Ask a serious buyer of graded cards what worries them and the answer is rarely the grade. It is whether the item inside the holder is what the label claims. Counterfeit singles, resealed wax and faked holders carrying transcribed certification numbers have all surfaced, and every jump in prices makes that work more attractive. Which is why NFC authentication is now a real agenda item for the collectables trade.
The problem is structural. Every visual security feature the hobby leans on, holograms, UV marks, microprinting, label patterns, is ultimately a printing problem, and printing problems get solved by anyone with volume and patience. Worse, the trust chain ends at a printed certification number that anyone can copy off a genuine slab onto a fake one. The database then confirms the number, not the object.
The UK tag supplier Seritag set out the case in a piece published on 10 August 2026, arguing that the collectables market has arguably never been bigger and that the market for fraudulent collectables has peaked alongside it. Its position is straightforward: a tap should do the job that paperwork and certificates do badly.
What NFC actually is, in the right terms
NFC is high frequency RFID at 13.56 MHz, the same technology behind contactless payments and hotel key cards. Most tags used for product authentication sit on ISO/IEC 14443 Type A and present to a phone as an NFC Forum Type 2 tag, the familiar NTAG21x family, or a Type 4 tag for the more capable devices. The tag holds an NDEF message, usually a URL, and the phone opens it on tap. This is not UHF RAIN RFID at 860 to 960 MHz, which is built for reading pallets at range. The appeal here is that the verifying reader is already in the customer’s pocket.
A UID is not authentication
This is where well meaning projects fall over. A tag serving a static URL with a serial number in it is a convenience feature, not a security control. The NDEF content copies to a blank tag in seconds with a free app, and the UID can be emulated on programmable hardware. If your page says genuine because it recognised a number, you have built an expensive QR code.
Real trading card authentication requires the tag to prove possession of a secret it never reveals, which means a chip with a cryptographic core. NXP’s NTAG 424 DNA is the reference point, using AES-128 and its Secure Unique NFC feature: every tap appends a freshly encrypted identifier, a read counter and a message authentication code to the URL, so a captured link replayed later fails on the counter. The IC is certified to Common Criteria EAL4.
Seritag lands in the same place, pointing buyers at the NTAG424 and its AES-128 encryption specifically because the chip issues a fresh unique code on every scan for a third party server to verify. That is the distinction it draws against printed serial numbers and QR codes, which can be photographed and reprinted without any special equipment.
There is a proof point in the wild. PCGS embedded HID Trusted Tag Services inlays in its coin and banknote holders from 2020, so a tap serves a one time URL carrying a cryptographic one time password, validated in the cloud before the certification record appears. Card grading has been slower: PSA, which dominates that market, has announced no NFC holder programme.
What a deployment actually involves
Seritag breaks the process into three steps, and they are worth stating plainly because a lot of projects skip the middle one. The item is tagged, whether the chip goes into the object itself, its packaging, a display case or a grading slab. The item’s details, product information, serial number, issue date and ownership records, are then registered against that chip in an authentication platform. Only then does the collector tap and get an answer.
The placement options matter more than they sound. Seritag notes that authentication tags can be embedded into garments, sealed into a slab or built into a case, and its own range for this runs from labels and disc tags through to garment specific formats. The applications it lists are broad: sports trading cards, TCG singles, signed football shirts, match worn memorabilia, limited editions, comic books, collector’s editions of games, autographed merchandise and higher value artwork. The company sells the software side too, a tag management and authentication platform called Ixkio with custom domain support, redirect handling and a mobile page builder, which is a useful reminder that the verification page is part of the product and not an afterthought.
The tag has to be married to the object
Cryptography solves cloning. It does nothing about a genuine tag peeled off a real item and stuck to a fake, which is the attack that happens once the chips get good. Seritag makes the same point in its own caveats, saying the chip should be hard to remove without damage and that the records behind it need managing properly. Options include tamper loop chips, where a conductive trace breaks on removal and the loop status rides inside the same signed message, destructive substrates, and encapsulation in a sealed housing. Grading slabs are the ideal case, since the holder is already tamper evident. Medicom Toy encapsulated BE@RBRICK figures that way, with Toppan NFC tags moulded into the leg rather than stuck on the box.
Provenance and life after the sale
Once an item carries a verifiable identity, the tap becomes an entry point rather than an answer. Grading history, sale prices and ownership transfers can hang off the same identifier, the provenance trail the art and watch markets have always kept on paper. Luxury has industrialised this already. The Aura Blockchain Consortium, founded in 2021 by LVMH, Prada Group, Cartier and OTB, issues digital product passports for member brands, and collectables will inherit that tooling.
The awkward practicalities
None of it is free. An ID-1 payment card is 0.76 mm under ISO/IEC 7810 and swallows an inlay comfortably, but a trading card on 12 pt stock is closer to 0.3 mm, so embedding at card level means a very thin inlay and a reworked lamination process. Foil and refractor finishes are conductive and will detune or shield a 13.56 MHz antenna unless the design allows for it. A secure element chip costs far more than a plain NTAG213, fine on a five figure card, hard to justify on a base common. And most valuable cards end up graded and sealed, so the insertion point is the grading house, not the printer.
The technology question is largely settled. Chips exist that cannot be practically cloned, they work with an unmodified phone, and there are deployments in coins, figures and luxury goods to learn from. Governance is the unresolved part: who holds the keys, who runs the verification service, and what happens to the record if that company folds. Seritag’s own framing is the right target, that the goal “isn’t to make authentication more complicated, it’s to make it almost effortless”. Worth settling before a first generation of badly built NFC trading cards teaches the hobby the wrong lesson.
Read more at https://seritag.com/news/nfc-collectables
