diff --git a/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/request/UpdatedOrder.kt b/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/request/UpdatedOrder.kt
index 9560f0d8..3953c5cc 100644
--- a/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/request/UpdatedOrder.kt
+++ b/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/request/UpdatedOrder.kt
@@ -95,7 +95,7 @@ data class UpdatedOrder(
 	val orderExtraFields: List<OrderExtraFields>? = null,
 	val paymentReference: String? = null,
 	val loyalty: Loyalty? = null,
-	val customerFiscalCode: String? = "",
+	val customerFiscalCode: String? = null,
 
 ) : ApiUpdatedDTO {
 
diff --git a/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/result/FetchedOrder.kt b/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/result/FetchedOrder.kt
index 2deab79f..435060e2 100644
--- a/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/result/FetchedOrder.kt
+++ b/src/main/kotlin/com/ecwid/apiclient/v3/dto/order/result/FetchedOrder.kt
@@ -116,7 +116,7 @@ data class FetchedOrder(
 	val paymentReference: String? = null,
 	val shippingLabelAvailableForShipment: Boolean = false,
 	val loyalty: Loyalty? = null,
-	val customerFiscalCode: String? = "",
+	val customerFiscalCode: String? = null,
 
 	) : ApiFetchedDTO {