the OpenAPI document: 2.38.0
+ * The version of the OpenAPI document: 2.40.0
  * Contact: api@xero.com
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
@@ -92,7 +92,7 @@ export enum PayrollNzApiApiKeys {
 
 export class PayrollNzApi {
     protected _basePath = defaultBasePath;
-    protected defaultHeaders : any = {'user-agent': 'xero-node-4.35.0'};
+    protected defaultHeaders : any = {'user-agent': 'xero-node-4.36.0'};
     protected _useQuerystring : boolean = false;
     protected binaryHeaders : any = {};
 
@@ -143,8 +143,9 @@ export class PayrollNzApi {
      * @summary Approves a timesheet
      * @param xeroTenantId Xero identifier for Tenant
      * @param timesheetID Identifier for the timesheet
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async approveTimesheet (xeroTenantId: string, timesheetID: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetObject;  }> {
+    public async approveTimesheet (xeroTenantId: string, timesheetID: string, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetObject;  }> {
         const localVarPath = this.basePath + '/Timesheets/{TimesheetID}/Approve'
             .replace('{' + 'TimesheetID' + '}', encodeURIComponent(String(timesheetID)));
         let localVarQueryParameters: any = {};
@@ -162,6 +163,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -208,8 +210,9 @@ export class PayrollNzApi {
      * @summary Creates a new deduction for a specific employee
      * @param xeroTenantId Xero identifier for Tenant
      * @param deduction 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createDeduction (xeroTenantId: string, deduction: Deduction, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: DeductionObject;  }> {
+    public async createDeduction (xeroTenantId: string, deduction: Deduction, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: DeductionObject;  }> {
         const localVarPath = this.basePath + '/Deductions';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -226,6 +229,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -273,8 +277,9 @@ export class PayrollNzApi {
      * @summary Creates a new earnings rate
      * @param xeroTenantId Xero identifier for Tenant
      * @param earningsRate 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEarningsRate (xeroTenantId: string, earningsRate: EarningsRate, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EarningsRateObject;  }> {
+    public async createEarningsRate (xeroTenantId: string, earningsRate: EarningsRate, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EarningsRateObject;  }> {
         const localVarPath = this.basePath + '/EarningsRates';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -291,6 +296,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -338,8 +344,9 @@ export class PayrollNzApi {
      * @summary Creates an employees
      * @param xeroTenantId Xero identifier for Tenant
      * @param employee 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployee (xeroTenantId: string, employee: Employee, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeObject;  }> {
+    public async createEmployee (xeroTenantId: string, employee: Employee, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeObject;  }> {
         const localVarPath = this.basePath + '/Employees';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -356,6 +363,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -404,8 +412,9 @@ export class PayrollNzApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param earningsTemplate 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployeeEarningsTemplate (xeroTenantId: string, employeeID: string, earningsTemplate: EarningsTemplate, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EarningsTemplateObject;  }> {
+    public async createEmployeeEarningsTemplate (xeroTenantId: string, employeeID: string, earningsTemplate: EarningsTemplate, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EarningsTemplateObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/PayTemplates/earnings'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -428,6 +437,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -476,8 +486,9 @@ export class PayrollNzApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param employeeLeave 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployeeLeave (xeroTenantId: string, employeeID: string, employeeLeave: EmployeeLeave, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeLeaveObject;  }> {
+    public async createEmployeeLeave (xeroTenantId: string, employeeID: string, employeeLeave: EmployeeLeave, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeLeaveObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/Leave'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -500,6 +511,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -548,8 +560,9 @@ export class PayrollNzApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param employeeLeaveSetup 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployeeLeaveSetup (xeroTenantId: string, employeeID: string, employeeLeaveSetup: EmployeeLeaveSetup, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeLeaveSetupObject;  }> {
+    public async createEmployeeLeaveSetup (xeroTenantId: string, employeeID: string, employeeLeaveSetup: EmployeeLeaveSetup, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeLeaveSetupObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/leaveSetup'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -572,6 +585,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -620,8 +634,9 @@ export class PayrollNzApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param employeeLeaveType 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployeeLeaveType (xeroTenantId: string, employeeID: string, employeeLeaveType: EmployeeLeaveType, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeLeaveTypeObject;  }> {
+    public async createEmployeeLeaveType (xeroTenantId: string, employeeID: string, employeeLeaveType: EmployeeLeaveType, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeLeaveTypeObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/LeaveTypes'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -644,6 +659,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -692,8 +708,9 @@ export class PayrollNzApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param employeeOpeningBalance 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployeeOpeningBalances (xeroTenantId: string, employeeID: string, employeeOpeningBalance: Array<EmployeeOpeningBalance>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeOpeningBalancesObject;  }> {
+    public async createEmployeeOpeningBalances (xeroTenantId: string, employeeID: string, employeeOpeningBalance: Array<EmployeeOpeningBalance>, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeOpeningBalancesObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/openingBalances'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -716,6 +733,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -764,8 +782,9 @@ export class PayrollNzApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param paymentMethod 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployeePaymentMethod (xeroTenantId: string, employeeID: string, paymentMethod: PaymentMethod, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PaymentMethodObject;  }> {
