Direct answer: Supplier vetting is where counterfeit problems are cheapest to stop, because a fake stopped at purchasing never becomes a listing, a customer complaint, or an account strike. The working checks are unglamorous: verify the business exists and matches its documents, ask how the supplier sources the brand and expect a specific answer, compare the offered price against the plausible economics of genuine goods, order samples and compare them against a known genuine unit in packaging, print, weight, and finish, and start with a small order even when the price tempts you to load up. A supplier who cannot explain where branded goods come from is explaining it, in the only way that matters.
Sellers imagine counterfeits as something that happens to their listings. A meaningful share of the time, counterfeits are something that happened to their purchase order, weeks earlier, at a price that already contained the whole story.
The marketplaces punish the account that sold the item, not the account that supplied it. That asymmetry makes purchasing the most important enforcement surface a seller owns, and the least examined one in most operations.
Genuine branded goods move through distribution with margins that have a floor, and an offer far below every legitimate channel is not a negotiation triumph. It is a disclosure. Deep discounts on current, in demand branded products from a supplier with no clear allocation story should be read the way a bank reads a too good rate: as the product itself.
Check the number against reality before any other diligence, because it filters fastest. If the economics only work if the goods are diverted, gray market with no warranty standing, or fake, then one of those three is what you are buying, and only one of them is even arguably a business.
Ask where the goods come from and grade the answer on specificity. Authorized distribution, a named liquidation channel, a documented overstock position: these can be checked. A warehouse contact, a special relationship, and volume from overseas cannot, and vagueness at this question is not a language barrier. It is the business model keeping its shape hidden.
Documents help when they connect: invoices from the suppliers own source, consistent business registration, an address that exists and matches. A folder of certificates that do not name your product or your supplier is decoration, and experienced sellers learn to ask the connecting question politely and watch whether the conversation survives it.
Buy the genuine article from an authorized channel first, at retail if you must, because it is the reference standard every sample gets judged against. Then compare in the order counterfeiters fail: packaging print quality and color, insert text and errors, weight, materials and finish, smells, seals, batch and date coding format, and the small molded or printed details nobody photographs for a listing.
One mismatch can be a production variation. A pattern of small wrongness, each detail slightly off in the direction of cheaper, is a verdict. Photograph the comparison either way. If the supplier is genuine, you have quality records. If they are not, you have the file your future dispute, chargeback, or report will need, built before there was a crisis to build it under.
First orders stay small even when the sample passes and the price begs otherwise, because the sample is the one unit a bad supplier knows will be inspected. The shipment is the sample of the supplier. Inspect incoming stock on a continuing basis, spot checking units against the reference, because supplier quality drifts and supplier ownership changes.
And keep the paperwork chain intact: purchase records, invoices, and correspondence filed per supplier and per lot. When a marketplace asks for your supply chain, and one day it will, the sellers who answer in an hour are the ones who treated vetting as a filing habit rather than a memory. The file is the difference between a listing strike and a suspension story you tell for years. Build it before you need it, while the building is boring.
Related reading: Marketplace Appeals That Work: Evidence Order, Not Volume, Counterfeit Returns: When the Box Comes Back With a Fake Inside, and Cease and Desist Letters for Sellers: When to Send One and What It Must Say.
A price on branded goods that sits far below legitimate channels, paired with a vague sourcing story. Either one alone deserves questions. Together they usually mean the goods are diverted or counterfeit, and the risk lands on your account, not the supplier.
Check that the business exists and its documents are consistent, ask specifically how it sources the brand and verify the answer, review its invoices and trading history, and test with samples compared against a known genuine unit before placing meaningful orders.
Because you need a reference you are certain is authentic. Counterfeit differences are usually small and cumulative: print, weight, finish, coding, and inserts each slightly off. Without a known genuine unit beside the sample, those differences are easy to rationalize away.
No. Samples can be genuine while shipments differ, and suppliers change sources and ownership. Keep spot checking incoming lots against your reference unit and keep purchase documentation filed per lot. Ongoing verification is what makes the initial vetting worth anything.