diff --git a/packages/@aws-cdk/custom-resource-handlers/lib/aws-s3/notifications-resource-handler/index.py b/packages/@aws-cdk/custom-resource-handlers/lib/aws-s3/notifications-resource-handler/index.py
index ce22358f9ee2d..ea3df6a2334c1 100644
--- a/packages/@aws-cdk/custom-resource-handlers/lib/aws-s3/notifications-resource-handler/index.py
+++ b/packages/@aws-cdk/custom-resource-handlers/lib/aws-s3/notifications-resource-handler/index.py
@@ -35,8 +35,13 @@ def handle_managed(request_type, notification_configuration):
   return notification_configuration
 
 def handle_unmanaged(bucket, stack_id, request_type, notification_configuration, old):
+  def get_id(n):
+    n['Id'] = ''
+    strToHash=json.dumps(n, sort_keys=True).replace("'Name:' 'prefix'", "'Name:' 'Prefix'").replace("'Name:' 'suffix'", "'Name:' 'Suffix'")
+    return f"{stack_id}-{hash(strToHash)}"
+    
   def with_id(n):
-    n['Id'] = f"{stack_id}-{hash(json.dumps(n, sort_keys=True))}"
+    n['Id'] =  get_id(n)
     return n
 
   # find external notifications
@@ -45,9 +50,9 @@ def with_id(n):
   for t in CONFIGURATION_TYPES:
     if request_type == 'Update':
         ids = [with_id(n) for n in old.get(t, [])]
-        old_incoming_ids = [n['Id'] for n in ids]
+        old_incoming_ids = [get_id(n) for n in old.get(t, [])]
         # if the notification was created by us, we know what id to expect so we can filter by it.
-        external_notifications[t] = [n for n in existing_notifications.get(t, []) if not n['Id'] in old_incoming_ids]
+        external_notifications[t] = [n for n in existing_notifications.get(t, []) if not get_id(n) in old_incoming_ids]
     elif request_type == 'Create':
         # if this is a create event then all existing notifications are external
         external_notifications[t] = [n for n in existing_notifications.get(t, [])]