+    public async createEmployeePaymentMethod (xeroTenantId: string, employeeID: string, paymentMethod: PaymentMethod, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PaymentMethodObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/PaymentMethods'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -788,6 +807,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -836,8 +856,9 @@ export class PayrollNzApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param salaryAndWage 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployeeSalaryAndWage (xeroTenantId: string, employeeID: string, salaryAndWage: SalaryAndWage, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: SalaryAndWageObject;  }> {
+    public async createEmployeeSalaryAndWage (xeroTenantId: string, employeeID: string, salaryAndWage: SalaryAndWage, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: SalaryAndWageObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/SalaryAndWages'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -860,6 +881,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -908,8 +930,9 @@ export class PayrollNzApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param employment 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployment (xeroTenantId: string, employeeID: string, employment: Employment, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmploymentObject;  }> {
+    public async createEmployment (xeroTenantId: string, employeeID: string, employment: Employment, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmploymentObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/Employment'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -932,6 +955,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -979,8 +1003,9 @@ export class PayrollNzApi {
      * @summary Creates a new leave type
      * @param xeroTenantId Xero identifier for Tenant
      * @param leaveType 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createLeaveType (xeroTenantId: string, leaveType: LeaveType, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LeaveTypeObject;  }> {
+    public async createLeaveType (xeroTenantId: string, leaveType: LeaveType, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LeaveTypeObject;  }> {
         const localVarPath = this.basePath + '/LeaveTypes';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -997,6 +1022,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1045,8 +1071,9 @@ export class PayrollNzApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param earningsTemplate 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createMultipleEmployeeEarningsTemplate (xeroTenantId: string, employeeID: string, earningsTemplate: Array<EarningsTemplate>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeEarningsTemplates;  }> {
+    public async createMultipleEmployeeEarningsTemplate (xeroTenantId: string, employeeID: string, earningsTemplate: Array<EarningsTemplate>, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeEarningsTemplates;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/paytemplateearnings'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -1069,6 +1096,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1116,8 +1144,9 @@ export class PayrollNzApi {
      * @summary Creates a pay run
      * @param xeroTenantId Xero identifier for Tenant
      * @param payRun 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createPayRun (xeroTenantId: string, payRun: PayRun, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayRunObject;  }> {
+    public async createPayRun (xeroTenantId: string, payRun: PayRun, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayRunObject;  }> {
         const localVarPath = this.basePath + '/PayRuns';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1134,6 +1163,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1181,8 +1211,9 @@ export class PayrollNzApi {
      * @summary Creates a new payrun calendar
      * @param xeroTenantId Xero identifier for Tenant
      * @param payRunCalendar 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createPayRunCalendar (xeroTenantId: string, payRunCalendar: PayRunCalendar, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayRunCalendarObject;  }> {
+    public async createPayRunCalendar (xeroTenantId: string, payRunCalendar: PayRunCalendar, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayRunCalendarObject;  }> {
         const localVarPath = this.basePath + '/PayRunCalendars';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1199,6 +1230,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1246,8 +1278,9 @@ export class PayrollNzApi {
      * @summary Creates a new reimbursement
      * @param xeroTenantId Xero identifier for Tenant
      * @param reimbursement 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createReimbursement (xeroTenantId: string, reimbursement: Reimbursement, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ReimbursementObject;  }> {
+    public async createReimbursement (xeroTenantId: string, reimbursement: Reimbursement, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ReimbursementObject;  }> {
         const localVarPath = this.basePath + '/Reimbursements';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1264,6 +1297,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1311,8 +1345,9 @@ export class PayrollNzApi {
      * @summary Creates a new superannuation
      * @param xeroTenantId Xero identifier for Tenant
      * @param benefit 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createSuperannuation (xeroTenantId: string, benefit: Benefit, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: SuperannuationObject;  }> {
+    public async createSuperannuation (xeroTenantId: string, benefit: Benefit, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: SuperannuationObject;  }> {
         const localVarPath = this.basePath + '/Superannuations';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1329,6 +1364,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1376,8 +1412,9 @@ export class PayrollNzApi {
      * @summary Creates a new timesheet
      * @param xeroTenantId Xero identifier for Tenant
      * @param timesheet 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createTimesheet (xeroTenantId: string, timesheet: Timesheet, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetObject;  }> {
+    public async createTimesheet (xeroTenantId: string, timesheet: Timesheet, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetObject;  }> {
         const localVarPath = this.basePath + '/Timesheets';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1394,6 +1431,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1442,8 +1480,9 @@ export class PayrollNzApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param timesheetID Identifier for the timesheet
      * @param timesheetLine 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createTimesheetLine (xeroTenantId: string, timesheetID: string, timesheetLine: TimesheetLine, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetLineObject;  }> {
+    public async createTimesheetLine (xeroTenantId: string, timesheetID: string, timesheetLine: TimesheetLine, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetLineObject;  }> {
         const localVarPath = this.basePath + '/Timesheets/{TimesheetID}/Lines'
             .replace('{' + 'TimesheetID' + '}', encodeURIComponent(String(timesheetID)));
         let localVarQueryParameters: any = {};
@@ -1466,6 +1505,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4112,8 +4152,9 @@ export class PayrollNzApi {
      * @summary Reverts a timesheet to draft
      * @param xeroTenantId Xero identifier for Tenant
      * @param timesheetID Identifier for the timesheet
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async revertTimesheet (xeroTenantId: string, timesheetID: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetObject;  }> {
