diff --git a/RFXtoRP_HsaItmLv_LogisticVariantUpdated.ftl b/RFXtoRP_HsaItmLv_LogisticVariantUpdated.ftl
index 81560f3..c61e73b 100644
--- a/RFXtoRP_HsaItmLv_LogisticVariantUpdated.ftl
+++ b/RFXtoRP_HsaItmLv_LogisticVariantUpdated.ftl
@@ -16,8 +16,8 @@
           "Codes": [
                    <#list lv.id_list as id>
                    {
-                      "Key":   "${id.logistical_variant_ID_type_code?json_string!""}",
-                      "Value": "${id.logistical_variant_ID_code?json_string!""}"
+                      "Key":   "${(id.logistical_variant_ID_type_code!"")?json_string}",
+                      "Value": "${(id.logistical_variant_ID_code!"")?json_string}"
                    }<#sep>,</#sep>
                      </#list>
                    ],
diff --git a/RFXtoRP_HsaItm_ItemCreated.ftl b/RFXtoRP_HsaItm_ItemCreated.ftl
index 6ef16c0..a8ce5c9 100644
--- a/RFXtoRP_HsaItm_ItemCreated.ftl
+++ b/RFXtoRP_HsaItm_ItemCreated.ftl
@@ -39,8 +39,8 @@
             "Codes": [
                        <#list logistical_variant.id_list as id>
                        {
-                          "Key":   "${id.logistical_variant_ID_type_code?json_string!""}",
-                          "Value": "${id.logistical_variant_ID_code?json_string!""}"
+                          "Key":   "${(id.logistical_variant_ID_type_code!"")?json_string}",
+                          "Value": "${(id.logistical_variant_ID_code!"")?json_string}"
                        }<#sep>,</#sep>
                          </#list>
                        ],
diff --git a/RFXtoRP_HsrPro_ExecutionflowDetected.ftl b/RFXtoRP_HsrPro_ExecutionflowDetected.ftl
index d1f4107..1de6b02 100644
--- a/RFXtoRP_HsrPro_ExecutionflowDetected.ftl
+++ b/RFXtoRP_HsrPro_ExecutionflowDetected.ftl
@@ -52,23 +52,23 @@
           <#else>
             "Actor":
              {
-              "Name" : "${preparation_order.address.name_or_company_name?json_string!""}",
+              "Name" : "${(preparation_order.address.name_or_company_name!"")?json_string}",
               "Address" :
                 {
-                 "City" : "${preparation_order.address.post_code_area_name?json_string!""}",
+                 "City" : "${(preparation_order.address.post_code_area_name!"")?json_string}",
                  "CountryCode" : "${preparation_order.address.iso_country_code!""}",
                  "PostalCode" : "${preparation_order.address.postal_code!""}",
-                 "StreetAddressOne" : "${preparation_order.address.street_and_number_and_po_box?json_string!""}",
-                 "StreetAddressTwo" : "${preparation_order.address.additional_address_data_1?json_string!""}",
-                 "StreetAddressThree" : "${preparation_order.address.additional_address_data_2?json_string!""}"
+                 "StreetAddressOne" : "${(preparation_order.address.street_and_number_and_po_box!"")?json_string}",
+                 "StreetAddressTwo" : "${(preparation_order.address.additional_address_data_1!"")?json_string}",
+                 "StreetAddressThree" : "${(preparation_order.address.additional_address_data_2!"")?json_string}"
                  }
                   },
               "Contact" :
                 {
-                  "FirstName" : "${preparation_order.address.first_name?json_string!""}",
-                  "LastName" : "${preparation_order.address.last_name?json_string!""}",
-                  "Emails" : ${splitEmailsIntoArray(preparation_order.address.mail_address!""?json_string)},
-                  "Phones" : ["${preparation_order.address.mobile_phone_number?json_string!""}","${preparation_order.address.land_line_phone_number?json_string!""}", "${preparation_order.address.fax_number?json_string!""}" ]
+                  "FirstName" : "${(preparation_order.address.first_name!"")?json_string}",
+                  "LastName" : "${(preparation_order.address.last_name!"")?json_string}",
+                  "Emails" : ${splitEmailsIntoArray((preparation_order.address.mail_address!"")?json_string)},
+                  "Phones" : ["${(preparation_order.address.mobile_phone_number!"")?json_string}","${(preparation_order.address.land_line_phone_number!"")?json_string}", "${(preparation_order.address.fax_number!"")?json_string}" ]
