Trading card fraud on marketplaces in 2026 comes in seven forms: counterfeit raw cards, fake graded slabs, real cert numbers on fake cases, altered cards resubmitted for a higher grade, resealed or pre-order product that never ships, account takeover of trusted sellers, and banned sellers returning under new identities. PSA intercepted more than $200 million of fakes in 2025, up 45.3 percent, and the card market spent $450 million in January 2026 alone. The common thread is that every scam depends on a seller the marketplace never verified.

This guide is for marketplace operators, trust and safety teams, and anyone building a platform where collectors trade with each other. It covers what each scam looks like on a listing, what it costs, and the control that stops it. The sources are linked so you can check them.

How big is trading card fraud in 2026?

Bigger than the hobby press had been reporting, and now measured. PSA's first fraud report, published in May 2026, says the grader intercepted more than $200 million of counterfeit and altered collectibles in 2025, a 45.3 percent increase year over year. Pokemon accounted for 56.3 percent of counterfeits and sports cards for 43.1 percent. Fake Pokemon submissions alone rose 125 percent. Card alteration, meaning trimming, rebacking and resurfacing real cards to pass as higher grade, rose 108.7 percent.

PSA president Ryan Hoge told Sports Collectors Digest the intercepted total is the floor, and the real figure is well north of a billion dollars. The report also identifies where the fraud is moving: the $100 to $300 price band, where buyers do not pay for authentication and sellers do not expect scrutiny.

The demand side explains the supply. CNN Business reported that buyers spent $450 million on cards in January 2026 and that values rose 145 percent over the prior year. In the first quarter of 2026 more than $500,000 of cards were stolen in robberies across the US, Canada and the UK, and stolen cards get sold in the same place fake ones do: online, by sellers using someone else's name. In September 2026, InvestigateTV+ took the story to local news across the United States. The full numbers live on the trading card fraud statistics page.

Scam 1: counterfeit raw cards

What it looks like: an ungraded modern chase card priced 10 to 30 percent under market with clean photos. Modern counterfeits from the last two years pass the old tests: correct card stock, correct holo pattern, correct font.

What it costs: the buyer loses the purchase, the marketplace eats the chargeback and the dispute cost, and the seller relists under a fresh account.

The control: photo-based authenticity screening at listing time, not after a complaint. A check that reads print pattern, layer alignment, color profile and edge geometry against a reference set flags the listing before it goes live. Pair it with seller identity verification so a flagged seller cannot simply open a new account. deepidv's TCG Authenticity Verification runs both checks in a single call.

Scam 2: fake graded slabs

What it looks like: a PSA 10, BGS 9.5 or CGC 10 in a holder that looks right at listing-photo resolution. The label font is close, the flip is close, the QR code scans to a real page.

Why it works: the holder is doing the trust work. A buyer who would inspect a raw card will not inspect a slab, because the slab's whole purpose is that they do not have to.

The control: treat the slab as a claim to be verified, not a verdict. Cross-check the cert number against the grader's database, confirm the card image on record matches the card in the listing, and confirm the label data matches the record. If the marketplace cannot confirm all three, the listing gets a "cert not confirmed" badge, not a "graded" badge.

Scam 3: real cert numbers on fake cases

What it looks like: the cert number is real. It scans. It belongs to a PSA 10 of the same card. The card in the holder is a counterfeit or a lower-grade copy, and the real slab is somewhere else.

Why it matters: this defeats the "just scan the QR" advice that every buyer guide gives.

The control: image match, not number match. The grader's record includes a photo. Comparing the listing photo to the record photo at the pixel level tells you if the card in the holder is the card that was graded. A marketplace that does this at listing time makes cert cloning pointless.

Scam 4: altered cards resubmitted for a higher grade

What it looks like: a real vintage card that has been trimmed, rebacked, cleaned or recolored, then graded and sold at the higher grade's price. PSA reported alteration fraud up 108.7 percent in 2025.

Why marketplaces carry the risk: the grader may catch it or may not. When it slips through and the buyer later discovers it, the dispute lands on the platform, not the grader.

The control: grade estimation as a second opinion. An independent estimate of centering, corners, edges and surface from the listing photos, compared against the label grade, flags listings where the two disagree by more than a grade point. Those get manual review before the sale, not after.

