Supplier due diligence: real manufacturer or middleman?
Half the “factories” you find online are trading companies. That isn’t a scam — but you should know which one you’re dealing with, and price accordingly. Here’s how to check, layer by layer.
Direct answer: The most useful check is free. Ask for the business licence, take the 18-character Unified Social Credit Code from it, and look the company up on China’s National Enterprise Credit Information Publicity System (gsxt.gov.cn). It tells you whether the business is real and in good standing, whether it’s a manufacturer or a trader, and whether its registered scope even covers what you’re buying — before you’ve spent a cent.
A middleman isn’t a scam — but know which one you’ve got
Many suppliers that present as “factories” are trading companies: they buy from real makers and resell with a margin and a layer of communication. That’s a legitimate service — sometimes worth paying for. The problem is narrower: paying factory-direct prices for a middleman, or having nobody in the chain who actually controls quality. Due diligence isn’t about catching crooks. It’s about knowing exactly who you’re dealing with, and pricing the relationship for what it really is.
Layer 1 — Verify the legal entity (free, do it first)
- Ask for the business licence (营业执照). It shows the registered company name, the Unified Social Credit Code (18 characters), registered capital, establishment date, legal representative, and the business scope.
- Look the code up on the National Enterprise Credit Information Publicity System (国家企业信用信息公示系统, gsxt.gov.cn), the official registry run by China’s market regulator. Confirm the company exists and is “in business” (在业 / 存续), that its registered capital and age match the story you’ve been told, and that it carries no abnormal-operations listing or serious violations.
- Match the names. The company you’re chatting with, the licence, the bank account and the invoice must all be the same legal entity. A mismatch anywhere is the single strongest warning sign.
Layer 2 — Maker or middleman? The tells
- Business scope wording. A manufacturer’s scope includes 生产 / 制造 (production / manufacturing) of your product category. A trader’s reads 销售 / 贸易 / 批发 (sales / trade / wholesale). If the scope doesn’t mention making your product, they probably don’t.
- Invoicing and export. Can they issue a VAT special invoice (增值税专用发票), and — for export — are they the manufacturer of record with their own export rights? Traders often invoice through a third party.
- Address and site. A registered office in a city-centre tower is not a factory. Ask for the factory address and cross-check it against a map, a utility bill, and a live walk-through.
- Ask maker-only questions. Tooling and mould ownership, minimum-order logic, line capacity, cycle time, defect rate, which parts are made in-house versus bought in. A real maker answers specifically; a reseller goes vague or “needs to check with the factory”.
Layer 3 — Prove capability and quality
- See the place. A live video tour at minimum; better, an in-person and ideally unannounced visit. Photos prove nothing.
- Verify certifications at the source. ISO 9001 and product marks (CE, UL, RoHS, FDA and the like) — check the certificate number with the issuing body, not the PDF they email you. Fake certificates are common.
- Sample properly. Agree a “golden sample” you both sign off, then require a pre-production sample from the actual line — not a hand-built showpiece.
- Use a third-party inspector. Independent firms (SGS, Bureau Veritas, Intertek, TÜV and others) run during-production and pre-shipment inspections to an agreed standard — commonly an AQL sampling level. The fee is small next to a bad container.
Layer 4 — Commercial hygiene
Pay the company, not a person. Wire only to the corporate bank account in the exact name on the business licence. A request to pay a personal account, an unrelated Hong Kong company, or any third party whose name doesn’t match is a stop sign — it’s the classic setup for both fraud and tax evasion.
- Contract the details. Written specs and tolerances; the inspection standard and who pays for re-inspection; payment tied to milestones; tooling and IP ownership; and remedies for defects or late delivery.
- Stage your payments. A deposit, then the balance against passed inspection — never 100% up front. Milestones keep the leverage on your side until the goods are right.
Red-flag checklist
| Signal | What it usually means |
|---|---|
| Bank account name ≠ business-licence name | Fraud / tax-evasion risk — stop |
| Wants 100% payment up front | You lose all leverage over quality |
| Scope says trade/sales, but priced as factory-direct | A middleman margin you can’t see |
| “Certificate” is a PDF; the number won’t verify | Possibly fake certification |
| Won’t allow a video tour or third-party inspection | Not the real maker, or something to hide |
| Price far below everyone else | Substituted materials, or a quote that will change later |
Quick FAQ
Is a trading company always worse than a factory?
No. A good trading company or agent can consolidate suppliers, manage quality and work in your language — genuinely worth paying for. You just shouldn’t pay factory-direct prices for it, or assume it controls quality unless it demonstrably does.
Can I vet a supplier without going to China?
Largely, yes — the registry lookup, certificate verification and a live video tour get you a long way, and a local third-party inspector can be your eyes for a specific production run.
What’s the cheapest high-value check?
The free registry lookup on gsxt.gov.cn, plus matching every name — company, factory, bank account and invoice. Together they catch most of the worst cases before you’ve spent anything.
Want us to be your eyes on the ground?
We verify the entity, visit the factory, interpret and inspect — so you can buy from China without flying over or reading Mandarin.
Sources
This guide is general information, not legal advice. Requirements vary by city, document and personal circumstances — confirm your specific case before acting. Last checked 20 July 2026.
