Autograph authentication · field guide
Before you buy, sell, or authenticate a signed item, learn the 12 checks that can expose many fake, printed, copied, traced, secretarial, and mechanically reproduced autographs.
Free to read, and written to be used with the item in front of you. This site is educational — no page here issues an opinion of authenticity.
A signature is a motor habit, not a picture. Once you know what a habit looks like on paper, a copy of one is loud.
The whole method
Autograph authentication is not based on one characteristic. Experienced authenticators examine the signature, writing instrument, surface, provenance, signing habits, known exemplars, and other evidence together.
Before anything else
These five resolve a great many items in a few minutes, with nothing but good light and a magnifier. Each one links through to the check in the guide that treats it properly.
Printed, reproduced, facsimile, autopen, and mechanically applied signatures can all look handwritten in a photograph. Ink laid down by a moving hand sits in the surface, varies in width, and catches the light unevenly. A printed signature is part of the image itself — flat, even, and made of the same dots as everything else on the page. Look at it in raking light and under magnification before you believe your eyes.
Check 04 — speed and flow →The pen, marker, paper, photographic stock, and the item itself all have to be plausible for the day the autograph was supposedly signed. Ballpoints reached American shops in October 1945; the Sharpie fine point launched in 1964; glossy resin-coated photographic paper is largely a 1970s-and-later product. A 1930s studio portrait signed in felt tip is settled before you look at a single stroke.
Check 09 — ink and paper age →Where an autograph came from matters, and a vague story is not the same thing as documented provenance. A signing date, a witness, a ticket stub, a dated letter, an estate inventory, or a proof photograph of the signing are all things somebody else can check. “From a private collection” and “my uncle worked in the industry” are not — they cannot be confirmed or refuted by anyone.
Check 11 — provenance →Genuine signatures vary. The same person signing twice in one minute produces two different objects — different spacing, different pressure, a different tail on the last letter. Signatures that are identical to one another, or unusually neat and mechanical, deserve additional examination rather than confidence. Sameness is the signature of a machine or a template, not a hand.
Check 07 — slant and proportion →A Certificate of Authenticity does not make an autograph genuine — it records somebody’s opinion, and anyone with a printer can produce one. Wherever possible, verify the certificate number through the issuing company, using contact details you found yourself rather than the ones printed on the certificate.
Check 12 — certificates →Then work the full list, in order.
Twelve checks, from the physics of the writing through to the paperwork. Any single clear failure is grounds to stop.
See all 12 autograph checksImportant
A certificate is only as credible as the person or company issuing it. Forged and meaningless certificates exist. Check the authentication company, look for a verifiable certification number, research the authenticator’s experience, and evaluate the autograph itself.
The checklist
What you are actually looking at
Not all of these were made to deceive. Several were produced openly and only become a problem when sold as hand-signed — which is why the seller’s description matters as much as the item.
The signature was printed onto the item at the factory, along with the picture. Publicity photographs, album inserts, and fan-club mailers were produced this way by the thousand, and the signature usually sits under the surface gloss rather than on top of it.
A machine holds a real pen and traces a fixed template, so the result is real ink on real paper. Because the template never changes, autopen signatures are dimensionally identical to each other, carry no pressure variation, and stop dead at both ends.
A rubber or self-inking stamp of the signature, pressed onto the item. Stamps leave a flat, even deposit of ink, sometimes with a faint square outline or a blotted, spread edge where the rubber pushed ink outwards.
A real person — an assistant, studio employee, or family member — signed on the celebrity’s behalf, often with their permission. These pass every physics-based check because a hand really wrote them, and they are caught only by comparison against known genuine examples.
A genuine signature was copied stroke by stroke, usually over a lightbox or through the paper. Tracing is slow, so the line has an even width, no pressure story, blunt starts and stops, and often a fine regular wobble along the long curves.
Somebody practised the signature and wrote it freehand. Good forgers get the silhouette right and the construction wrong — the wrong loop closes first, a stroke crosses on the wrong side, or the pen was lifted and put back to repair a shape.
A scan of a genuine autograph, printed onto a new item with a modern printer. Under a loupe the line breaks into a regular dot pattern or shows a soft inkjet halo, and the “ink” never indents the surface at all.
Real vs fake
Two plates to try here. Guess real or guess fake, and the card shows the verdict, what an examiner read to reach it, and the percentage of people who called it correctly — then open the full set.
Call it
One call per plate. The verdict, the reading, and how many people got it right follow your answer.
Call it
One call per plate. The verdict, the reading, and how many people got it right follow your answer.
12 plates filed, 7 more signers queued
The full set runs through Disney, Taylor Swift, and the names coming next — Michael Jackson, Cristiano Ronaldo, Freddie Mercury, The Beatles, and more.
Before you pay
None of these proves a fake on its own. Two or three together are a reason to walk away, and every one of them is something you can check before money moves.
Check 11 — provenanceEvery tell worth seeing lives in a close-up. A seller who will not send one is protecting the sale, not the item.
The reverse carries stamps, labels, dealer marks, and the evidence of a modern reprint. It is the cheapest photograph to take and the most revealing.
An unverifiable certificate is the same as no certificate. Check the serial with the issuer, using contact details you found independently.
Scarce signatures do not arrive in bulk. A seller with a dozen of something that rarely surfaces has a source worth explaining.
Real signing varies. Uniformity across a batch points to a template, a stamp, a machine, or one very busy hand.
A history that exists solely in the listing text cannot be confirmed, and it disappears the moment you try to resell the item.
Ask what the seller knows that the market does not. A genuine signed item priced far under comparable sales is usually priced correctly for what it is.
Urgency exists to prevent examination. Nothing genuine loses value because you took a day to check it.
Honest sellers answer provenance questions plainly, and say so when they do not know. Deflection is information.
After the twelve
A clean run through the twelve tests is not a verdict. What it does is tell you whether the item is worth sending to a professional — and what to put in front of them when you get there. A secretarial signature, an autopen, and the work of a skilled forger can all pass every test on this page, because in each case a real hand or a real machine put real ink on the surface at speed.
So treat the result as a triage decision rather than a conclusion. Keep three lists — what passed, what failed, and what you could not judge — and hand all three to someone with an exemplar library. A clear failure early on saves you the fee; a clean pass is the point at which paying for an opinion starts to make sense.
Selling
An attic find, an inherited album, a box from an estate sale — if you would rather move an item on than keep it, Piece of the Past has a page for sellers setting out what it buys and what it takes on consignment. Settle the authentication question first. What you can document about a signature is what sets its price, and an unexamined autograph sells for what an unexamined autograph is worth.
Common questions
Still not sure?
Some autographs cannot be judged responsibly from a checklist alone. Valuable, historic, unusual, or questionable signatures should be examined by someone with substantial hands-on experience.
Ask Samuel Kevin Martin
Samuel Kevin Martin has worked professionally with autographs for more than four decades and has served as a court-certified autograph expert. He is the founder of Piece of the Past, Inc. and has written extensively about autograph authentication, collecting, forgery, and memorabilia.
Credentials as published by Piece of the Past. Samuel Kevin Martin is authentication lead, piece of the past; confirm current services and terms with the company directly.
Contact
Send a short description of the item and clear photographs — the signature square-on and close, the whole object, and the reverse. Say what you know about where it came from, and which checks you could not judge. That last part is useful information, not a weakness.
autographexpert01@gmail.comEducational information on this site is intended to help collectors identify warning signs and make better-informed decisions. Determining authenticity can require examination by an experienced professional.