I think that you have a good chance of getting something back...kinda. The JoBros are known not to sign, but they have a new youtube video on there official account showing them sign fanmail...so maybe.

Hi. I recently sent autograph requests to the Jonas Brothers via venue to 3 different addresses. Now I really feel very greedy. On all the requests I requested 1 for me, and one for another friend. I put a note at the bottom that if they already got this letter at another address, they should make the autograph out to my friend. I know it sounds very greedy, but I was so afraid that the arenas wouldn't pass them on. (None of them were on the list for arenas who forward fanmail) What should I do next time? What if I want an autograph but I also want to get one for a friend? Do I have any chance of still getting anything back?

EDIT: I requested an autograph for 3 different friends. (one friend at each address)