They'll talk to you, I guess this won't be a problem. Just say 'yes, this is me' and confirm some sort of personal information if asked.
In my college, we have a thing called 'social name', actually the whole country uses this denomination. It's the name you chose, but not your legal name. So, in college, you have your chosen name in the docs that are just for internal use of the college. The external docs are in our legal name. That way, we don't have problems when we need the docs to prove that we go to college or something like that.