server/AyaNova/biz/NotifySubscriptionBiz.cs

@@ -231,6 +231,10 @@ namespace AyaNova.Biz
                 }
             }
 
+            if(proposedObj.DeliveryMethod==NotifyDeliveryMethod.App && !string.IsNullOrEmpty(proposedObj.DeliveryAddress)){
+                AddError(ApiErrorCode.VALIDATION_INVALID_VALUE, "DeliveryAddress","In app delivery should not specify a delivery address");
+            }
+
 
         }