uhm maby you sell your signature with full rights and you send him your psd, and the full rights mean that he bought it and you don't may wear the signature any more or sell the signature... and he may say that he made it..
full rights is that he can wear the sig, sell it etc u also have learning rights, claim rights, wearing rights so full rights are all those maybe i left out some
Full Rights = you can do antyhing u want with the signature But you can only sell 1 person for full rights ..