How to restrict preparer to receive goods and services

Summary:
We would like to restrict the preparer to do the receive on behalf of the request in RSSP. Our organization will normally ask the admin staff to create PR on behalf of the requester. But we want to control only the requester can do the receipt for my own PR. I see something below in implementing manufacturing and supply chain management 25A. When I try created PR by user 1 and requester is user 2. I login user 1 using my receipt (new). User 1 still able to do receipt for PR although requester is user 2. In this