+    public async revertTimesheet (xeroTenantId: string, timesheetID: string, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetObject;  }> {
         const localVarPath = this.basePath + '/Timesheets/{TimesheetID}/RevertToDraft'
             .replace('{' + 'TimesheetID' + '}', encodeURIComponent(String(timesheetID)));
         let localVarQueryParameters: any = {};
@@ -4131,6 +4172,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4178,8 +4220,9 @@ export class PayrollNzApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param employee 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateEmployee (xeroTenantId: string, employeeID: string, employee: Employee, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeObject;  }> {
+    public async updateEmployee (xeroTenantId: string, employeeID: string, employee: Employee, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -4202,6 +4245,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4251,8 +4295,9 @@ export class PayrollNzApi {
      * @param employeeID Employee id for single object
      * @param payTemplateEarningID Id for single pay template earnings object
      * @param earningsTemplate 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateEmployeeEarningsTemplate (xeroTenantId: string, employeeID: string, payTemplateEarningID: string, earningsTemplate: EarningsTemplate, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EarningsTemplateObject;  }> {
+    public async updateEmployeeEarningsTemplate (xeroTenantId: string, employeeID: string, payTemplateEarningID: string, earningsTemplate: EarningsTemplate, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EarningsTemplateObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/PayTemplates/earnings/{PayTemplateEarningID}'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)))
             .replace('{' + 'PayTemplateEarningID' + '}', encodeURIComponent(String(payTemplateEarningID)));
@@ -4281,6 +4326,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4330,8 +4376,9 @@ export class PayrollNzApi {
      * @param employeeID Employee id for single object
      * @param leaveID Leave id for single object
      * @param employeeLeave 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateEmployeeLeave (xeroTenantId: string, employeeID: string, leaveID: string, employeeLeave: EmployeeLeave, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeLeaveObject;  }> {
+    public async updateEmployeeLeave (xeroTenantId: string, employeeID: string, leaveID: string, employeeLeave: EmployeeLeave, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeLeaveObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/Leave/{LeaveID}'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)))
             .replace('{' + 'LeaveID' + '}', encodeURIComponent(String(leaveID)));
@@ -4360,6 +4407,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4409,8 +4457,9 @@ export class PayrollNzApi {
      * @param employeeID Employee id for single object
      * @param salaryAndWagesID Id for single pay template earnings object
      * @param salaryAndWage 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateEmployeeSalaryAndWage (xeroTenantId: string, employeeID: string, salaryAndWagesID: string, salaryAndWage: SalaryAndWage, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: SalaryAndWageObject;  }> {
+    public async updateEmployeeSalaryAndWage (xeroTenantId: string, employeeID: string, salaryAndWagesID: string, salaryAndWage: SalaryAndWage, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: SalaryAndWageObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/SalaryAndWages/{SalaryAndWagesID}'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)))
             .replace('{' + 'SalaryAndWagesID' + '}', encodeURIComponent(String(salaryAndWagesID)));
@@ -4439,6 +4488,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4487,8 +4537,9 @@ export class PayrollNzApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param employeeTax 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateEmployeeTax (xeroTenantId: string, employeeID: string, employeeTax: EmployeeTax, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeTaxObject;  }> {
+    public async updateEmployeeTax (xeroTenantId: string, employeeID: string, employeeTax: EmployeeTax, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeTaxObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/Tax'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -4511,6 +4562,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4559,8 +4611,9 @@ export class PayrollNzApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param payRunID Identifier for the pay run
      * @param payRun 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updatePayRun (xeroTenantId: string, payRunID: string, payRun: PayRun, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayRunObject;  }> {
+    public async updatePayRun (xeroTenantId: string, payRunID: string, payRun: PayRun, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayRunObject;  }> {
         const localVarPath = this.basePath + '/PayRuns/{PayRunID}'
             .replace('{' + 'PayRunID' + '}', encodeURIComponent(String(payRunID)));
         let localVarQueryParameters: any = {};
@@ -4583,6 +4636,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4631,8 +4685,9 @@ export class PayrollNzApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param paySlipID Identifier for the payslip
      * @param paySlip 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updatePaySlipLineItems (xeroTenantId: string, paySlipID: string, paySlip: PaySlip, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PaySlipObject;  }> {
+    public async updatePaySlipLineItems (xeroTenantId: string, paySlipID: string, paySlip: PaySlip, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PaySlipObject;  }> {
         const localVarPath = this.basePath + '/PaySlips/{PaySlipID}'
             .replace('{' + 'PaySlipID' + '}', encodeURIComponent(String(paySlipID)));
         let localVarQueryParameters: any = {};
@@ -4655,6 +4710,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4704,8 +4760,9 @@ export class PayrollNzApi {
      * @param timesheetID Identifier for the timesheet
      * @param timesheetLineID Identifier for the timesheet line
      * @param timesheetLine 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateTimesheetLine (xeroTenantId: string, timesheetID: string, timesheetLineID: string, timesheetLine: TimesheetLine, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetLineObject;  }> {
+    public async updateTimesheetLine (xeroTenantId: string, timesheetID: string, timesheetLineID: string, timesheetLine: TimesheetLine, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetLineObject;  }> {
         const localVarPath = this.basePath + '/Timesheets/{TimesheetID}/Lines/{TimesheetLineID}'
             .replace('{' + 'TimesheetID' + '}', encodeURIComponent(String(timesheetID)))
             .replace('{' + 'TimesheetLineID' + '}', encodeURIComponent(String(timesheetLineID)));
@@ -4734,6 +4791,7 @@ export class PayrollNzApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
diff --git a/src/gen/api/payrollUKApi.ts b/src/gen/api/payrollUKApi.ts
index 56d1b9e40..ed6d009f7 100644
--- a/src/gen/api/payrollUKApi.ts
+++ b/src/gen/api/payrollUKApi.ts
@@ -2,7 +2,7 @@
  * Xero Payroll UK
  * This is the Xero Payroll API for orgs in the UK region.
  *
- * The version of the OpenAPI document: 2.38.0
+ * The version of the OpenAPI document: 2.40.0
  * Contact: api@xero.com
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
@@ -92,7 +92,7 @@ export enum PayrollUkApiApiKeys {
 
