When a request is prepared by one user on behalf of another (that is, when the requester and the preparer are different), the notification is sent to the preparer, not the requester.

When someone modifies a request that has already been submitted for approval, Ariba Buyer sends an email notification message to the requester. The message indicates who changed the request.

This is a courtesy message to inform you of the request's progress through the approval process. It does not require any action on your part.