Scam 5: resealed boxes and pre-orders that never ship

What it looks like: sealed booster boxes with replaced shrink wrap and the chase packs removed, or "pre-order" listings for allocation that does not exist. The Thai case reported by Khaosod English in August 2026 is the template: small legitimate deliveries to build trust, then large pre-order deposits by direct bank transfer, then excuses about customs, then silence.

The tell: payment moving off-platform. Every large-loss pre-order scam in 2026 involved a seller steering the buyer to a personal social account and a bank transfer.

The control: verified seller identity tied to a verified payout account, and a policy that unverified sellers cannot list pre-orders or sealed product above a value threshold. When the seller's legal identity is on file and the payout account is theirs, disappearing stops being free.

Scam 6: account takeover of trusted sellers

What it looks like: a five-year-old seller account with thousands of positive reviews suddenly lists twenty high-value slabs at 20 percent under market, all shipping from a new address. The real seller's credentials were phished or bought.

Why it is growing: as marketplaces tighten new-seller onboarding, established accounts become the asset worth stealing.

The control: step-up verification on risk signals. A new payout account, a new shipping origin, a listing pattern that breaks from history, or a login from a new device on a high-value account should trigger a liveness check against the face on file. It takes the real seller ten seconds. It stops the thief cold.

Scam 7: banned sellers returning under new identities

What it looks like: you ban the seller. They are back the next day with a new email, a new phone number, a new name, and the same inventory. The Singapore Police arrested one serial Pokemon e-commerce scammer in February 2026 after a series of scams, plural.

Why email and phone bans fail: both are free and infinite.

The control: one-to-many biometric deduplication at signup. A face compared against every previously banned face, with the result returned in under a second, means one ban is one ban.

What is the minimum a card marketplace should verify in 2026?

Three things, in this order.

1. The seller. Government ID plus liveness at onboarding, biometric dedupe against your ban list, and a verified payout account in the seller's own name. In the US this is also what the INFORM Consumers Act requires for any seller over 200 transactions and $5,000 a year, and the FTC's first case cost Temu $2 million.
2. The card. Photo-based authenticity screening on every listing above a value threshold, with a grade estimate compared to any label grade.
3. The slab. Cert number confirmed against the grader's record, and the record image matched to the listing image.

Everything else, seller ratings, escrow, buyer protection, works better once those three are real.

How does deepidv fit?

deepidv is a verification engine and agentic compliance suite. For card and collectibles marketplaces it runs seller identity verification, one-to-many dedupe, and TCG Authenticity Verification behind one API, with every check sealed as a tamper-evident proof at proof.deepidv.com that contains zero personal data. Marketplaces keep their existing payments and dispute stack and add verification where it is missing. The marketplace solution overview is at deepidv.com/marketplaces, and pricing is at deepidv.com/pricing.

Suggested read: How to start a TCG marketplace that buyers trust

Frequently asked questions

How do I know if a PSA slab is fake?

Scan the cert, then compare the card in the holder to the image in PSA's record, not just the label data. Fake holders with real cert numbers pass a scan. They do not pass an image match. Check the label font, the flip alignment and the holder seam against a known-good example, and be suspicious of any slab priced well under recent comps.

Are fake Pokemon cards a bigger problem than fake sports cards?

By volume, yes. PSA's 2025 report attributes 56.3 percent of intercepted counterfeits to Pokemon and 43.1 percent to sports cards, and fake Pokemon submissions rose 125 percent year over year.

What is the INFORM Consumers Act and does it apply to card marketplaces?

It is a US federal law, in force since June 2023, that requires online marketplaces to collect and verify identity, bank and tax information from high-volume third-party sellers (200 or more transactions and $5,000 or more in revenue over 12 months). It applies to any marketplace with third-party sellers, including card and collectibles platforms. The FTC's first enforcement case, against Temu in September 2025, carried a $2 million penalty.

Can a marketplace verify a card from photos alone?

For screening, yes. Print pattern, layer alignment, color profile, edge geometry and centering can all be assessed from listing photos to flag likely counterfeits and estimate grade. Physical inspection remains the final word for high-value items, which is why photo screening should gate which listings get physical review.

What is one-to-many biometric deduplication?

Comparing a new user's face against every face already enrolled or banned, returning any matches. It is how a marketplace makes a ban stick when the banned seller returns with a new email and phone number.

Does seller verification hurt conversion?

Verified sellers convert better, not worse, because buyers pay more for trust. The friction belongs at onboarding, once, not at every sale. A full identity check with liveness takes most sellers under a minute.