 export class PayrollUkApi {
     protected _basePath = defaultBasePath;
-    protected defaultHeaders : any = {'user-agent': 'xero-node-4.35.0'};
+    protected defaultHeaders : any = {'user-agent': 'xero-node-4.36.0'};
     protected _useQuerystring : boolean = false;
     protected binaryHeaders : any = {};
 
@@ -143,8 +143,9 @@ export class PayrollUkApi {
      * @summary Approves a specific timesheet
      * @param xeroTenantId Xero identifier for Tenant
      * @param timesheetID Identifier for the timesheet
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async approveTimesheet (xeroTenantId: string, timesheetID: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetObject;  }> {
+    public async approveTimesheet (xeroTenantId: string, timesheetID: string, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetObject;  }> {
         const localVarPath = this.basePath + '/Timesheets/{TimesheetID}/Approve'
             .replace('{' + 'TimesheetID' + '}', encodeURIComponent(String(timesheetID)));
         let localVarQueryParameters: any = {};
@@ -162,6 +163,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -208,8 +210,9 @@ export class PayrollUkApi {
      * @summary Creates a new employee benefit
      * @param xeroTenantId Xero identifier for Tenant
      * @param benefit 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createBenefit (xeroTenantId: string, benefit: Benefit, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BenefitObject;  }> {
+    public async createBenefit (xeroTenantId: string, benefit: Benefit, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: BenefitObject;  }> {
         const localVarPath = this.basePath + '/Benefits';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -226,6 +229,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -273,8 +277,9 @@ export class PayrollUkApi {
      * @summary Creates a new deduction
      * @param xeroTenantId Xero identifier for Tenant
      * @param deduction 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createDeduction (xeroTenantId: string, deduction: Deduction, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: DeductionObject;  }> {
+    public async createDeduction (xeroTenantId: string, deduction: Deduction, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: DeductionObject;  }> {
         const localVarPath = this.basePath + '/Deductions';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -291,6 +296,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -338,8 +344,9 @@ export class PayrollUkApi {
      * @summary Creates a new earnings rate
      * @param xeroTenantId Xero identifier for Tenant
      * @param earningsRate 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEarningsRate (xeroTenantId: string, earningsRate: EarningsRate, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EarningsRateObject;  }> {
+    public async createEarningsRate (xeroTenantId: string, earningsRate: EarningsRate, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EarningsRateObject;  }> {
         const localVarPath = this.basePath + '/EarningsRates';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -356,6 +363,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -403,8 +411,9 @@ export class PayrollUkApi {
      * @summary Creates employees
      * @param xeroTenantId Xero identifier for Tenant
      * @param employee 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployee (xeroTenantId: string, employee: Employee, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeObject;  }> {
+    public async createEmployee (xeroTenantId: string, employee: Employee, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeObject;  }> {
         const localVarPath = this.basePath + '/Employees';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -421,6 +430,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -469,8 +479,9 @@ export class PayrollUkApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param earningsTemplate 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployeeEarningsTemplate (xeroTenantId: string, employeeID: string, earningsTemplate: EarningsTemplate, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EarningsTemplateObject;  }> {
+    public async createEmployeeEarningsTemplate (xeroTenantId: string, employeeID: string, earningsTemplate: EarningsTemplate, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EarningsTemplateObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/PayTemplates/earnings'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -493,6 +504,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -541,8 +553,9 @@ export class PayrollUkApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param employeeLeave 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployeeLeave (xeroTenantId: string, employeeID: string, employeeLeave: EmployeeLeave, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeLeaveObject;  }> {
+    public async createEmployeeLeave (xeroTenantId: string, employeeID: string, employeeLeave: EmployeeLeave, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeLeaveObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/Leave'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -565,6 +578,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -613,8 +627,9 @@ export class PayrollUkApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param employeeLeaveType 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployeeLeaveType (xeroTenantId: string, employeeID: string, employeeLeaveType: EmployeeLeaveType, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeLeaveTypeObject;  }> {
+    public async createEmployeeLeaveType (xeroTenantId: string, employeeID: string, employeeLeaveType: EmployeeLeaveType, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeLeaveTypeObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/LeaveTypes'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -637,6 +652,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -685,8 +701,9 @@ export class PayrollUkApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param employeeOpeningBalances 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployeeOpeningBalances (xeroTenantId: string, employeeID: string, employeeOpeningBalances: EmployeeOpeningBalances, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeOpeningBalancesObject;  }> {
+    public async createEmployeeOpeningBalances (xeroTenantId: string, employeeID: string, employeeOpeningBalances: EmployeeOpeningBalances, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeOpeningBalancesObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/ukopeningbalances'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -709,6 +726,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -757,8 +775,9 @@ export class PayrollUkApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param paymentMethod 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployeePaymentMethod (xeroTenantId: string, employeeID: string, paymentMethod: PaymentMethod, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PaymentMethodObject;  }> {
+    public async createEmployeePaymentMethod (xeroTenantId: string, employeeID: string, paymentMethod: PaymentMethod, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PaymentMethodObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/PaymentMethods'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -781,6 +800,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -829,8 +849,9 @@ export class PayrollUkApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param salaryAndWage 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployeeSalaryAndWage (xeroTenantId: string, employeeID: string, salaryAndWage: SalaryAndWage, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: SalaryAndWageObject;  }> {
+    public async createEmployeeSalaryAndWage (xeroTenantId: string, employeeID: string, salaryAndWage: SalaryAndWage, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: SalaryAndWageObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/SalaryAndWages'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -853,6 +874,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -900,8 +922,9 @@ export class PayrollUkApi {
      * @summary Creates statutory sick leave records
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeStatutorySickLeave 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployeeStatutorySickLeave (xeroTenantId: string, employeeStatutorySickLeave: EmployeeStatutorySickLeave, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeStatutorySickLeaveObject;  }> {
+    public async createEmployeeStatutorySickLeave (xeroTenantId: string, employeeStatutorySickLeave: EmployeeStatutorySickLeave, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeStatutorySickLeaveObject;  }> {
         const localVarPath = this.basePath + '/StatutoryLeaves/Sick';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -918,6 +941,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -966,8 +990,9 @@ export class PayrollUkApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param employment 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createEmployment (xeroTenantId: string, employeeID: string, employment: Employment, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmploymentObject;  }> {
+    public async createEmployment (xeroTenantId: string, employeeID: string, employment: Employment, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmploymentObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/Employment'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -990,6 +1015,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1037,8 +1063,9 @@ export class PayrollUkApi {
      * @summary Creates a new leave type
      * @param xeroTenantId Xero identifier for Tenant
      * @param leaveType 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createLeaveType (xeroTenantId: string, leaveType: LeaveType, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LeaveTypeObject;  }> {
+    public async createLeaveType (xeroTenantId: string, leaveType: LeaveType, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: LeaveTypeObject;  }> {
         const localVarPath = this.basePath + '/LeaveTypes';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1055,6 +1082,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1103,8 +1131,9 @@ export class PayrollUkApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param earningsTemplate 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createMultipleEmployeeEarningsTemplate (xeroTenantId: string, employeeID: string, earningsTemplate: Array<EarningsTemplate>, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeePayTemplates;  }> {
