Professional Sports Authenticator (PSA), a division of publicly held Collectors Universe (NASDAQ: CLCT), is the world's leading and largest third-party trading card authentication service. PSA's unbiased group of the hobby's most experienced sports card grading experts ensure that all submitted cards are properly graded and carefully preserved. PSA's permanent grading standard is recognized industry-wide as the best possible form of consumer protection. In fact, PSA's grading standards realize full value in the market place and its tamper-evident card capsule offers the most visually appealing form of safe card storage known. Founded in 1991, PSA has graded over 12 million cards. While PSA set the standard for grading trading cards, counterfeiting, forgery, and piracy of high-value collectible products reached epidemic proportions world-wide. Collectors of autographed sports memorabilia became increasingly uneasy about their purchases. It was a natural move for PSA to combat the problem just as it had done many years ago with trading cards.

Therefore in 1998, PSA initiated PSA/DNA. PSA/DNA is the world's leading third party autograph authentication company. Using state of the art technology, PSA/DNA created a four-level security system to prevent counterfeiting, forgery and piracy of high-value collectibles. In fact, PSA/DNA has been used to authenticate many historically significant sports items that include: Shoeless Joe Jackson's Bat, Super Bowl Game-Used footballs since 1999, 1999 World Series Baseballs and Bases, Mark McGwire's 1998 70th Home Run Baseball, and the list goes on. PSA/DNA not only authenticates autographs/events witnessed in the presence, but also previously signed memorabilia. Our years of expertise and knowledge in the trade have established an impeccable reputation for providing professional, unbiased, expert opinions. In addition to grading and authenticating autographed baseballs and other memorabilia, we also offer Professional Bat Authentication and Grading using the same state of the art technology.

The World's Finest Collectibles are Authenticated by PSA/DNA!