Notification of Request by Another User
If a user submits a request on your behalf, it's displayed in your request feed with a message that reads "Submitted on your behalf by," with the name of the user who submitted the request.
My Access Request Feed when Another User Submits the Request
Business Benefit
The user for whom the request is made can now know the source of the request.
Steps to Enable
You don't need to do anything to enable this feature.