A word to describe "quit original group and join another group"

Question

I want to use some kind of noun form to describe

the request from a member that quit his original group and join a new group.

And I tried to create the word by myself (which doesn't look so "english" but helps you understand my purpose) like so :

group switching request

group changing request

Are there any better options ? Looking forward to your suggestions!

Answer 1

In a formal sense, I would use:

transfer request