Vereev research library

Luxury Authentication Guides

Learn how to collect useful evidence, interpret codes and tags, compare the correct model and era, and understand the limits of self-checking before you buy, sell, or submit an item.

Use the LV date code checker View original comparisons

Louis Vuitton

Date-code interpretation, limitations, and complete bag review.

Luxury authentication

How to Authenticate a Louis Vuitton Bag

Authenticate a Louis Vuitton bag by checking whether its model, materials, construction, markings, hardware, and date-code era agree with one another. A date code, receipt, box, or single logo detail cannot establish authenticity by itself. Use same-model, same-era references and clear close-up photos.

Codes and markings

Louis Vuitton Date Codes: Formats, Meaning, and Limits

A Louis Vuitton date code is a production reference, not a unique serial number. Early codes used numbers for year and month; 1990–2006 codes commonly used two factory characters plus four month/year digits; 2007–early 2021 codes used the same shape but encoded week/year. Visible codes were phased out around 2021.

Authentication limitations

Why a Valid Louis Vuitton Date Code Does Not Prove Authenticity

A valid-looking Louis Vuitton date code proves only that the characters can be interpreted under a known format. The code is not unique, is not checked against a public official database, and can be copied onto a counterfeit item. Authenticity depends on the complete item and its era.

Gucci

Serial references, official NFC context, and complete bag review.

Luxury authentication

How to Authenticate a Gucci Bag

Authenticate a Gucci bag by comparing the exact model and production era across its shape, materials, monogram or logo, interior tag, number format, hardware, stitching, and construction. Serial numbers and NFC tags provide context, but neither replaces a complete item-level review.

Codes and markings

Gucci Serial Numbers: Meaning and Limitations

A Gucci bag's so-called serial number is generally a model/style reference plus a supplier or batch reference, not a unique identity number. Modern examples often use numeric rows on the back of an interior leather tag, but formats vary by era and product. Gucci does not offer a public serial lookup that proves authenticity.

NFC and product tags

Gucci Authenticity Tag, NFC, and QR Codes Explained

Gucci's official Authenticity Tag uses NFC and is available only on selected products. Gucci instructs users to open the Gucci app, enter the Gucci Tag section, and place a compatible phone near the item. An ordinary QR label, interior serial reference, or generic NFC scan is not the same feature.

Codes, Tags and Labels

Official QR, NFC, Certilogo and serial systems, what they prove, and their limits.

QR codes and NFC tags

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

No. An official QR code, NFC tag or code check shows that a label or code is recognized by the brand's system, but it cannot show that the label belongs to the item in front of you. Labels can be moved, codes copied and QR codes pointed at lookalike websites. Treat an official check as one piece of evidence that must agree with the exact model, materials, construction and seller history.

Labels and numbering

What the Numbers on a Maison Margiela Label Mean

The numbers on a Maison Margiela label are the house's Numeric Coding, which it introduced in 1997 as an index of its lines. The circled number shows which line an item belongs to, such as 1 for the collection for women, 10 for the collection for men, 11 for accessories and 22 for shoes. A correctly circled number tells you which line the item claims to be from. It does not prove the item is genuine.

QR code and NFC labels

Moncler QR Code and NFC Authenticity Label Explained

Moncler's authenticity label carries a unique alphanumeric code and, on newer garments, an NFC tag that Moncler says can be verified at code.moncler.com, a site it manages directly. The site asks you to scan the NFC tag with your phone, or to log in and type the code manually if the tag will not read. A result speaks to the label, so the garment it is sewn into still has to agree.

Certilogo codes

Stone Island Certilogo Code and QR Label Explained

Stone Island's Certilogo check uses the 12-digit CLG code and QR code on the security label inside the garment. Enter the code on Stone Island's authenticity page, which forwards to its Certilogo service, or scan the QR code with the item in hand. It covers Stone Island and Shadow Project products from Spring Summer 2014 and Junior garments from Fall Winter 2020-2021, but not footwear or some accessories. A result is supporting evidence, not a verdict on the whole garment.

Serial numbers

Rimowa Serial Number, NFC Tag and Ownership Certificate Explained

Rimowa puts a serial number on all its suitcases and says to look on the outside of the frame near the hinge, with placement varying by model. Owners use it to register the product in a Rimowa account. Suitcases bought from January 1, 2023 also have an NFC tag behind the telescopic handle that leads to registration and a digital Ownership Certificate. Rimowa's FAQ answers do not describe either as a buyer's authenticity check, so both are supporting context.

