M.A.S. Authentication

Upstate Convention Consignments & Autographs Verified independent store

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MAS Authentication is a leading authority in Autograph Authentication, debuting in 2023 with a collective experience of over 30 years. Specializing in private signings with celebri ties, on-site convention authentication, and in-store signings at comic book stores nationwide, we are dedicated to delivering unparalleled expertise and reliability in verifying the authenticity of autographs. Our commitment to excellence and extensive industry knowledge make us the trusted choice for collectors and enthusiasts seeking assurance and integrity in their autographed memorabilia. Show more