Counterfeiters long ago stopped just faking coins. They fake the plastic, the label, the hologram, and the barcode — because a slab's whole job is to let you relax, and relaxed buyers don't look closely. The good news: fake slabs fail simple checks that take under five minutes. Run all seven before money moves.
Check 1 — Look up the cert number. Always.
Every legitimate service runs free online verification: PCGS Cert Verification, NGC Certification Lookup, and equivalents at ANACS, ICG, and CACG. Enter the number from the label. The service's record must match the holder on every field: date, denomination, mintmark, variety, grade, and — where the service provides them — the photos. Full walkthrough in our cert-check guide.
The cloned-cert trick
Sophisticated fakes copy a real cert number from a real coin — so the lookup "passes." That's why photo matching matters: if the service shows images, compare toning patterns, marks, and strike detail against the listing photos. Toning is a fingerprint; two coins never match. A "passing" number attached to a different-looking coin is a fake, full stop.
Check 2 — Population sanity
Does the coin make sense? A rare date in high grade appearing from a zero-feedback seller at half of catalog value is not a lottery win, it's bait. Check the population report while you're on the service's site: if the pop is tiny and examples trade through major auction houses, it will not surface randomly on a Tuesday for 40% of market.
Check 3 — The holder itself
- Seams and welds: genuine holders are sonically sealed with clean, even seams. Glue residue, wavy joints, or a pried-look edge are red flags.
- Label printing: real labels are crisply printed — sharp microtext, correct fonts, straight alignment. Blurry text, off fonts, or a crooked label are classic tells.
- Security features: modern PCGS and NGC holders carry holograms and anti-counterfeiting features (PCGS added NFC chips readable by phone on recent holders). An allegedly recent holder missing its era's features fails.
Check 4 — Generation consistency
Both services' holder designs evolved through known generations. A coin supposedly graded recently shouldn't be in a 1990s-style holder, and vice versa. You don't need to memorize every generation — both companies publish holder histories; two minutes of comparison catches mismatches.
Check 5 — The coin's look vs. the grade
An "MS65" with visible hairlines, flat luster, or scattered heavy marks in the photos is wrong twice: either the holder is fake or the photos aren't of the actual coin. Both mean walk away.
Check 6 — Seller forensics
- Feedback history on coins, not just volume. Hundreds of positives selling phone cases tells you nothing about numismatic legitimacy.
- Stock photos, refusal to add photos, or photos that don't show the full holder including the cert number are all disqualifying.
- Ship-from location inconsistent with the listing story.
Check 7 — The price test
Pull sold listings for the same coin and grade. A deal 30–50% under consistent sold prices from an unknown seller is not a market inefficiency; certified coins are too well-tracked for that. Someone always knows what a slabbed coin is worth — if you're offered dramatically less, the person offering knows something you don't.
Practice on live inventory (verify before you ever bid)
As an eBay Partner, I may be compensated if you make a purchase.
→Live: PCGS graded coins — check certs as practice →Live: NGC graded coins — check certs as practice →Sold: recent certified coin prices for the price testEvery listing above should pass all seven checks before a single bid. The five minutes is the cheapest insurance in the hobby.
None of these checks requires expertise — only the discipline to run them every time, especially when the deal looks good. Counterfeits are engineered for exactly the moment you decide checking would be paranoid.