Serial numbers

Omega Serial Number, Warranty Card and Extract of the Archives Explained

Omega says the serial number is on the warranty card and engraved on the back of current watches or on a lug, and usually inside the caseback and on the movement of vintage watches. The card should show that serial, the reference, the purchase date and the retailer. Published reports say an Extract of the Archives records when a watch was produced without inspecting it. None of these proves authenticity alone; each must agree with the watch.

Archive extracts and certificates

Audemars Piguet Extract from the Archives and Certificate of Authenticity Explained

Audemars Piguet offers two official documents. The Extract from the archives certifies that a watch's case and movement numbers appear in AP's records, and AP says it does not warrant authenticity. The Certificate of Authenticity certifies that the watch, its materials and components are authentic after AP's experts in Le Brassus examine it, and includes current pictures. Either way, match any document to the watch itself.

QR code labels

New Balance QR Code and Tongue Label Authenticity Check Explained

New Balance says that starting in May 2025 it is replacing the data matrix on shoe tongue labels with a QR code. Scanning it should open a microsite, where you compare the sizing and other details with the shoe. New Balance says a code that opens a store or other website means the shoe is not authentic. Earlier pairs cannot be self-checked, and a printed code can be copied, so treat a match as supporting context.

Archive extracts and certificates

Patek Philippe Extract from the Archives and Certificate of Origin Explained

Patek Philippe's Extract from the Archives is a paid transcript of its archive records for a watch first sold at least ten years ago, listing details such as the caliber, movement and case numbers, dial, bracelet or strap, date of completion and date of sale. Patek checks submitted photos against its records, but says the Extract is neither a proof of authenticity nor a warranty document, so its numbers must match the watch in hand.

Digital certificates

Breitling Digital Passport and Warranty Card QR Code Explained

Breitling's digital passport lets an owner register a watch on Breitling.com, for new watches by scanning the QR code on the warranty card, and reach its digital certificate of ownership, COSC certificate, user manual and warranty status. Ownership is transferred through the Breitling account. Breitling says the passport covers watches produced since 2013 and that authentication requires sending the watch to a Breitling Main Center, so a passport is supporting context rather than proof.

Serial numbers and microchips

Chanel Serial Numbers and Microchips Explained

A Chanel serial number dates a bag; it does not authenticate it. From the mid-1980s until 2021, Chanel bags and small leather goods carried a serial sticker with a matching authenticity card, and the first one or two digits of the number point to an approximate production period. Since 2021, resellers report a metal plate with an embedded microchip and an 8-character code instead, and that code no longer shows a year. Chanel offers no public lookup, so the number can only be checked against the bag itself.

Date stamps

Hermès Date Stamp Chart: Blind Stamp Letters by Year

An Hermès blind stamp is a small letter pressed into the leather that marks the year a piece was made, usually next to a craftsman's code. Letters ran in alphabetical order with no shape from 1945 to 1970, inside a circle from 1971 to 1996 and inside a square from 1997 to 2014. Since 2015 they have no shape and are out of order, from T for 2015 to K for 2025, and collectors report G for 2026. The stamp dates a piece; it does not prove it is genuine.

Date codes

Dior Date Code Explained: How to Read the Code Inside a Dior Bag

A Dior date code is a short code stamped on a small leather tab inside the bag. Authentication services describe codes from the early 2000s onward as two numbers, two letters and four numbers, such as 02-MA-0253: the letters stand for where the item was made, and the last four digits give the month from the first and third digits and the year from the second and fourth. Late-1990s codes have only the letters and four numbers. A correctly formatted code fits a period; it does not prove a bag is genuine.

NFC tags and authenticity cards

Prada Authenticity Card and NFC Tag Explained

Prada says it guarantees product authenticity through the Aura Blockchain Consortium. Its products carry an NFC tag, in most cases hidden inside, and after purchase the owner can request a Digital Certificate of Ownership by tapping the tag with a compatible smartphone. Prada bags have also come with an authenticity card in a black envelope. Cards can be copied and tags can be switched off, so each is supporting evidence that must agree with the item.

