Trading Card Glossary › Grading & Authentication
LOA
Also known as: Letter of Authenticity, certificate of authenticity, COA
A Letter of Authenticity (LOA) is an official document issued by a recognized authentication company or expert certifying that an autograph, memorabilia item, or trading card is genuine. Major LOA providers for sports memorabilia include JSA (James Spence Authentication) and Beckett Authentication Services (BAS). Cards and memorabilia with a full LOA from a reputable authenticator are far more valuable and trustworthy than items sold without authentication.
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