What form do I get filled to show some one can sponser me in US. I have been on F1 visa and want to bring my wife on F2. I have submitted my employment letter, and my bank statement. but they keep denying her. Their query is always regarding financial resources. Now my brother who has been here in US for 5 yrs wants to give some kind of sponsor letter. What form is that? Plz let me know, will this work?