How to Tell If a Sports Autograph Is Real

Somebody hands you a signed football, or you're staring at a listing with a great price, and the only question that matters is the one nobody can answer for sure from a photo: is it real?

Here's how we'd work through it. Start with the paperwork, because that's the fastest check. Then look at the signature the way an authenticator does. Then know the machine-made fakes that fool most people. And know when to stop guessing and send it to a pro.

Step one: check the paperwork before you check the signature

If the item comes with a certificate of authenticity from PSA/DNA, JSA, Beckett or Fanatics, you can settle most of this in ten seconds. Find the serial number on the hologram or the cert card and look it up on the authenticator's own site: PSA, JSA, Beckett or Fanatics. The record should describe the item you're holding. Right athlete, right item, right inscription if it has one.

Three things to watch:

• The number has to be in the database. A hologram with a number that returns nothing is a fake hologram.
• The record has to match. A real cert for a signed 8x10 stuck on a signed helmet is a real cert on the wrong item.
• The issuer has to be somebody you've heard of. A certificate from the seller, or from an "authentication company" with no searchable database, is a piece of paper. Our post on what a COA actually guarantees goes deeper on this.

If the paperwork checks out from one of the big four, you're done. If there's no paperwork, or the paperwork is from somebody you can't verify, keep reading.

Step two: look at how the signature was made

Authenticators call it letter formation and flow. Here's the plain version.

Real signatures are fast. An athlete has signed their name tens of thousands of times. The pen moves without thinking, so the line is smooth and confident, with a looseness a careful hand never gets. A forger is drawing a picture of a signature, and drawing is slow. Look for shaky lines, wobbles in what should be a straight stroke, and pen lifts in the middle of a letter where the real thing would be one motion.

Real signatures have pressure. When you sign fast, the pen presses harder on some strokes and lifts off on others. The line gets thick and thin. Traced or copied signatures tend to have the same line weight all the way through because the forger is going slow and steady.

Real signatures start and stop clean. A pen that lands and takes off at speed leaves a tapered start and a tapered finish. A pen that's placed carefully leaves a little blob at the start and the end.

Real signatures vary. No two are identical. If you're comparing an autograph to an exemplar (a known-real example) and it matches stroke for stroke, that's a bad sign, not a good one. It's probably traced.

Where do you get exemplars? The authenticators' own sites, auction house archives, and photos of the athlete signing at a public event. Compare the overall shape, the slant, the way specific letters connect, and how the signature has changed over the years. A player's rookie signature and their Hall of Fame signature usually look different, so make sure you're comparing against the right era.

Step three: know the machine-made fakes

Most fakes you'll run into weren't drawn by a forger at all. They were manufactured, and each kind leaves a tell.

Autopen. A machine that holds a real pen and traces a stored signature. Politicians and celebrities have used them for decades and some athletes have too. Tells: the line weight is perfectly even the whole way through, there's a tiny dot or hook where the pen lands and lifts, and every autopen signature from the same template is identical. If you find two "signed" items with signatures that overlay perfectly, it's a machine.

Preprint. The signature is printed onto the photo along with the image. Tells: it has no texture. Tilt the item under a light and a real ink signature sits on top of the surface and catches the light differently than the printing. A preprint is flat and in the same plane as the picture. Run a fingertip over it. Real Sharpie on a glossy photo has a faint ridge.

Stamps and secretarial signatures. Old team-signed balls are famous for this. A clubhouse attendant signs for half the roster, or a rubber stamp does. Tells: the same handwriting across a dozen different "players," or a signature that's crisp and identical in a spot where a hand-signed ball would show variation.

Step four: check the item and the ink

The signature has to make sense on the thing it's on.

• Period-correct pen. Sharpies didn't exist before 1964. A 1950s star signing a 1950s photo in fresh, bold black Sharpie is a problem.
• Right pen for the surface. Athletes at real signings use whatever the organizer hands them, and organizers know what works: a Sharpie on photos and cards, a paint pen on helmets and bats, a ballpoint on baseballs. A helmet signed in a ballpoint that barely shows is odd. Our guide to pens for autographs covers what's normal on each surface.
• Ink that fits the age. Ink sinks into paper and fades over decades. Bright, fresh ink on a yellowed 40-year-old program is worth a second look.
• Official item. Most legitimate signed baseballs are official league balls, not generic ones. Not a rule, but generic balls with big-name signatures show up in fake lots a lot.

Step five: look at the seller

Half of spotting a fake is spotting the person selling it.

• A price way under market for that athlete. There's a floor for a real Mahomes, and a "signed" jersey at a fifth of it is priced like a fake because it's one.
• Proof photos that don't hold up. A photo of the athlete signing something isn't proof they signed this. Reverse image search it. Forgers borrow signing photos from the internet.
• The same handwriting across different athletes in the seller's inventory, or the same pen and ink on everything.
• A COA the seller printed themselves.
• Vague answers about who authenticated it. A legitimate dealer will tell you exactly who and how to verify it. If they can't, that's the answer.
• A seller in your DMs using a real dealer's name and photos. Scammers copy legitimate shops on social media, including ours, and sell fakes through messages. Buy from the actual website. If you've ever wondered whether Ultimate Autographs is legit, that page has the straight answer and the receipts.

We wrote a whole post on what goes wrong when you buy uncertified autographs, if you want the horror stories.

What you can't do at home, and where to send it

Everything above will help you catch the bad fakes. It won't catch the good ones. Professional authenticators have exemplar files with thousands of examples of each athlete's signature across their whole career, and they've seen the forgers' work before. You haven't.

So if you've got a piece with no certification and it matters to you, either because of what you paid or what it's worth, send it in. PSA/DNA, JSA and Beckett all take submissions by mail through their websites, and all three set up at the big card shows so you can get an item looked at in person while you wait. Fees start around $25 to $35 for a common signature and climb with the athlete. You'll get a pass or a fail, and if it passes, you'll get the hologram and the database record that makes the piece sellable.

One thing we get asked: no, we can't authenticate your item. We're a dealer, not an authenticator. Every piece we sell is certified by one of the four companies above, and we'd point you to them for anything you already own.

Or skip the guessing

The reason witnessed authentication exists is so nobody has to squint at pen strokes. When a JSA or Beckett rep is standing at the table watching the athlete sign and puts the hologram on right then, there's no judgment call to make. That's how the items in our marketplace, our mystery boxes and our live breaks are certified, and you can look any of them up. If you want the full picture of how that works, our authentication page covers the four companies, what a cert does and doesn't promise, and how we handle it.