+    public async createMultipleEmployeeEarningsTemplate (xeroTenantId: string, employeeID: string, earningsTemplate: Array<EarningsTemplate>, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeePayTemplates;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/paytemplateearnings'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -1127,6 +1156,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1174,8 +1204,9 @@ export class PayrollUkApi {
      * @summary Creates a new payrun calendar
      * @param xeroTenantId Xero identifier for Tenant
      * @param payRunCalendar 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createPayRunCalendar (xeroTenantId: string, payRunCalendar: PayRunCalendar, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayRunCalendarObject;  }> {
+    public async createPayRunCalendar (xeroTenantId: string, payRunCalendar: PayRunCalendar, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayRunCalendarObject;  }> {
         const localVarPath = this.basePath + '/PayRunCalendars';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1192,6 +1223,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1239,8 +1271,9 @@ export class PayrollUkApi {
      * @summary Creates a new reimbursement
      * @param xeroTenantId Xero identifier for Tenant
      * @param reimbursement 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createReimbursement (xeroTenantId: string, reimbursement: Reimbursement, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ReimbursementObject;  }> {
+    public async createReimbursement (xeroTenantId: string, reimbursement: Reimbursement, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: ReimbursementObject;  }> {
         const localVarPath = this.basePath + '/Reimbursements';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1257,6 +1290,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1304,8 +1338,9 @@ export class PayrollUkApi {
      * @summary Creates a new timesheet
      * @param xeroTenantId Xero identifier for Tenant
      * @param timesheet 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createTimesheet (xeroTenantId: string, timesheet: Timesheet, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetObject;  }> {
+    public async createTimesheet (xeroTenantId: string, timesheet: Timesheet, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetObject;  }> {
         const localVarPath = this.basePath + '/Timesheets';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -1322,6 +1357,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1370,8 +1406,9 @@ export class PayrollUkApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param timesheetID Identifier for the timesheet
      * @param timesheetLine 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createTimesheetLine (xeroTenantId: string, timesheetID: string, timesheetLine: TimesheetLine, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetLineObject;  }> {
+    public async createTimesheetLine (xeroTenantId: string, timesheetID: string, timesheetLine: TimesheetLine, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetLineObject;  }> {
         const localVarPath = this.basePath + '/Timesheets/{TimesheetID}/Lines'
             .replace('{' + 'TimesheetID' + '}', encodeURIComponent(String(timesheetID)));
         let localVarQueryParameters: any = {};
@@ -1394,6 +1431,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4320,8 +4358,9 @@ export class PayrollUkApi {
      * @summary Reverts a specific timesheet to draft
      * @param xeroTenantId Xero identifier for Tenant
      * @param timesheetID Identifier for the timesheet
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async revertTimesheet (xeroTenantId: string, timesheetID: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetObject;  }> {
+    public async revertTimesheet (xeroTenantId: string, timesheetID: string, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetObject;  }> {
         const localVarPath = this.basePath + '/Timesheets/{TimesheetID}/RevertToDraft'
             .replace('{' + 'TimesheetID' + '}', encodeURIComponent(String(timesheetID)));
         let localVarQueryParameters: any = {};
@@ -4339,6 +4378,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4386,8 +4426,9 @@ export class PayrollUkApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param employee 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateEmployee (xeroTenantId: string, employeeID: string, employee: Employee, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeObject;  }> {
+    public async updateEmployee (xeroTenantId: string, employeeID: string, employee: Employee, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -4410,6 +4451,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4459,8 +4501,9 @@ export class PayrollUkApi {
      * @param employeeID Employee id for single object
      * @param payTemplateEarningID Id for single pay template earnings object
      * @param earningsTemplate 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateEmployeeEarningsTemplate (xeroTenantId: string, employeeID: string, payTemplateEarningID: string, earningsTemplate: EarningsTemplate, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EarningsTemplateObject;  }> {
+    public async updateEmployeeEarningsTemplate (xeroTenantId: string, employeeID: string, payTemplateEarningID: string, earningsTemplate: EarningsTemplate, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EarningsTemplateObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/PayTemplates/earnings/{PayTemplateEarningID}'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)))
             .replace('{' + 'PayTemplateEarningID' + '}', encodeURIComponent(String(payTemplateEarningID)));
@@ -4489,6 +4532,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4538,8 +4582,9 @@ export class PayrollUkApi {
      * @param employeeID Employee id for single object
      * @param leaveID Leave id for single object
      * @param employeeLeave 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateEmployeeLeave (xeroTenantId: string, employeeID: string, leaveID: string, employeeLeave: EmployeeLeave, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeLeaveObject;  }> {
+    public async updateEmployeeLeave (xeroTenantId: string, employeeID: string, leaveID: string, employeeLeave: EmployeeLeave, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeLeaveObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/Leave/{LeaveID}'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)))
             .replace('{' + 'LeaveID' + '}', encodeURIComponent(String(leaveID)));
@@ -4568,6 +4613,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4616,8 +4662,9 @@ export class PayrollUkApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param employeeID Employee id for single object
      * @param employeeOpeningBalances 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateEmployeeOpeningBalances (xeroTenantId: string, employeeID: string, employeeOpeningBalances: EmployeeOpeningBalances, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeOpeningBalancesObject;  }> {
+    public async updateEmployeeOpeningBalances (xeroTenantId: string, employeeID: string, employeeOpeningBalances: EmployeeOpeningBalances, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: EmployeeOpeningBalancesObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/ukopeningbalances'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)));
         let localVarQueryParameters: any = {};
@@ -4640,6 +4687,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4689,8 +4737,9 @@ export class PayrollUkApi {
      * @param employeeID Employee id for single object
      * @param salaryAndWagesID Id for single pay template earnings object
      * @param salaryAndWage 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateEmployeeSalaryAndWage (xeroTenantId: string, employeeID: string, salaryAndWagesID: string, salaryAndWage: SalaryAndWage, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: SalaryAndWageObject;  }> {
+    public async updateEmployeeSalaryAndWage (xeroTenantId: string, employeeID: string, salaryAndWagesID: string, salaryAndWage: SalaryAndWage, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: SalaryAndWageObject;  }> {
         const localVarPath = this.basePath + '/Employees/{EmployeeID}/SalaryAndWages/{SalaryAndWagesID}'
             .replace('{' + 'EmployeeID' + '}', encodeURIComponent(String(employeeID)))
             .replace('{' + 'SalaryAndWagesID' + '}', encodeURIComponent(String(salaryAndWagesID)));
@@ -4719,6 +4768,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4767,8 +4817,9 @@ export class PayrollUkApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param payRunID Identifier for the pay run
      * @param payRun 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updatePayRun (xeroTenantId: string, payRunID: string, payRun: PayRun, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayRunObject;  }> {
+    public async updatePayRun (xeroTenantId: string, payRunID: string, payRun: PayRun, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: PayRunObject;  }> {
         const localVarPath = this.basePath + '/PayRuns/{PayRunID}'
             .replace('{' + 'PayRunID' + '}', encodeURIComponent(String(payRunID)));
         let localVarQueryParameters: any = {};
@@ -4791,6 +4842,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -4840,8 +4892,9 @@ export class PayrollUkApi {
      * @param timesheetID Identifier for the timesheet
      * @param timesheetLineID Identifier for the timesheet line
      * @param timesheetLine 
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateTimesheetLine (xeroTenantId: string, timesheetID: string, timesheetLineID: string, timesheetLine: TimesheetLine, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetLineObject;  }> {
+    public async updateTimesheetLine (xeroTenantId: string, timesheetID: string, timesheetLineID: string, timesheetLine: TimesheetLine, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimesheetLineObject;  }> {
         const localVarPath = this.basePath + '/Timesheets/{TimesheetID}/Lines/{TimesheetLineID}'
             .replace('{' + 'TimesheetID' + '}', encodeURIComponent(String(timesheetID)))
             .replace('{' + 'TimesheetLineID' + '}', encodeURIComponent(String(timesheetLineID)));
@@ -4870,6 +4923,7 @@ export class PayrollUkApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
diff --git a/src/gen/api/projectApi.ts b/src/gen/api/projectApi.ts
index c3a0c3af0..05beb0495 100644
--- a/src/gen/api/projectApi.ts
+++ b/src/gen/api/projectApi.ts
@@ -2,7 +2,7 @@
  * Xero Projects API
  * This is the Xero Projects API
  *
- * The version of the OpenAPI document: 2.38.0
+ * The version of the OpenAPI document: 2.40.0
  * Contact: api@xero.com
  *
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
@@ -42,7 +42,7 @@ export enum ProjectApiApiKeys {
 
