How to Check an Item Is Genuine Before You Buy

Why authentication starts before you pay

On a marketplace, a fake does its damage before any protection wakes up. You pay, you wait, the parcel arrives, and only then do you find out — which means the cheap moment to catch it is the moment before you press pay. Vinted's UK help pages do give a buyer a path: a counterfeit counts as significantly not as described, reported within 2 days of the delivery notice, on "Buy now" orders paid through the platform. That is a refund, not a rescue — your sourcing time is gone either way.

As a reseller you are a buyer first, so every fake you buy is a double loss: the money, and a listing you can never publish. Vinted's Catalogue Rules call counterfeits "strictly forbidden" and warn that selling them could expose sellers to civil and criminal proceedings.

One honesty note before the method. Nobody publishes a reliable count of how many fakes circulate on any of these marketplaces, and no service states what share it catches. We will not quote a number we cannot source. What follows is a method and a set of documented service facts — not a statistic.

The check below is one of four you run on any purchase candidate, next to price, demand and condition. The full sequence lives in how to evaluate a resale deal in 60 seconds, and the photo-level fake patterns — stock images, reused photos, replica-farm accounts — are catalogued in how to spot fakes and replica listings. Here we stay on the pre-pay side: what you check, in what order, and when to walk.

The universal two-minute check

The order matters more than the length. Price and photos kill most bad buys in the first minute; serials and paperwork only get your attention when the item survives that far.

Two rows are backed by platform rules, not taste. Vinted's Catalogue Rules require real photos: listings "cannot be replaced with stock photos, photos from ads and watermarked images". And the signals in row 3 come from Vinted's own help page on commercial selling, which lists many new or tagged items, identical items in several colours or sizes, and bulk-bought or dropshipped low-value goods among the signs it looks at. A seller matching those signals is not automatically selling fakes — but the price of being wrong is yours to carry, so treat the row as a filter, not a verdict.

Row 6 is the one people break when a deal feels urgent. Protection applies to orders paid through the platform; a transfer outside it leaves you arguing with a stranger. Row 7 is where the sourcing guide's max buy price method earns its keep: an item you can only afford if everything turns out true and perfect is not a bargain, it is a bet with your margin as the stake.

Bags and leather goods: what to look at

Bags reward a fixed route through the physical item, or its photos if you are buying online. Work top to bottom and compare against a reference for the exact model, because brands change stamp formats, fonts and hardware over the years — a single "fake signs" list from a blog ages badly.

• Heat stamp and fonts. The brand stamp should sit centred and even, with consistent letter spacing and depth. Compare with the brand's own product photos or a long-running reference for that model and era.
• Stitching. Even stitch length, straight lines, no loose thread ends at corners. Counterfeiters have improved here, which is exactly why stitching is a filter and not a verdict.
• Hardware. Weight, engraving depth, and closures that line up and close cleanly. Lightweight, shallow-engraved hardware is a flag worth one more photo.
• Shape and structure. A structured bag holds its shape empty. Slouching where the model should stand is visible in photos if you ask for one.
• Interior. Lining material, inner label, pockets. Ask for one interior photo on every branded bag; sellers of real items send it without drama.
• Codes and stamps. Date codes or serial stamps vary by brand and year. Check where the code should sit for that model rather than hunting for "a number somewhere".
• Smell. A strong chemical smell is a signal, not proof. Leather and glue smell differently; treat it as a tiebreaker, never as the answer.

Example: a quilted flap bag asks 480 € while every comparable ask for the model sits between 1,400 € and 1,900 €. Nothing else matters until that gap is explained — provenance, damage, a typo in the listing. If the seller's story does not survive one question, row 1 of the two-minute check has already done its job.

Sneakers, watches and electronics: category notes

Each group has one check that pays for itself, and a habit of buying only what you can verify.

Sneakers. Compare the box label with the shoe: size, style code and colourway should match each other and the listing title. Look at stitch density along the panels and the print on the insole. If a pair is priced like a grail, buy only where a verification route exists on the selling side too — routing a flip through a checked channel is part of the buy decision, not an afterthought.

Watches. Check the reference number against the model, ask for the papers, and treat "runs fine" as a claim, not a service record. For anything expensive, the honest options are a watchmaker's look-over before you pay or a price that assumes you might be wrong. If you cannot verify a watch yourself and the seller will not meet either route, the watch is not for you. Where watches sell matches price bands to markets with checks.

Electronics. Serial numbers are checkable: most makers run a coverage or activation checker on their own site, and a mismatched or already-claimed serial ends the conversation. For cameras, a shutter count — where the maker's tools report it — says more than "lightly used". Ask for a photo of the serial next to the item, and prefer sellers who list what is missing instead of "full set".

