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The Foundation of All Great Collections.
Professional Sports Authenticator (PSA) is the largest and most trusted third-party trading card authentication and grading company in the world. Since its inception in 1991, PSA has certified over 40 million cards and 收藏品 with a cumulative declared value of over a billion dollars.
PSA is a division of 收藏家的宇宙, which has offices in California, 新泽西, 巴黎, 香港, 上海和东京.
As the only third-party grading service to offer a guarantee on its services, PSA has emerged as the clear leader in authentication and grading for trading cards and other 收藏品.