PSA/DNA is the autograph authentication arm of Professional Sports Authenticator (PSA), a leading United States third-party authentication company established in 1991 and operating under Collectors Holdings, Inc. It is a premium-tier authenticator of signed sports memorabilia. For collectors, PSA means PSA/DNA here: the authentication of signed shirts and memorabilia, not the trading-card grading the wider PSA business is best known for.
How PSA/DNA authenticates
PSA/DNA launched in 1999 and authenticates a signature through a structured four-step examination, comparing it against known authentic exemplars and applying forensic analysis. For signed memorabilia it can also apply PSA/DNA's tamper-evident DNA-marker, an invisible synthetic marker that ties an item to its certification. There is no single named authenticator; PSA/DNA operates as a bureau, and its certification rests on that process rather than on one signer.
What you receive and how to verify it
Independent verification is the point: a collector can confirm any PSA or PSA/DNA certificate by entering its certification number in PSA's online Certification Verification tool at psacard.com, without trusting Walkouts. An authenticated item receives a PSA/DNA certification, and signed memorabilia carries PSA/DNA's tamper-evident DNA-marker, an invisible synthetic marker tying the item to that certificate record.
Why this matters for collectors
For a collector weighing a high-value signed piece, a PSA/DNA opinion is a bureau-scale, forensically-backed judgment a buyer can verify independently, the DNA-marker and the online certificate lookup together meaning the assurance does not rest on trust. Walkouts uses PSA/DNA as a premium authentication route for signed items, the kind of independent, checkable opinion that carries weight at the top of the market. PSA operates from Southern California and serves collectors worldwide.
