How do you get a Roger Clemens autographed baseball authenticated?

Answer 1

Signatures that have been properly authenticated will sell at a higher price than not. Two of the top, and most trusted authenticators are PSA/DNA, and James Spence Authentic (JSA). Collectors will pay more for signatures authenticated by either one. It may sound odd but in some cases PSA/DNA, and JSA authenticated signatures may sell higher than a Letter of authenticity from an unknown or less trusted authenticator that witnessed the signing even though PSA/DNA, and JSA did not. It's just a matter of collectors trust, and collectors will pay more for it. I would not recomend anyone else. I will leave links for the sites on this page. Check their Show Schedule to see when they will be in the area that you live. They also do business through the mail. Keep in mind that if you do not have a letter of authenticity from a respectible company you could land up with half the market value when you sell the ball.