How to Vet a Wholesale Supplier: 12 Red Flags to Check First

A bad wholesale supplier costs more than the order. If the goods are inauthentic, diverted, or simply not what the invoice says, the exposure is your Amazon account — and an account suspension is not something you recover from by disputing a charge.

The good news is that most problem suppliers reveal themselves before you send money, and usually in the first two or three exchanges. Here is what to look for, what to ask, and what a supplier worth ordering from looks like from the buyer's side.

Red flags

1. They will not tell you where the goods come from

You are not entitled to their whole supply chain, but a legitimate wholesaler can say plainly what they are: manufacturer, authorized distributor, liquidator, or trader in overstock and closeout inventory. Each is a real business model.

Vagueness is the problem. A supplier who deflects the question entirely, or answers with reassurance rather than specifics, is the one to walk away from — particularly if you intend to use their invoices for ungating, where the source has to survive scrutiny.

2. Prices well below the going wholesale rate

Wholesale margins on branded consumer goods are not enormous. A price far below what everyone else quotes usually means something specific: goods near or past expiry, grey-market imports meant for another region, returned or repackaged stock, packaging in the wrong language, or counterfeits.

Some of those are legal to sell and still ruin you on Amazon, because the customer receives something that does not match the listing. Ask what explains the price. A real closeout has a real story — a discontinued line, a packaging change, an overstock position. If there is no story, assume the worst one.

3. Wire transfer or crypto only, especially on a first order

Bank transfers are normal in wholesale, and many established suppliers use them as standard. The red flag is a supplier who refuses every method with recourse on a first order with a new customer, or who pushes hard toward cryptocurrency.

Pair this with pressure — a price good only today, or stock about to be sold to someone else. Urgency plus irreversible payment is the core structure of most wholesale scams.

4. No verifiable business identity

You should be able to find a registered company name, a physical address that is not a mail drop, a landline or business phone that is answered, and a website that predates last month.

For US suppliers, check the company against the Secretary of State business registry in the state they claim to be in — this is free and takes two minutes. A supplier who cannot be found in any registry, anywhere, is a supplier Amazon will not be able to verify either.

5. A free email address on business correspondence

Minor on its own, meaningful in combination. A wholesaler operating at genuine volume has a domain. Quotes and invoices arriving from a Gmail or Outlook address, with no matching domain anywhere, suggest an operation with no fixed identity.

6. They cannot produce a proper invoice

Ask before you order whether they can issue an invoice with your full legal business name and address, their own full business details, an invoice number, a date, and line items naming the brand and product.

Every real wholesaler can do this — it is ordinary bookkeeping, and the exact fields are covered in what makes an invoice verification-ready. A supplier who cannot, or who becomes evasive when asked, is telling you their paperwork will not survive verification.

7. They will not confirm the sale to Amazon

Amazon may contact a supplier to verify an invoice. Ask directly: if Amazon contacts you about this invoice, will you confirm it?

A supplier who hesitates here is disqualifying. It means either they do not want the scrutiny, or they will not be reachable when it matters — and in both cases your application fails through no fault of your own.

8. No stated policy on damages, shortages, or returns

Cases arrive short. Pallets get damaged. What happens next should be agreed before you order, not negotiated after. "We'll take care of you" is not a policy. A window for reporting shortages and a stated remedy is.

9. Stock lists that never change

A supplier sending the identical spreadsheet for months, with the same quantities, is often not holding that stock at all — they are brokering, and will source it only once you pay. That can work, but it introduces delay and risk you were not told about. Ask whether the goods are in their warehouse now.

10. Reluctance to send photographs

Ask for photographs of the actual stock: cases, labels, batch codes, expiry dates where relevant. A supplier holding the goods can do this the same day. Stock photos lifted from the brand's own site, when you asked for the pallet in their warehouse, is an answer in itself.

11. No sample or small trial order permitted

A supplier confident in their goods will usually let you buy small before you buy big, even if the unit price is worse. A hard refusal to sell anything below a large minimum, to a new customer who has asked reasonable questions, is worth taking seriously.

12. Pressure to skip your own checks

Any supplier who treats verification questions as an insult is a supplier who expects not to be checked. Professionals in this trade are asked these questions constantly and answer them without friction.

What a good supplier looks like

Inverting the list is useful, because it gives you something to compare against rather than just things to fear:

• They state clearly what kind of business they are and where their goods come from.
• Their pricing is unremarkable, and where it is low they explain why.
• They have a findable registered entity, a real address, and a phone someone answers.
• They invoice properly, with your exact legal details, on request.
• They confirm they will respond to a verification contact.
• They have a written position on shortages, damages, and returns.
• They send photographs of actual stock, including batch and expiry information.
• They answer questions directly and are not rattled by being checked.

A pre-order checklist

Before a first order with any new supplier:

1. Search the company name in the relevant state or national business registry.
2. Call the phone number on their website and confirm a person answers as that business.
3. Check how long the domain has existed and whether the site has real depth.
4. Ask what kind of supplier they are and where the specific goods come from.
5. Ask for photographs of the actual stock, with batch codes and expiry dates.
6. Confirm they can invoice with your exact legal name and address, an invoice number, and branded line items.
7. Ask whether they will confirm the invoice if Amazon contacts them.
8. Get the shortage, damage, and return policy in writing.
9. Confirm whether the stock is in their warehouse now, and what the handling time is.
10. Start smaller than you would like to — and price the order on landed cost, not unit cost.

None of this is difficult. It is perhaps forty minutes of work, and it is the cheapest insurance available on an account that took you a long time to build.

One thing to keep in perspective

Passing every check above does not make a supplier's goods authentic, and no amount of diligence transfers your responsibility as the seller of record. Your own inspection of what arrives — packaging, labeling, batch codes, expiry dates — still matters on every order, including from suppliers you have used for years.

Where OneStopSKU fits

We are a US wholesale supplier of branded consumer goods for Amazon, eBay, and Walmart resellers. Our business details are published on our contact page — legal entity name, address, phone, and email — precisely so they can be checked against the list above rather than taken on trust.

We invoice with your exact legal business details, name brands and products on line items, respond to supplier verification contacts, and keep minimum order quantities flexible so a first order can be a genuine test rather than a leap. Ask us the questions on this checklist — we would rather you did.