diff --git a/RFXtoRP_HsrCarrierApt_SiteForceBookAppointment.ftl b/RFXtoRP_HsrCarrierApt_SiteForceBookAppointment.ftl
index 29d17cf..fc151c7 100644
--- a/RFXtoRP_HsrCarrierApt_SiteForceBookAppointment.ftl
+++ b/RFXtoRP_HsrCarrierApt_SiteForceBookAppointment.ftl
@@ -51,7 +51,11 @@
 				<#list carrier_apt.physical_receipt_list as physical_receipt>
 				{
 					"ActorID": "${RFXtoRPprefixDepot(carrier_apt.physical_depot?json_string)}",
-					"OrderID": "${physical_receipt.physical_receipt_reference?json_string}",
+					<#if physical_receipt.physical_receipt_reference?? && physical_receipt.physical_receipt_reference!="">
+						"OrderID": "${physical_receipt.physical_receipt_reference?json_string}",
+					<#else>
+						"OrderID": "R${carrier_apt.physical_depot?json_string}${physical_receipt.receipt_activity?json_string}${physical_receipt.originator_code?json_string}${physical_receipt.receipt_year}${physical_receipt.receipt_number}",
+					</#if>
 					"ProjectID": "${projectRP}",
 					"Quantities": [
 					{