 export class ProjectApi {
     protected _basePath = defaultBasePath;
-    protected defaultHeaders : any = {'user-agent': 'xero-node-4.35.0'};
+    protected defaultHeaders : any = {'user-agent': 'xero-node-4.36.0'};
     protected _useQuerystring : boolean = false;
     protected binaryHeaders : any = {};
 
@@ -93,8 +93,9 @@ export class ProjectApi {
      * @summary Create one or more new projects
      * @param xeroTenantId Xero identifier for Tenant
      * @param projectCreateOrUpdate Create a new project with ProjectCreateOrUpdate object
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createProject (xeroTenantId: string, projectCreateOrUpdate: ProjectCreateOrUpdate, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Project;  }> {
+    public async createProject (xeroTenantId: string, projectCreateOrUpdate: ProjectCreateOrUpdate, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Project;  }> {
         const localVarPath = this.basePath + '/Projects';
         let localVarQueryParameters: any = {};
         let localVarHeaderParams: any = (<any>Object).assign({}, this.defaultHeaders);
@@ -111,6 +112,7 @@ export class ProjectApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -159,8 +161,9 @@ export class ProjectApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param projectId You can create a task on a specified projectId
      * @param taskCreateOrUpdate The task object you are creating
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createTask (xeroTenantId: string, projectId: string, taskCreateOrUpdate: TaskCreateOrUpdate, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Task;  }> {
+    public async createTask (xeroTenantId: string, projectId: string, taskCreateOrUpdate: TaskCreateOrUpdate, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: Task;  }> {
         const localVarPath = this.basePath + '/Projects/{projectId}/Tasks'
             .replace('{' + 'projectId' + '}', encodeURIComponent(String(projectId)));
         let localVarQueryParameters: any = {};
@@ -183,6 +186,7 @@ export class ProjectApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -231,8 +235,9 @@ export class ProjectApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param projectId You can specify an individual project by appending the projectId to the endpoint
      * @param timeEntryCreateOrUpdate The time entry object you are creating
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async createTimeEntry (xeroTenantId: string, projectId: string, timeEntryCreateOrUpdate: TimeEntryCreateOrUpdate, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimeEntry;  }> {
+    public async createTimeEntry (xeroTenantId: string, projectId: string, timeEntryCreateOrUpdate: TimeEntryCreateOrUpdate, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body: TimeEntry;  }> {
         const localVarPath = this.basePath + '/Projects/{projectId}/Time'
             .replace('{' + 'projectId' + '}', encodeURIComponent(String(projectId)));
         let localVarQueryParameters: any = {};
@@ -255,6 +260,7 @@ export class ProjectApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1007,8 +1013,9 @@ export class ProjectApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param projectId You can specify an individual project by appending the projectId to the endpoint
      * @param projectPatch Update the status of an existing Project
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async patchProject (xeroTenantId: string, projectId: string, projectPatch: ProjectPatch, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body?: any;  }> {
+    public async patchProject (xeroTenantId: string, projectId: string, projectPatch: ProjectPatch, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body?: any;  }> {
         const localVarPath = this.basePath + '/Projects/{projectId}'
             .replace('{' + 'projectId' + '}', encodeURIComponent(String(projectId)));
         let localVarQueryParameters: any = {};
@@ -1031,6 +1038,7 @@ export class ProjectApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1079,8 +1087,9 @@ export class ProjectApi {
      * @param xeroTenantId Xero identifier for Tenant
      * @param projectId You can specify an individual project by appending the projectId to the endpoint
      * @param projectCreateOrUpdate Request of type ProjectCreateOrUpdate
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateProject (xeroTenantId: string, projectId: string, projectCreateOrUpdate: ProjectCreateOrUpdate, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body?: any;  }> {
+    public async updateProject (xeroTenantId: string, projectId: string, projectCreateOrUpdate: ProjectCreateOrUpdate, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body?: any;  }> {
         const localVarPath = this.basePath + '/Projects/{projectId}'
             .replace('{' + 'projectId' + '}', encodeURIComponent(String(projectId)));
         let localVarQueryParameters: any = {};
@@ -1103,6 +1112,7 @@ export class ProjectApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1152,8 +1162,9 @@ export class ProjectApi {
      * @param projectId You can specify an individual project by appending the projectId to the endpoint
      * @param taskId You can specify an individual task by appending the id to the endpoint
      * @param taskCreateOrUpdate The task object you are updating
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateTask (xeroTenantId: string, projectId: string, taskId: string, taskCreateOrUpdate: TaskCreateOrUpdate, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body?: any;  }> {
+    public async updateTask (xeroTenantId: string, projectId: string, taskId: string, taskCreateOrUpdate: TaskCreateOrUpdate, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body?: any;  }> {
         const localVarPath = this.basePath + '/Projects/{projectId}/Tasks/{taskId}'
             .replace('{' + 'projectId' + '}', encodeURIComponent(String(projectId)))
             .replace('{' + 'taskId' + '}', encodeURIComponent(String(taskId)));
@@ -1182,6 +1193,7 @@ export class ProjectApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
@@ -1231,8 +1243,9 @@ export class ProjectApi {
      * @param projectId You can specify an individual project by appending the projectId to the endpoint
      * @param timeEntryId You can specify an individual time entry by appending the id to the endpoint
      * @param timeEntryCreateOrUpdate The time entry object you are updating
+     * @param idempotencyKey This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
      */     
-    public async updateTimeEntry (xeroTenantId: string, projectId: string, timeEntryId: string, timeEntryCreateOrUpdate: TimeEntryCreateOrUpdate, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body?: any;  }> {
+    public async updateTimeEntry (xeroTenantId: string, projectId: string, timeEntryId: string, timeEntryCreateOrUpdate: TimeEntryCreateOrUpdate, idempotencyKey?: string, options: {headers: {[name: string]: string}} = {headers: {}}) : Promise<{ response: http.IncomingMessage; body?: any;  }> {
         const localVarPath = this.basePath + '/Projects/{projectId}/Time/{timeEntryId}'
             .replace('{' + 'projectId' + '}', encodeURIComponent(String(projectId)))
             .replace('{' + 'timeEntryId' + '}', encodeURIComponent(String(timeEntryId)));
@@ -1261,6 +1274,7 @@ export class ProjectApi {
         }
 
