I have a list that contains authorities, authorized person, and delegatee. Authorized person can delegate his/her authority to anyone. I want to add a notification that is when he/she delegates, he and the delegatee receive email notification. There are more than 15 authorized persons, so how can I do this whithout using sharepoint designer?
You could try using the alerts, but out-of-the-box, any user subscribed to alerts will get notified of any changes done on any item.
You could try something like this in item added and item updated event receivers. However that would be an overkill.
Or, you could send an email directly from ItemUpdated event receiver using