                 }
           </#if>
          },
diff --git a/RPtoRFX_PrepOrder.ftl b/RPtoRFX_PrepOrder.ftl
index 3616f05..a33d6d5 100644
--- a/RPtoRFX_PrepOrder.ftl
+++ b/RPtoRFX_PrepOrder.ftl
@@ -15,7 +15,7 @@
 </#if>
 
 {
-	"id" : {"refid" : "${executionflow.OrderID}"},
+	"id" : {"refid" : "${executionflow.OrderID?json_string}"},
 	"route" : "rest/public/v1/activities/{activity_code}/physical_depots/{physical_depot_code}/originators/{originator_code}/preparation_orders",
 	"method" : "POST",
 	"uri_substitutions": {
@@ -25,7 +25,7 @@
 	},
 	"payload" :
 	 {
-		"originator_reference": "${executionflow.OrderID}",
+		"originator_reference": "${executionflow.OrderID?json_string}",
 		"preparation_type_code": "${preparation_type_code}",
 		"end_consignee_code": "${actorID}",
 		<#if executionflow.RequestedMilestones?? && executionflow.RequestedMilestones.RequestedDeliveryDateTime??>
@@ -52,21 +52,21 @@
 				"title_code" : "${titlecode}",
 				"contact_type_code" : "${contacttypecode}",
 				"address_type_code" : "${adresstypecode}",
-				"first_name": "${executionflow.ShipTo.Contact.FirstName!""?json_string}",
-				"last_name" :"${executionflow.ShipTo.Contact.LastName!""?json_string}",
-				"name_or_company_name" : "${executionflow.ShipTo.Contact.FirstName!""?json_string} ${executionflow.ShipTo.Contact.LastName!""?json_string}",
+				"first_name": "${(executionflow.ShipTo.Contact.FirstName!"")?json_string}",
+				"last_name" :"${(executionflow.ShipTo.Contact.LastName!"")?json_string}",
+				"name_or_company_name" : "${(executionflow.ShipTo.Contact.FirstName!"")?json_string} ${(executionflow.ShipTo.Contact.LastName!"")?json_string}",
 				<#if executionflow.ShipTo.Contact.Emails?? && executionflow.ShipTo.Contact.Emails[0]!="">
 					"mail_address": "${executionflow.ShipTo.Contact.Emails[0]}",
 				</#if>
 				<#if executionflow.ShipTo.Contact.Phones?? && executionflow.ShipTo.Contact.Phones[0]!="">
 					"mobile_phone_number": "${executionflow.ShipTo.Contact.Phones[0]}",
 				</#if>
-				"street_and_number_and_po_box": "${executionflow.ShipTo.Actor.Address.StreetAddressOne!""?json_string}",
-				"additional_address_data_1": "${executionflow.ShipTo.Actor.Address.StreetAddressTwo!""?json_string}",
-				"additional_address_data_2": "${executionflow.ShipTo.Actor.Address.StreetAddressThree!""?json_string}",
-				"postal_code": "${executionflow.ShipTo.Actor.Address.PostalCode!""}",
-				"post_code_area_name" : "${executionflow.ShipTo.Actor.Address.City!""}",
-				"iso_country_code": "${executionflow.ShipTo.Actor.Address.CountryCode!""}"
+				"street_and_number_and_po_box": "${(executionflow.ShipTo.Actor.Address.StreetAddressOne!"")?json_string}",
+				"additional_address_data_1": "${(executionflow.ShipTo.Actor.Address.StreetAddressTwo!"")?json_string}",
+				"additional_address_data_2": "${(executionflow.ShipTo.Actor.Address.StreetAddressThree!"")?json_string}",
+				"postal_code": "${(executionflow.ShipTo.Actor.Address.PostalCode!"")?json_string}",
+				"post_code_area_name" : "${(executionflow.ShipTo.Actor.Address.City!"")?json_string}",
+				"iso_country_code": "${(executionflow.ShipTo.Actor.Address.CountryCode!"")?json_string}"
 			}
 		</#if>
 		<#if executionflow.Lines??>
diff --git a/RPtoRFX_Receipt.ftl b/RPtoRFX_Receipt.ftl
index 2125ae5..80eafaa 100644
--- a/RPtoRFX_Receipt.ftl
+++ b/RPtoRFX_Receipt.ftl
@@ -1,7 +1,7 @@
 <#include "RPtoRFX_Receipt_DefaultHeaderData.ftl">
 
 {
-	"id" : {"refid" : "${executionflow.OrderID}"},
+	"id" : {"refid" : "${executionflow.OrderID?json_string}"},
 	"route" : "rest/public/v1/activities/{activity_code}/physical_depots/{physical_depot_code}/originators/{originator_code}/receipts",
 	"method" : "POST",
 	"uri_substitutions": {
@@ -11,7 +11,7 @@
 	},
 	"payload" : 
 	 {
-		"receipt_reference": "${executionflow.OrderID}",
+		"receipt_reference": "${executionflow.OrderID?json_string}",
 		"receipt_type":        "${receipt_type}",
 		"receipt_reason_code": "${receipt_reason_code}", 
 		"work_mode_code" :     "${work_mode_code}",