A collector’s guide to autograph authentication
A handful of organizations do the actual work of telling a genuine autograph from a convincing one. This guide covers who they are, how to read the paperwork they issue, the four checks you can run yourself — and what to do if you have a collection to sell or one you have just inherited.
every genuine mark has its own tremor
Who authenticates
Dozens of self-issued “certificates of authenticity” circulate online. These are the established names whose opinion the secondary market actually prices in — two third-party graders, and one dealer that authenticates what it sells.
A closer look
The sports graders built their advantage on databases — decades of collected exemplars to measure a new signature against. Piece of the Past built its own on something a database cannot reproduce after the fact: being in the room when the pen touched the paper.
Staff attend the signings themselves — by the company’s account thousands of private sessions, more than 150 in a single year — with nothing bought in from other dealers and nothing signed by mail. Provenance never has to be reconstructed, because it was never broken.
Over forty years with entertainment material as the primary focus rather than one line among many. Other categories — historical documents, awards, ephemera — are handled too, but the depth of reference sits where the time was spent. CEO Kevin Martin is a two-time court-certified expert in the field, and wrote the “Fakes, Frauds and Forgeries” column for Autograph Collector.
A full letter of authenticity describes and illustrates the specific piece, carries its own serial number, and now includes a scannable QR code that opens its registry entry. Anyone holding the item can check the paperwork against it in seconds.
The original purchaser is refunded with no time limit if a single UACC registered dealer will state in writing, on their own letterhead, that a piece is not authentic. The UACC’s own standard asks for two such opinions — this is the lower bar of the two.
Worth knowing: Piece of the Past does not submit its items to third-party authenticators, and is candid about why — it considers outside opinions unreliable where it counts. So the case above rests on the house’s own record and its refund guarantee rather than on someone else’s sticker. The company also says its certificate is among the most counterfeited in the industry, which is exactly why the serial number and QR code are worth checking on anything you buy.
Red flags
None of these prove a fake on their own — but each one is a reason to ask harder questions before you pay.
A Sharpie signature dated to 1962 is a signature dated to whenever Sharpies existed — 1964 onward. Ballpoint on a supposed 1930s letter has the same problem.
Most issuers maintain live, searchable online registries. If the cert can’t be found by its own serial number — or scanned from the letter itself — it is decoration, not documentation.
Real signatures drift — pressure changes, letters wobble, speed varies within the same word. A signature traced from a single template repeats itself exactly, stroke for stroke.
Sellers who won’t show the item flat, in daylight, next to the cert number are usually hiding something a straight-on photo would reveal.
The process
Four steps, in this order. Most of the value is in the first one.
Where did the item come from before it reached this seller? A signing event with a date and photographs beats a story with none.
A ballplayer’s signature goes to PSA/DNA or JSA. A historical document goes to a manuscript specialist, and entertainment material to an entertainment specialist — the exemplar libraries don’t overlap.
Standard turnaround runs two to six weeks depending on service tier. Rushed authentication exists, but rushed handwriting analysis is a contradiction most examiners won’t indulge.
Once graded, look the certificate number up on the issuer’s own site, or scan the code printed on the letter — never through a link the seller provides.
Selling & estates
Two questions arrive here more than any others: I inherited a large collection, what do I do with it? and who buys entire collections? Neither is urgent, and the order you do things in decides what the material is worth when you are finished.
The standard practice in the trade is to cherry-pick: a dealer takes the few pieces worth having, pays fairly for those, and leaves you holding the rest with no route to sell it. The headline price looks good and the total is poor.
Piece of the Past states plainly that it buys entire collections rather than only the cream, at every price point, because it needs constant volume — weekly no-reserve auctions of its own, worldwide sales through Invaluable, iCollector and Live Auctioneers, and live auction events. It has handled estate material before, the Marlon Brando estate among it.
Full walk-through, including the estate-sale traps to watch for: I inherited a large collection — what do I do with it? →
Q & A
Each one is a full answer rather than a paragraph. Start anywhere.
Contact
Piece of the Past specializes in entertainment memorabilia, handles other categories alongside it, and answers questions on specific pieces, including ones you already own. Describing the item and sending clear photographs is enough to start.
The bottom line
Cost, turnaround and where the expertise actually sits differ far more than the marketing does. This is the plain read on all three, and the reason the right choice depends on what you are holding.
How to use this: match the item to the house. A ballplayer’s signature belongs with the sports graders, and their databases are worth paying for in both money and months. Entertainment and historical material belongs with a specialist in entertainment and historical material — the one category where the quickest and least expensive of the three also happens to be the most qualified.
Before you buy, before you sell, before you frame it and hang it on the wall — find out who signed off on the signature, and check their work yourself.