         localVarHeaderParams['Xero-Tenant-Id'] = ObjectSerializer.serialize(xeroTenantId, "string");
+        localVarHeaderParams['Idempotency-Key'] = ObjectSerializer.serialize(idempotencyKey, "string");
 
         (<any>Object).assign(localVarHeaderParams, options.headers);
         let localVarUseFormData = false;
diff --git a/src/gen/model/accounting/accountType.ts b/src/gen/model/accounting/accountType.ts
index 012770f76..b8ffeab6b 100644
--- a/src/gen/model/accounting/accountType.ts
+++ b/src/gen/model/accounting/accountType.ts
@@ -20,9 +20,5 @@ export enum AccountType {
     REVENUE = <any> 'REVENUE',
     SALES = <any> 'SALES',
     TERMLIAB = <any> 'TERMLIAB',
-    PAYGLIABILITY = <any> 'PAYGLIABILITY',
-    PAYG = <any> 'PAYG',
-    SUPERANNUATIONEXPENSE = <any> 'SUPERANNUATIONEXPENSE',
-    SUPERANNUATIONLIABILITY = <any> 'SUPERANNUATIONLIABILITY',
-    WAGESEXPENSE = <any> 'WAGESEXPENSE'
+    PAYG = <any> 'PAYG'
 }
diff --git a/src/gen/model/accounting/allocation.ts b/src/gen/model/accounting/allocation.ts
index 2331cf8bb..380d74077 100644
--- a/src/gen/model/accounting/allocation.ts
+++ b/src/gen/model/accounting/allocation.ts
@@ -5,6 +5,10 @@ import { Prepayment } from '././prepayment';
 import { ValidationError } from '././validationError';
 
 export class Allocation {
+    /**
+    * Xero generated unique identifier
+    */
+    'allocationID'?: string;
     'invoice': Invoice;
     'overpayment'?: Overpayment;
     'prepayment'?: Prepayment;
@@ -18,6 +22,10 @@ export class Allocation {
     */
     'date': string;
     /**
+    * A flag that returns true when the allocation is succesfully deleted
+    */
+    'isDeleted'?: boolean;
+    /**
     * A string to indicate if a invoice status
     */
     'statusAttributeString'?: string;
@@ -29,6 +37,11 @@ export class Allocation {
     static discriminator: string | undefined = undefined;
 
