[olsport]

PSA should use technology like todays currency in there certificates like watermarks, threads, special paper. Even then, the crooks could buy a real ball, make a fake ball, and use the real certificate with the fake ball, fake sticker. Too many ways to be a crook in sports memorabilia (or any other hobby)these days. Also, how can the authenticators be 100% certain something is real. We all know, they can't, especially if the dishonest crook is an expert at fakery.
That's the problem with anything that becomes valuable. Look at all the paintings that have been faked throughout history. A jeweler in my area got busted for replacing people's real diamonds with CZ's, when they brought them in for cleaning, ect.