Originally Posted by sara58
My brother is married to a girl who is american citizen but he is still in my homecountry (Iran). Now he is going to do his USMLE exam and he gave them his wife address. They ask himto affidavit that he has changed his address to his wife address. Does it cause any problem for him?
You need to consult the U.S. government's rules:
USCIS Home Page
Or use an 800 phone number on that site to speak with someone and explain the situation.