     static attributeTypeMap: Array<{name: string, baseName: string, type: string}> = [
+        {
+            "name": "allocationID",
+            "baseName": "AllocationID",
+            "type": "string"
+        },
         {
             "name": "invoice",
             "baseName": "Invoice",
@@ -59,6 +72,11 @@ export class Allocation {
             "baseName": "Date",
             "type": "string"
         },
+        {
+            "name": "isDeleted",
+            "baseName": "IsDeleted",
+            "type": "boolean"
+        },
         {
             "name": "statusAttributeString",
             "baseName": "StatusAttributeString",
diff --git a/src/gen/model/accounting/contact.ts b/src/gen/model/accounting/contact.ts
index 2f4d3b9dd..f4af8e643 100644
--- a/src/gen/model/accounting/contact.ts
+++ b/src/gen/model/accounting/contact.ts
@@ -53,10 +53,6 @@ export class Contact {
     */
     'emailAddress'?: string;
     /**
-    * Skype user name of contact
-    */
-    'skypeUserName'?: string;
-    /**
     * See contact persons
     */
     'contactPersons'?: Array<ContactPerson>;
@@ -223,11 +219,6 @@ export class Contact {
             "baseName": "EmailAddress",
             "type": "string"
         },
-        {
-            "name": "skypeUserName",
-            "baseName": "SkypeUserName",
-            "type": "string"
-        },
         {
             "name": "contactPersons",
             "baseName": "ContactPersons",
diff --git a/src/gen/model/accounting/models.ts b/src/gen/model/accounting/models.ts
index b5bfdc033..fceca9a80 100644
--- a/src/gen/model/accounting/models.ts
+++ b/src/gen/model/accounting/models.ts
@@ -342,6 +342,7 @@ let enumsMap: {[index: string]: any} = {
         "TaxRate.StatusEnum": TaxRate.StatusEnum,
         "TaxRate.ReportTaxTypeEnum": TaxRate.ReportTaxTypeEnum,
         "TaxType": TaxType,
+        "TenNinetyNineContact.FederalTaxClassificationEnum": TenNinetyNineContact.FederalTaxClassificationEnum,
         "TimeZone": TimeZone,
         "TrackingCategory.StatusEnum": TrackingCategory.StatusEnum,
         "TrackingOption.StatusEnum": TrackingOption.StatusEnum,
diff --git a/src/gen/model/accounting/tenNinetyNineContact.ts b/src/gen/model/accounting/tenNinetyNineContact.ts
index ba81d484d..e6f3d2bc7 100644
--- a/src/gen/model/accounting/tenNinetyNineContact.ts
+++ b/src/gen/model/accounting/tenNinetyNineContact.ts
@@ -88,6 +88,18 @@ export class TenNinetyNineContact {
     * Contact contact id
     */
     'contactId'?: string;
+    /**
+    * Contact legal name
+    */
+    'legalName'?: string;
+    /**
+    * Contact business name
+    */
+    'businessName'?: string;
+    /**
+    * Contact federal tax classification
+    */
+    'federalTaxClassification'?: TenNinetyNineContact.FederalTaxClassificationEnum;
 
     static discriminator: string | undefined = undefined;
 
@@ -201,6 +213,21 @@ export class TenNinetyNineContact {
             "name": "contactId",
             "baseName": "ContactId",
             "type": "string"
+        },
+        {
+            "name": "legalName",
+            "baseName": "LegalName",
+            "type": "string"
+        },
+        {
+            "name": "businessName",
+            "baseName": "BusinessName",
+            "type": "string"
+        },
+        {
+            "name": "federalTaxClassification",
+            "baseName": "FederalTaxClassification",
+            "type": "TenNinetyNineContact.FederalTaxClassificationEnum"
         }    ];
 
     static getAttributeTypeMap() {
@@ -208,3 +235,14 @@ export class TenNinetyNineContact {
     }
 }
 
+export namespace TenNinetyNineContact {
+    export enum FederalTaxClassificationEnum {
+        SOLEPROPRIETOR = <any> 'SOLE_PROPRIETOR',
+        PARTNERSHIP = <any> 'PARTNERSHIP',
+        TRUSTORESTATE = <any> 'TRUST_OR_ESTATE',
+        NONPROFIT = <any> 'NONPROFIT',
+        CCORP = <any> 'C_CORP',
+        SCORP = <any> 'S_CORP',
+        OTHER = <any> 'OTHER'
+    }
+}
diff --git a/src/gen/model/finance/problemType.ts b/src/gen/model/finance/problemType.ts
index 916e6035d..9370cac08 100644
--- a/src/gen/model/finance/problemType.ts
+++ b/src/gen/model/finance/problemType.ts
@@ -9,5 +9,6 @@ export enum ProblemType {
     OrganisationOffline = <any> 'organisation-offline',
     RequestTimeout = <any> 'request-timeout',
     ServiceUnavailable = <any> 'service-unavailable',
-    Unauthorized = <any> 'unauthorized'
+    Unauthorized = <any> 'unauthorized',
+    RateLimitError = <any> 'rate-limit-error'
 }
diff --git a/src/gen/model/payroll-au/leavePeriodStatus.ts b/src/gen/model/payroll-au/leavePeriodStatus.ts
index 73caa375d..116223bf6 100644
--- a/src/gen/model/payroll-au/leavePeriodStatus.ts
+++ b/src/gen/model/payroll-au/leavePeriodStatus.ts
@@ -1,5 +1,7 @@
 
 export enum LeavePeriodStatus {
     SCHEDULED = <any> 'SCHEDULED',
-    PROCESSED = <any> 'PROCESSED'
+    PROCESSED = <any> 'PROCESSED',
+    REQUESTED = <any> 'REQUESTED',
+    REJECTED = <any> 'REJECTED'
 }