Unfortunately that has happened as well. I used to work in the business so I've worked with these companies quite a bit. Actually I still consult in the business http://forum.brewerfan.net/images/smilies/smile.gif While using a company like JSA, PSA, et al.. is a good starting point and they certainly are above board, if I was looking to buy (or sell) a valuable sig I would have it authenticated by 2-3 companies. Obviously the only way to be 100% sure is to witness the signing yourself but have multiple independent analysis will get you the right result 99% of the time.