VerifyMarkForensic Autograph Authentication
What's hiding in
the handwriting?
Drag to reveal what forensic science sees that the naked eye misses.
Authentication Stories
Every signature has a story.
We find the truth in it.
The Estate Sale Bombshell
A signed Hemingway first edition, consigned by an executor who inherited it from her late uncle. The ink fluoresced wrong under 365nm — applied forty years after publication.
The DiMaggio Ball
A dealer at a Chicago memorabilia show brought in a 1951 World Series ball signed by Joe DiMaggio. Pressure mapping matched 11 known exemplars. Certificate issued in 48 hours.
Grandmother's Autograph Book
A 1938 Hollywood starlet autograph book, gifted as a holiday heirloom. Fourteen signatures authenticated across three studios. All genuine. All now insured.
Christie's Pre-Auction Rush
A consignor with a Picasso sketch signed on a café napkin needed authentication before the October deadline. Auction urgent processing. Result: 36 hours.
The Signed Vinyl Trap
A collector paid $4,200 for a Bowie LP signed at a 1974 Hammersmith show. The autopen pattern gave it away in 90 seconds. Refund secured; dealer reported.
The Letters from the Trenches
An estate executor in Ohio found 23 letters signed by a WWI general. Each signature authenticated against military archive exemplars. Family history confirmed.
That Signed Vinyl You Inherited
Maybe it's your mother's Beatles album, your uncle's Ali photo, or a mystery signature in a paperback. We've seen everything. Bring it.
The Sotheby's Surprise
A lot purchased at Sotheby's London included a Conan Doyle letter with a questioned signature. Our spectroscopic analysis confirmed a previously unknown early manuscript hand.
“Your grandmother's autograph book.”
“That signed vinyl you inherited.”
Every collector has one. Bring it to the light.
Submit Your ItemThe Science
The truth lives
in the chemistry.
Forgers can copy the shape of a signature. They cannot copy the chemistry of the ink, the physics of the stroke, or the provenance chain that stretches back decades. Our forensic methodology examines all three — and it doesn't guess.
UV Spectroscopy
Reveals ink composition, layering order, and anachronistic materials invisible to the naked eye.
Ink Chromatography
Chemical analysis of ink binders and solvents places signatures within a narrow date window.
Pressure Mapping
High-resolution scanning captures micro-pressure variations that separate authentic hands from forgeries.
Exemplar Database
Cross-referenced against authenticated signatures from estates, archives, and certified collections.
Interactive Assessment
Test Your Collector's Eye
Five challenges. Each answer unlocks a forensic insight you didn't know. Find out if you think like an authenticator.
Submit for Authentication
Bring it to the light.
Whether it's a routine valuation, an estate deadline, or an auction urgent — we work at the speed you need.
UV Spectroscopy
Ink composition analysis under 254nm, 365nm, and white light.
Pressure Mapping
Digital imaging captures 10,000+ pressure points per signature.
Ink Chromatography
Chemical dating to within a 5-year window for most post-1900 inks.
Provenance Research
Archive cross-referencing against 400,000+ documented exemplars.
Every authentication includes a numbered certificate, methodology report, and archival-grade documentation.