The most important things to look for in a wholesale supplier are authenticity, brand authorization, and documentation — not the lowest price. A supplier should sell genuine, traceable product; give you the right to resell it (critical for gated brands); and provide proper invoices and certificates that marketplaces accept. After those, evaluate transparent pricing, reasonable minimum-order terms, reliable lead times and stock, verifiable reviews, and responsive support. For anyone reselling on Amazon or Walmart, authorization and documentation are make-or-break: a cheap supplier who can't prove authenticity will get your listings pulled.
The 8-Point Checklist
| # | What to check | Why it matters |
|---|---|---|
| 1 | Authenticity | Genuine, traceable product — not gray-market or counterfeit |
| 2 | Brand authorization | The right to resell, especially for gated brands |
| 3 | Documentation | Invoices/COAs marketplaces accept for approval & defense |
| 4 | Transparent pricing | All-in landed cost, no surprise fees |
| 5 | Minimum order terms | MOQ that fits your capital and turnover |
| 6 | Lead time & stock | Reliable fulfillment and consistent availability |
| 7 | Reviews & track record | Verifiable reputation outside the supplier's own site |
| 8 | Responsive support | A real contact who resolves issues and returns |
Why Documentation Is Make-or-Break
For marketplace sellers, documentation isn't a nice-to-have — it's the thing that keeps your listings live. Amazon and Walmart require an invoice from an authorized source to approve restricted brands and to defend against authenticity complaints. That invoice generally needs your business details, the supplier's details, the brand, quantities, and dates.
This is why "genuine product" alone isn't enough: you can buy authentic goods from an unauthorized wholesaler and still fail brand approval because the paperwork doesn't establish an authorized chain. The supplier's willingness and ability to document authenticity is the highest-leverage thing to verify — read our supplier documentation guide for exactly what to request.
Red Flags to Walk Away From
- Prices far below market — often counterfeit or diverted goods.
- Won't provide a proper invoice — the single clearest disqualifier for resale.
- No verifiable business identity — no registered entity, address, or real contact.
- Untraceable payment pressure — wire-only, crypto-only, or off-platform demands.
- Vague product origin — can't or won't say where the goods come from.
- No return/defect policy — you absorb all the downside.
Any one of these is reason enough to walk away when you're sourcing for resale. The whole point of vetting is that a lost marketplace account costs far more than a slightly higher wholesale price.
Frequently Asked Questions
What should I look for in a wholesale supplier?
How do I verify a wholesale supplier is legitimate?
Why does supplier documentation matter so much for Amazon and Walmart sellers?
What are red flags when choosing a wholesale supplier?
Is a cheaper wholesale supplier always better?
Keep reading
Wholesale Supplier Documentation Guide
Exactly what documentation to request so you pass marketplace brand gating.
Best Wholesale Suppliers for Amazon FBA
Vetted brand-direct suppliers with the authorization marketplace sellers need.
Wholesale vs Distribution
How the source type affects authorization and documentation.
Skip the Vetting Guesswork
Catalist connects you to pre-vetted, brand-authorized suppliers with enterprise-grade documentation for every order — and no minimums.
Apply to Join