I have found an autograph authenticated by a Joe Masson from Rushill, Indiana. Would anyone know how reputable such a person is? Have you encountered them before?
Personally, I've never heard of him. If Google isn't bringing up anything helpful, it's a fair assumption that he isn't a significant player in this hobby.
Thanks for your reply Rich. That is what I was thinking too. It is an autograph going for auction in Ireland. I contacted the auction house about provenance and they replied that it is certified by this Joe Masson. It is a Muhammad Ali signature, reputedly. It is a very reputable auction house, but I could find no mention whatsoever of a Joe Masson on the web.