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

president of leading grading company Professional Sports Authenticator (PSA), to answer questions that a lot of collectors have on their minds. Understanding what card grading is and how it has ...

PSA specializes in authenticating memorabilia and grading sports cards. The app can verify if a card’s already been graded — and if it hasn’t, it walks you through how to submit one.

If you're an NBA card collector, here is your dream team. Professional Sports Authenticator ... it makes the trip to and from ...

Fleer’s Metal Universe is one of the most appreciated basketball sets of the 1990s and known for its ultra-rare and highly ...