diff --git a/README.md b/README.md
index 0f3a803..45e7843 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,7 @@ Send a SOAP message for the given operation
     "wsdlUrl": "http://example.com/service.wsdl",
     "wsdlOperation": "IE4N03notifyERiskAnalysisHit",
     "messageBody": "<IE4N03 xmlns=\"urn:wco:datamodel:WCO:CIS:1\">...</IE4N03>",
+    "confirmationOfDelivery", true
     "addressing": {
         "from": "ICS_NES",
         "to": "ICS_CR",
@@ -59,6 +60,7 @@ Send a SOAP message for the given operation
 | `wsdlUrl` | The URL of the WSDL where the operation is defined |
 | `wsdlOperation` | The operation to be used in the SOAP envelope |
 | `messageBody` | The XML message to send in the SOAP envelope |
+| `confirmationOfDelivery` | An optional boolean specifying whether the sender wishes to receive a confirmation of delivery from the target SOAP service. Defaults to false if not provided in the request |
 | `addressing` | Optional property to provide WS addressing data |
 | `addressing.from` | This optional property provides the value for the `From` element in the SOAP header |
 | `addressing.to` | This optional property provides the value for the `To` element in the SOAP header |