Professional autograph authentication you can verify for life
MAS certifies signed collectibles with the strongest standard in the hobby — live, in-person witnessed certification — plus instant digital verification and publicly verifiable Certificates of Authenticity.
Witnessed, in-person certification
The most trusted autographs are the ones that were watched being signed. At conventions, private signings and in-store events, an MAS authenticator is physically present at the moment of signing. There's no opinion and no guesswork — the item is certified authentic with full confidence, then tied to a unique, publicly verifiable record.
- Observed first-hand at the signing
- Unique serial number & tamper-evident sticker
- Free, real-time public verification
- Optional digital or physical Letter of Authenticity
What we authenticate
Across sports, entertainment, music, anime & pop culture.
From submission to verified for life
Submit or attend
Mail your item in, request an instant digital review, or have it authenticated live at a convention or signing.
Expert examination
Our specialists review the signature — and for witnessed items, our authenticator observed the signing first-hand.
Certification issued
Your item receives a unique serial number, a tamper-evident COA sticker, and an optional Letter of Authenticity.
Verified for life
Anyone can confirm your certificate for free, in real time, at the public MAS COA lookup.
Ready to certify your collection?
Submit online, get an instant digital review, or find us live at an upcoming event.