Certificates of Authenticity (COA)

What a COA is, which brands issue one, how to spot a fake, and how to check a Vereev certificate.

Certificate of Authenticity

What Is a Certificate of Authenticity (COA)?

A certificate of authenticity (COA) is a document in which a named issuer states that an item is genuine. It is only as reliable as that issuer and its link to the exact item. A strong COA names who issued it, describes and usually photographs the item, carries a unique number you can check on the issuer's own website, and gives a result and a date. A COA is evidence, not a guarantee: it can be forged, copied or moved to a different item.

Certificate of Authenticity

How to Tell If a Certificate of Authenticity Is Fake

A certificate of authenticity is only trustworthy if you can confirm it with its issuer yourself and it matches the item. Find the issuer's official website on your own, look up the certificate number there, and compare the record's details and photos with the item. Treat a certificate as unreliable if the issuer cannot be found, the number does not open a record, the QR code leads to another website, or the details do not match.

Certificate of Authenticity

Do Designer Bags Come With a Certificate of Authenticity?

Usually not. Most luxury houses do not put a certificate of authenticity in the box. Louis Vuitton bags do not come with one, Hermès guarantees authenticity only for items bought through its own channels, and resellers report that Chanel replaced its authenticity cards with microchips in 2021. A few brands now issue digital certificates through an NFC tag, including Prada, Maison Margiela and Rimowa. A missing certificate is therefore normal, and a certificate presented as an official document from a brand that does not issue one is a warning sign.

Certificate of Authenticity

Can I Get a Certificate of Authenticity Online?

Yes. After item-level review, a service may issue a digital Certificate of Authenticity tied to the submitted evidence. A meaningful certificate identifies issuer, item, result, date, and verification method; it is not the same as a brand document, receipt, warranty, appraisal, or value guarantee.

Certificate of Authenticity

Authentication Result vs Certificate of Authenticity

An authentication result is the conclusion for submitted item evidence. A Certificate of Authenticity documents that conclusion and verification details. Neither is automatically an appraisal, receipt, warranty, ownership record, or manufacturer-issued certificate.

Chrome Hearts

Real vs fake checks for jewelry, clothing, hats and glasses, plus stamps and tags.

Real vs fake overview

Chrome Hearts Real vs Fake: How to Spot a Fake

There is no single tell. Real Chrome Hearts is judged by comparing the piece with a confirmed genuine example of the same model and size: the stamps, engraving, size, weight and casting on jewelry, the wash, barcode and neck tags on clothing and hats, and the markings and hinges on glasses. Stamps, tags, receipts and certificates can all be copied, so none of them proves an item is real on its own.

Jewelry authentication

Chrome Hearts Rings and Jewelry: Real vs Fake

A real Chrome Hearts ring or pendant matches a genuine example of the same model and size in every detail at once: crisp, evenly spaced 925 and year stamps, brand engraving in the right font and spelling, hand-finished engraving depth, size, weight, clean casting and sharp details. Fakes are often slightly smaller and lighter, with machine-even engraving, but no single check proves a piece is real.

Streetwear authentication

Chrome Hearts Hoodies, Tees and Jeans: Real vs Fake

Start with the tags. On genuine Chrome Hearts hoodies the wash tag runs the logo vertically down the left side and usually lists the materials in English, French, Mandarin, Korean and Japanese in even lettering, and the barcode tag prints the CH logo darker than the barcode. Fakes often get the thickness of the lettering wrong. Then compare the print, stitching and fabric with a genuine example of the same design; no tag proves a garment is real on its own.

Streetwear authentication

Chrome Hearts Trucker Hats: Real vs Fake

Start with the tags inside. A genuine Chrome Hearts hat has a fabric tag that usually lists the contents in five languages beside a vertical Chrome Hearts banner logo, in the right font and with even spacing, and a barcode tag printed in two ink colors, with the CH logo darker than the barcode and the numbers. Then compare the patches, stitching and button with a genuine example of the same hat. Tags can be copied, so they never prove a hat is real on their own.

Eyewear authentication

Chrome Hearts Glasses and Sunglasses: Real vs Fake

Genuine Chrome Hearts frames are marked MADE IN JAPAN or FRAME MADE IN JAPAN, show the model name and size in clean lettering, have an even finish with no rough edges and, on many metal styles, carry a deep logo engraving on each nose pad. Many genuine acetate frames also fold flat only when the left arm is folded first. Check them together, because none of them proves a pair is real on its own.

