How to Spot a Fake Graded Slab (PSA, BGS, SGC)

This is a different risk than a fake card

Spotting a fake or reprint card is about the cardboard itself — print quality, stock, colors. A fake or tampered slab is a different problem: the card inside can be completely genuine, but the case around it is either an outright counterfeit holder, a real holder that was cracked open and reglued around a lower-grade or swapped card, or a label that doesn't actually match what's inside. Buyers pay a premium specifically because the grading company's holder and cert number are supposed to guarantee condition and authenticity — that premium is exactly what makes the slab worth faking.

Always verify the cert number independently

Look up the number on the grader's own site — not a link the seller sends you. PSA, BGS, and SGC all have free public cert/serial lookup tools. Type the number in yourself.
Match every detail, not just the grade— player, year, set, card number, and variation/parallel on the lookup result all have to match the physical label in front of you. A mismatched year or missing parallel name is the single most common tell of a swapped label.
Check the photo if the grader provides one — PSA's cert lookup shows a reference image for many cards. Compare centering and any print flaws against what you can see through the holder.
A cert number that doesn't exist, or returns a different card, ends the transaction— no legitimate explanation makes that okay.

What to check on the physical holder

Seams and glue lines— genuine holders are ultrasonically sealed with a clean, even seam. Visible glue residue, an uneven or wavy seam, or a case that looks like two halves were snapped back together are signs of a crack-and-reseal.
Label print quality— blurry text, wrong font, inconsistent spacing, or a barcode that looks low-resolution compared to a known-genuine label from the same era are red flags. Grading companies have changed label design over the years; compare against the correct era's label style, not just any example.
Holographic/security features— PSA and BGS both use tamper-evident security elements on current-era labels (holographic PSA logo, BGS hologram strip). Missing or visibly reproduced versions of these are a warning sign, though older slabs predate some current features — check the cert lookup for what's expected on that era's holder.
Case weight and plastic quality— counterfeit holders are often made from thinner or lighter-feeling plastic than the real thing. Hard to describe, easy to notice once you've handled a genuine slab of the same type side by side.
Rattling or shifted card— a card that audibly moves inside the holder, or sits visibly off-center in the case itself (not the card's print centering), suggests the holder was opened and isn't sealed the way it left the grading company.

Where this scam shows up most

Fake and resealed slabs concentrate wherever a buyer can't handle the item before paying: marketplace listings with only a few low-resolution photos, in-person show tables where the seller rushes the interaction, and private sales outside a platform's buyer protection. High-value modern rookies and vintage cards in high grades are targeted most, since that's where the gap between a real PSA 10 and a common raw card is largest. See How to Avoid Sports Card Buying Scams for the broader pattern.

Before you pay a graded-card premium

Run the cert lookup before you commit to buy, ask for high-resolution photos of the label straight-on and the seams at an angle, and be willing to walk away from any seller who won't provide either. If a deal only makes sense assuming the slab is genuine, verifying it isn't optional. For reading exactly what a label is telling you once you've confirmed it's real, see How to Read a Graded Card Label.