PSA has refused to grade multiple Messi autographed cards, even telling one collector his card could have been signed by ...

Authenticators will place hologram stickers on bottles of dirt, a lucrative enterprise for MLB. Topps, whose main cutting ...

and that many of the autographs on the market at that time were deemed fake. "The idea of the program was born at that point," Posner said. Michael Posner, MLB's director of authentication ...