Collect the signature. Own the story.

For signed sports memorabilia, collectors often look for recognized authentication from companies such as PSA/DNA, Beckett Authentication Services, JSA, Fanatics, Upper Deck, or official league/team witnessed programs where applicable. The best option depends on the athlete, sport, item type, and signing context.

Not always. A COA is only as strong as the company or source behind it. A generic certificate from an unknown seller is not the same as a verifiable certification number, hologram, letter of authenticity, witnessed signing record, or official program database entry.

For signed memorabilia, collectors should look at ink strength, fading, smudging, surface wear, staining, creasing, ball toning, jersey pulls, photo damage, helmet scuffs, and whether the signature is cleanly placed and visible.