Platform verification services compared (checked 13 Sept 2026)

Two kinds of service exist. A buyer add-on you can switch on when purchasing (Vinted's Item Verification), and sale-side routing that happens automatically when an eligible item sells (eBay's programme). They answer different problems: the first protects a specific purchase you are about to make; the second protects your buyer — and, by keeping fakes off your sold history, your account.

eBay (AG). On the US, UK and German help pages, enrolment is automatic for eligible items, free to the seller, with no opt-in or opt-out. The item ships seller → authenticator → buyer, inspection generally happens within 2 business days, and an item that fails is not sent to the buyer: the buyer is refunded and the item returns to you. Local pickup, PO boxes and customized items are excluded. Thresholds differ per market:

Below the mandatory line, some categories offer an optional buyer-paid check instead — £20 or €20 at the low end per the UK and DE pages, and around £99 / €100 / $80 for watches under the threshold in those markets. Two planning notes from the same pages: eBay's US page warns some orders may be delayed 7 days or more, and US payment holds tied to the programme release 24 hours after the item passes inspection and ships. We checked three markets; availability elsewhere is not something our sources confirm, so check your own.

Vinted Item Verification. A buyer add-on priced on the public price lists: 45 zł on vinted.pl, £10 in the UK, €10 in France and Germany (September 2026). The price lists say the fee consists of a verification service fee plus shipping costs from the seller to the hub, and they do not publish which categories qualify or what the check includes. The step-by-step mechanics are in Vinted Item Verification. For a reseller the arithmetic is the point: 45 zł is invisible on a 2,000 zł bag and decisive on a 300 zł one, so decide per item and put it in the buy cost before you compare listings.

Vestiaire Collective, StockX, GOAT — what our sources actually cover. These platforms are built around checks, but the pages we opened document fees. Vestiaire's fee page shows a 12% band with fixed fees at both ends plus 3% processing (GBP listings, checked 13 September 2026) and says nothing on it about who checks what, when. StockX's page calls its main marketplace "Verified Marketplace" and documents a transaction fee from 9% down to 7% by seller level plus 3% processing with regional minimums — again, fees, not process; we read it through a reader proxy because the page blocks direct fetches. GOAT's fee policy (dated 1 August 2026) documents a 9.5% commission plus a location seller fee — $6 for sellers in France, Poland, Austria and Belgium — and commission penalty tiers that rise as your rating falls after cancellations; selling from outside the US is, per that page, "only available to select sellers at this time". So we can tell you what each costs and not how each checks, and we will not fill that gap from memory. Where designer bags sell compares the selling routes with the same discipline.

Notice the pattern: no page we checked publishes a false-positive rate, a detection rate, or any count of fakes caught. Nobody outside these companies can honestly say "the platform catches X%". Your two-minute check stays the first line; these services are a second line where the item's price justifies them.

Paperwork: receipts, cards, boxes — and why fakers have them too

Sellers of fakes copy receipt cards, so paperwork alone proves little. A card in the right font next to the wrong bag is still a card next to the wrong bag. What paperwork can do is support the rest of the check when the details line up.

• A dated receipt whose shop, date and model match the story you were told
• The model or article code on the box label matching the item's stamps
• A care booklet or card that matches the brand's current or period format
• Service or repair records for watches and expensive leather
• Photos of all paperwork taken at buy time, filed with the item's row
• Your listing wording that says what the paperwork is — and that you cannot verify it

That last line matters for your resale. "Original receipt, not verifiable by me" is an honest sentence that costs you less than a dispute does. Photographing paperwork when you buy costs seconds and gives you two things later: a better listing, and your own record if a buyer claims the item is not what you said.

What paperwork cannot do is transfer authenticity from one item to another. If the physical checks in the sections above fail, a perfect receipt is a reason to ask harder questions, not a reason to pay.

Risk rules: buy size, exposure, when to walk away

Authentication reduces the chance of a bad buy; position sizing limits what a bad buy costs. Both belong to the same decision.

Worked example. Say you source with 1,500 zł a month and buy ten branded items at roughly 150 zł each. One fake costs you 150 zł — a tenth of the month's cash, recoverable. The same month built around one 1,500 zł watch turns the same mistake into a lost month. Nothing about authentication changed; the exposure did. That is why the cap is a rule you set when calm: a maximum share of monthly sourcing cash for any single branded purchase, and a lower cap for categories you cannot verify yourself.

Decision rules that follow:

• Cap single branded buys at a share you set in advance — for example a tenth of the month's sourcing budget — and never raise it mid-purchase because the listing looks urgent.
• Route high-value flips through a market with a check on the selling side. If eBay's programme covers the category and price band where you plan to sell, a fake you miss comes back to you instead of reaching a buyer. That shapes where you sell as much as what you pay.
• One refused photo ends the negotiation. A real seller sends the serial shot; a copy-paste seller has nothing to send.
• Never buy a known replica to resell as one. Beyond the platform bans quoted above, it is the one mistake on this page with consequences outside your spreadsheet.
• If you already paid for a fake, claim inside the window where protection applies and write the loss into your log — the pre-buy risk checklist in how to estimate risk before you buy stock turns that loss into a smaller next buy.

The exit test from the two-minute check is the honest summary of this page: if a purchase only makes sense when the item is genuine, perfect and instantly saleable, the margin you computed is not a margin. It is the price of a story you have not verified — and no verification service, on any platform, will care as much about your money as you do.

Related guides

• where to sell designer bags
• where to sell watches
• reselling gaming consoles