[glchen]

As other have said, the main auto authenticators are PSA/DNA and JSA. However, Beckett and SGC also authenticate autographs, and the actual authenticators sometimes move among the four. In addition, there are many examples of autos that one service has rejected, which another one has passed. Saying all of that, PSA/DNA or JSA are the services that most regular collectors want authenticating their autos, so if an auto is known to have failed both of these services, the price it sells for will likely be less than if one of those two had passed it. Again, the caveat, of course is, there are many examples of autos that both PSA/DNA and JSA are believed to have incorrectly passed, if you go to the Autograph section of N54.