Start with the certification number. Every major grading company runs a free public lookup on its own website — type in the cert number from the label and the record should come back with the same player, year, set, card number, and grade you are holding. If it returns a different card, or nothing at all, you have a problem to solve before you spend any money.
That check catches most fakes, but not all of them, and a blank result does not automatically mean fraud. Below is the full sequence: verify the number, compare the images, then inspect the holder itself.
Step one: look up the cert number
The number is printed on the label, usually below or beside the grade. Enter it on the grading company’s official verification page — go there directly rather than clicking a link in a listing, because fake lookup sites exist specifically to validate fake slabs.
Compare every field the record returns:
- Player name
- Year and set
- Card number
- Any variation or parallel designation
- The numeric grade and any qualifier
All of them have to match. A common scam is a real cert number for a cheap card printed onto a label for an expensive one. The number verifies, so a careless buyer stops checking — but the record describes a different card entirely.
Signed cards work the same way: a certified autograph carries its own number from the authenticating company, with its own lookup, and deserves the same check.
When a PSA or BGS cert number isn’t showing up
A blank lookup is alarming but has several innocent explanations. Work through them in order:
- Re-read the digits. Zeros and eights, ones and sevens, fives and sixes get misread constantly, especially from a photo. Try the obvious alternates.
- Check you are on the right company’s site. Labels from different graders look similar at a glance. A cert from one company will never appear in another company’s database.
- Consider the age of the slab. Very old certifications sometimes predate the current online database, or were migrated incompletely. Grading companies publish notes about which record ranges are searchable — check the grader’s own help pages, or simply ask their customer service whether that cert predates the online database, rather than assuming a blank result means fraud.
- Check whether the card was re-graded. When a card is crossed over, reholdered, or regraded, the old cert is retired. A retired number can return no result or a note that it has been superseded.
- Contact the grader. All of them have customer service and will confirm a cert. This is free and definitive.
Only after all of those come up empty should you treat a missing record as evidence of a fake.
Step two: compare the grader’s own image
Several graders store a scan of the card with the certification record. This is the single most powerful check available, because it defeats the harder scam: a real slab that has been cracked open, the valuable card removed, and a different card sealed back in.
Do not compare the general look. Compare specific, unrepeatable details:
- The exact position of any print dot, speck, or spot on the surface
- The precise centering — measure the border widths in the image and on your card
- Any tiny nick, whitening, or corner detail
- Wax or gum staining patterns on vintage cards
Two copies of the same card are never identical at that level of detail. If the grader’s image shows a print dot on the left shoulder and your card does not have one, the card has been swapped.
If the grader does not publish images for that cert, ask the seller for high-resolution photos of the front, back, and all four edges of the holder before buying.
Step three: inspect the holder
Genuine slabs are manufactured, not assembled by hand. That leaves physical characteristics that are hard to fake cheaply.
| Feature | Genuine | Warning sign |
|---|---|---|
| Seam | Ultrasonically welded; smooth, consistent, no gaps | Visible glue, gaps, ridges, or a seam you can pick at with a fingernail |
| Card movement | Held firmly; no rattle when shaken gently | Card shifts or rattles inside the case |
| Label print | Sharp text, correct fonts and spacing, crisp logo edges | Fuzzy or pixelated text, wrong font weight, uneven spacing |
| Security features | Layered holograms or embedded elements that shift with viewing angle | A flat printed sticker that looks the same from every angle |
| Case edges | Uniform thickness, clean molded corners | Sanded or scraped edges, mismatched halves, tool marks |
| Label position | Sits square inside the holder, consistent from slab to slab | Tilted, off-center, or trapped at a visible angle |
The best comparison tool is a slab you already trust. Hold a known-genuine slab from the same company next to the questionable one and look at them together. Differences in plastic tint, thickness, corner radius, and label placement become obvious side by side and nearly invisible in isolation.
Holder dimensions differ by company and era, which is why slab sleeves come in more than one size; a case that does not sit right in its own maker’s sleeve is worth a second look. Grading companies also change their holder and label designs periodically. A label style that does not match the era of the cert number is a real red flag — but so is assuming a design you have not seen before must be fake. Grading companies publish label history on their own sites.
The reholder scam
This is worth calling out separately because it defeats the cert check entirely. Someone buys a genuine slab of a low-value card, carefully cuts it open, removes the card, inserts a counterfeit or lower-grade card, and reseals the case.
The print and stock checks that catch fakes would settle it — but you cannot run those through a sealed holder, which is why the image comparison above carries so much weight. Those checks are set out in the guide to separating reprints and counterfeits from real cards, and they apply to a swapped card as much as a loose one.
Defenses:
- Compare against the grader’s stored image, as above. This is the reliable one.
- Examine the seam under magnification and angled light. Resealing almost always leaves evidence — a slightly different plastic texture, a faint line, adhesive residue.
- Weigh it. A genuine slab from a given company and era has a consistent weight. A resealed one is often off by a noticeable margin. This only works if you have a known-genuine slab of the same type to weigh against and a scale accurate to a tenth of a gram.
- Look at how the card sits. Factory encapsulation positions the card consistently. A hand-resealed card often sits slightly rotated or off-center compared to other slabs from the same company.
Buying behavior that keeps you out of trouble
Most fake-slab losses trace back to how the purchase was made, not to a failure of inspection.
- Verify the cert before paying, not after. Ask for a photo of the label if the listing does not show one clearly.
- Be skeptical of a price well below what the card has recently sold for in that grade. Search the exact card, year, set and grade on eBay, filter to Sold Items, and read the last handful of completed sales. Nobody sells a genuine high-grade card at a steep discount by accident.
- Use payment methods with buyer protection. Avoid friends-and-family transfers, wire transfers, and payment apps with no dispute process, regardless of how the seller frames it.
- Prefer sellers with a long track record in the category. A brand-new account listing several expensive slabs at once deserves extra scrutiny.
- Keep the packaging and photograph the slab on arrival, before you handle it. That record matters if you need to file a claim.
If you already own a slab you think is fake
Do not crack it open. An intact fake is evidence; a cracked one is a loose card with no provenance.
Photograph the label, the cert lookup result, the full front and back, and the seam. Contact the seller first — some fakes move through honest sellers who bought them the same way you did. If that goes nowhere, open a dispute with the marketplace or payment provider inside their claim window, which is often shorter than people expect. Grading companies also accept reports of counterfeit holders and can confirm in writing that a cert does not belong to the card.
Common questions
My PSA cert number isn’t showing up. Is the slab fake?
Not necessarily. Re-read the digits, confirm you are on the correct grading company’s site, and consider that very old certs may not be in the searchable database. Contact the grader directly to confirm before concluding anything — they will check it for you.
Is this a fake slab? The label looks slightly different from others I have seen.
Label designs change over time, so a difference alone is not proof. Compare against the grading company’s published label history for the era matching the cert number, and check the physical characteristics — seam, rattle, hologram depth — which are much harder to fake than a printed label.
Can a real card be in a fake slab?
Yes, and it happens. Someone encases a genuine but ungraded card in a counterfeit holder with an inflated grade. The card is real; the grade is fiction. That is why you verify the cert and compare the grader’s stored image rather than only judging the card.
Are cheaper grading companies more likely to be faked?
Fakes follow money, so the most counterfeited holders are the ones whose grades add the most value. That said, any holder can be faked, and the verification steps are the same for all of them: look up the cert, compare images, inspect the case. If you are choosing where to send your own cards, how the major graders differ matters more than counterfeit risk.