Stamps and tags

Chrome Hearts Stamps, 925 Marks and Tags Explained

Chrome Hearts jewelry is stamped inside with the metal, such as 925 for sterling silver, and a year; most rings also carry the brand name on the edge, and some pieces have a © mark. Fakes are stamped too, so what matters is how the stamps are made: crisp, evenly spaced numbers, the right font and spelling, a year that fits the model, and engraving depth that varies like hand-finished work. Clothing, hats and glasses have their own tags and markings.

Buyer and App Guidance

Photo evidence, pre-purchase protection, and the Vereev workflow.

Photo guidance

Designer Bag Authentication Photo Guide

For bag authentication, photograph the full front, back, base, both sides, interior, logos, heat stamps, serial or date codes, hardware engravings, zipper construction, stitching, corners, handles, and any receipt or repair record. Use soft daylight, a plain background, and unedited high-resolution files.

Buyer safety

Best Ways to Authenticate a Luxury Bag Before Buying

Before buying a luxury bag, verify the seller and return terms, identify the exact model, request original detail photos, compare the item with same-era references, use protected payment, and obtain item-level authentication while you can still cancel or return the purchase.

Product education

Luxury Authentication App: How Vereev Works

Vereev lets you create an account, choose a product category and brand, use tokens for an authentication request, upload the required item photos, submit the order, and receive the completed result and digital certificate in the app. Coverage and photo requirements vary by item.

Handbag authentication

How Do I Know If My Designer Bag Is Real?

Do not decide from one logo, serial number, receipt, or online checklist. Identify the exact bag and period, compare shape, materials, construction, hardware, markings, and provenance with reliable same-model evidence, and use a documented item-level review when the financial risk matters.

Online authentication

Where Can I Authenticate a Luxury Bag Online?

Use an online service that supports the exact brand and category, requests structured same-item photos, explains its methodology and limits, and returns a documented result. Vereev combines advanced authentication technology with review by certified authenticators.

Luxury authentication

What Is the Best Way to Authenticate Luxury Goods?

The best method is layered: identify the exact product, collect complete evidence, use technology to organize and compare signals, obtain category-appropriate expert review, and retain transaction protection. Depth should match value, rarity, category, repair history, and consequences of error.

AI-assisted authentication

Can AI Authenticate Designer Products?

AI can help find candidate products, check image quality, read markings, compare visual patterns, and prioritize inconsistencies. It should not be treated as an infallible one-photo oracle; exact-item evidence, relevant reference data, calibrated uncertainty, and expert interpretation remain important.

Luxury resale verification

How to Authenticate an Item Before Buying It

Ask for current guided photos of the exact item, submit them for review before payment or during a protected return window, verify seller and ownership context, and compare the delivered product with the reviewed evidence before releasing funds.

Expert authentication

How Do Luxury Authentication Services Work?

A service identifies the claimed product, collects structured evidence, compares model- and era-relevant construction, materials, markings, and provenance, resolves conflicts through technology and expert review, then issues a documented conclusion or requests more evidence.

Counterfeit detection

How to Avoid Buying Counterfeit Luxury Goods

Verify the seller and exact product, refuse incomplete or borrowed photos, treat unusual prices and pressure as risk signals, use item-level authentication, pay through a protected channel, and inspect delivery before the return deadline.

Online authentication

What Photos Are Needed for Online Authentication?

Online authentication needs sharp full views plus category-specific close-ups of construction, materials, hardware, labels, markings, codes, interiors, soles, movement details, or packaging relationships. Every photo must show the same exact item without filters, glare, or hidden damage.

Sneaker authentication

How to Authenticate Sneakers Before Resale

Confirm exact SKU, colorway, size, and release; photograph both shoes, labels, insoles, soles, stitching, logos, materials, and packaging; compare same-release construction; document condition and repairs; then obtain item-level review before listing when risk matters.

Watch authentication

How to Check a Luxury Watch Before Buying

Identify the exact reference and configuration, compare dial, case, bezel, crown, bracelet, clasp, engravings, serial context, and dimensions, review service and ownership records, use protected payment, and arrange movement inspection by a qualified watchmaker when needed.