Do QR Codes and NFC Tags Prove a Designer Item Is Real?

Official systems differ in what they cover and how they work. The summaries below come from each brand's own pages or announcements, and every system applies only to the products and periods the brand names.

Brands without a published check are just as common. Christian Louboutin says its boutiques do not issue authenticity certificates, Arc'teryx's counterfeit guidance focuses on construction rather than a code, and we found no public authenticity check from Loewe or Miu Miu. For those brands, a card or code presented as official proof deserves questions.

A positive result is a brand-run signal about the label, tag or code you checked. When that label is clearly original to the item and the product details in the result match what is in front of you, it is valuable evidence.

It cannot show that the label belongs to this item. Labels and tags are separate components that can be cut from a genuine piece and sewn or glued into another one, and printed codes can be photographed and reproduced. Certilogo, which runs Stone Island's check, says a tag with a CLG code does not necessarily mean the product is authentic.

A result also says nothing about later repairs, replaced parts or alterations. Those still have to be judged from the item itself.

Run the check yourself, on the item in hand, through the brand's own channel: the Gucci app for Gucci tags, code.moncler.com for Moncler, Stone Island's authenticity page for its Certilogo codes, and rimowa.com for Rimowa registration. Certilogo notes that a code published online or a seller's photo cannot confirm a product before purchase, because the check needs the product in hand.

Check the web address before you type anything. A printed QR code can be made to open any website, so a code that leads to an unfamiliar domain, asks for payment details or pushes an app you did not expect is a warning sign, not a verification.

Official systems start on specific dates and cover specific products. Stone Island's check covers pieces from the Spring Summer 2014 collection onward and excludes footwear and some accessories, Moncler says it began enhancing its label system in 2021 so label versions differ, OTB's certificates start with the Fall/Winter 2024-25 collections, Rimowa's NFC tag covers suitcases bought from January 1, 2023, and Gucci's tag is available only on selected items.

Tags can also fail to read because of phone position or settings, and some can be switched off. Prada says its NFC tag can be irreversibly deactivated, and Maison Margiela says owners can ask Client Service to deactivate the NFC technology. A genuine older or unsupported item will not carry the feature, so its absence calls for the rest of the evidence, not a verdict.

Many brands print or stamp codes that were never designed as public authentication tools. A Louis Vuitton date code records production context, a Gucci serial reference identifies a product, and Rimowa uses its serial numbers to register suitcases. Counterfeiters copy all of these, so a valid-looking code on a fake is common.

Authenticity cards, certificates and receipts are separate documents that can be copied or moved between items. They only help when every detail agrees with the item they came with.

A reviewer treats a code or tag result as one line of evidence alongside the exact model and version, materials, construction, markings, hardware, condition and the seller's history. It carries the most weight when all of these agree.

When there is no official check, when a tag will not read, or when the result and the item disagree, an item-level review of complete photos can show whether the rest of the evidence holds together. Vereev is independent of the brands named here, and its result is not a brand determination.