diff --git a/RFXtoRP_HsrCarrierApt_SiteForceBookAppointment.ftl b/RFXtoRP_HsrCarrierApt_SiteForceBookAppointment.ftl
index 3120403..6c72e5d 100644
--- a/RFXtoRP_HsrCarrierApt_SiteForceBookAppointment.ftl
+++ b/RFXtoRP_HsrCarrierApt_SiteForceBookAppointment.ftl
@@ -111,7 +111,11 @@
 				<#if carrier_apt.appointment_designation?? && carrier_apt.appointment_designation!="">
 					"Reason": "${carrier_apt.appointment_designation?json_string}",
 				<#else>
-					"Reason": "${carrier_apt.appointment_reference?json_string}",
+					<#if carrier_apt.appointment_reference?? && carrier_apt.appointment_reference!="">
+						"Reason": "${carrier_apt.appointment_reference?json_string}",
+					<#else>
+						"Reason": "${carrier_apt.year_number}-${carrier_apt.appointment_number}",
+					</#if>
 				</#if>
 			</#if>
 		</#if>
diff --git a/RFXtoRP_HsrCarrierApt_UpdateAppointment.ftl b/RFXtoRP_HsrCarrierApt_UpdateAppointment.ftl
index 1f2f858..1f40a65 100644
--- a/RFXtoRP_HsrCarrierApt_UpdateAppointment.ftl
+++ b/RFXtoRP_HsrCarrierApt_UpdateAppointment.ftl
@@ -109,7 +109,11 @@
 			<#if carrier_apt.appointment_designation?? && carrier_apt.appointment_designation!="">
 				"Reason": "${carrier_apt.appointment_designation?json_string}",
 			<#else>
-				"Reason": "${carrier_apt.appointment_reference?json_string}",
+				<#if carrier_apt.appointment_reference?? && carrier_apt.appointment_reference!="">
+					"Reason": "${carrier_apt.appointment_reference?json_string}",
+				<#else>
+					"Reason": "${carrier_apt.year_number}-${carrier_apt.appointment_number}",
+				</#if>
 			</#if>
 		</#if>
 	</#if>