Thanks for being a part of WWDC25!

How did we do? We’d love to know your thoughts on this year’s conference. Take the survey here

Why do we need the Transfer Identifier?

Hello, for applications using Signin with Apple feature, it seems a particular process needs to be followed when you want to transfer the app to a new owner.

Generating transfer identifier before the transfer of ownership to identify a particular user.

There is already "email" registered for the user, personal email or relay email (doesn't matter). Why would we need to trouble ourselves with the transfer identifier?

The documentation doesn't explain anything about the background of this. It is very weak. It doesn't explain the impacts/changes when app is transferred so that one can fully understand its impact.

Thank you.

Why do we need the Transfer Identifier?
 
 
Q