Sorry for the delayed response, but you could always try him VV. He doesn't really seem like the type of guy who would sign VV, but it's worth a shot

You can try this address. He also has a website, and you may be able to find something there.

Wiz Khalifa
Rostrum Records, Llc.
99 Saint Marks Pl
Apt 6E
New York, NY 10009
USA

Ok my fav rapper ever is Wiz Khalifa and iv always wanted his autograph but i dont think he even touches his mail! Iv seen videos of him always having autograph signings and stuff but they never have them even close to where i live, i did go to one of his concerts a couple of weeks ago and it was AMAZING, but there was no way to even geting close to him b4 or after the concert. If any one has any way of getting one ether by Mail or you have one your willing to sell it or something or if you know him. That would be amazing!! so please let me know people thanks soo much!! {up} :D