Originally Posted by
JackDaw
Sympathy, of course.
A couple of friends were serious signature collectors, and both said that establishing provenance was problematical in most cases. Certainly the "certificate of authenticity" produced by many sellers can be a joke. Yes, it means a lot if the signer is well known in the trade, and has a reputation built up over years for cast iron integrity. But such certificates mean nothing if it's just signed by a general dealer, or anyone with a flaky rep.
Ultimately if you saw the guy sign it in front of you...you know its a genuine signature 100%. Anything else and that 100% falls...send something to be signed in a star's changing room, and one of his mates might help him out by signing, for example.
The guy I know who built biggest collection (mainly of football and cricket signatures) mainly did it in two ways...getting signatures face to face (at matches, training grounds, etc) and by just sending prepared cards to cricket and football clubs with a stamped addressed envelope. No offer of payment for the signatures! ("If a guy wants paying for his signature, he's a wassock anyway, however famous he is")
Replies from footballers tended to be scant (and I guess would be near zero nowadays when game has been relentlessly commercialised), but the vast majority of cricketers were happy to sign.