How to add completion notification automatically in Express ECO when Express ECO is saved?

Hi Angelalp, 

Finally, I found how to solve it. 

When I use identity ID instead of user ID, I could add complete notification automatically. 

As you said, Express ECO Notification is customed one. I didn't know that. 

So, it is right you never heard about it. 

Anyway, thank you so much for your interest on my issue. I appreciate it.

var new_Compeletion_notification = inn.newItem("Express ECO Notification", "add");
new_Compeletion_notification.setProperty("source_id" , exp_eco_id);
new_Compeletion_notification.setProperty("related_id" , "8CC42C5770DE42A898EAEBF55091B824"); 
Item result = new_Compeletion_notification.apply();