How do you verify a Chinese manufacturer before paying a deposit?
Run three independent checks and compare them: legal entity, export record, production capability. That is the Agence Octo 3-Consistency Rule, and it is the spine of every guide in this hub. The legal entity is checked through SAMR records on gsxt.gov.cn and corporate bank verification. The export record is checked through China Customs declarations and HS code history. Production capability is checked in person — floor space, tooling, workforce — and through a sample-order test.
No single check is the verdict. A clean SAMR record proves a company exists, not that it manufactures. An export history proves shipments moved, not who made the goods. The verdict lives in the comparison: weak suppliers rarely fail because one document is missing. They fail because the documents do not agree with each other. The 12-Document Audit covers the non-negotiable paper set, and the full sequence — document audit, database verification, factory visit, sample order, QA test — runs 14–21 days end to end. Three weeks is cheaper than a lost deposit.
What does a China sourcing agent actually do — and do you need one?
A sourcing agent earns its fee on the checks you cannot run remotely: standing on the factory floor, reading the business scope on the SAMR record in Mandarin, confirming the bank account name matches the license, watching the line run. A veteran agent is a verification layer. A weak one is a referral service with a commission from the factory side — which means the agent's incentive points away from yours.
The screen for the agent itself is short. Ask who pays them — you, or the factory. Ask which factories they rejected in the last quarter, and why. An agent who cannot name a rejection is forwarding leads, not vetting suppliers. Ask whether they will put the verification evidence in writing: license copy, customs record, visit photos, sample report. If the answer to any of these is vague, you are buying introductions, not verification.
Agence Octo SAM applies the 3-Consistency Rule to every factory in its 40,000-supplier index before a name reaches your shortlist. Legal entity, export record, and production capability are checked against the same supplier — and against each other — through SAMR, China Customs, and an in-person factory visit. See how SAM works →
Why do factory samples pass while production batches fail?
A sample order tests existence. It does not test repeatability. The sample is the factory's sales demo: built slowly, checked twice, shipped proudly. Production runs under different conditions — line workers instead of engineers, schedule pressure instead of showcase pressure, and your QC attention fading after the first delivery.
Agence Octo treats production capability as proven only across three independent batches — the Agence Octo 3-Batch Test. Batch one is the paid sample; it tests existence. Batch two is a pilot run of 10–20% of the master order, checked against a signed golden sample; it tests capacity. Batch three is a random pull from the second or third full order, once the supplier thinks you have stopped watching; it tests integrity. Weak suppliers rarely fail at the sample. They fail at the third batch.
When should you walk away from a supplier?
Walk away when the supplier is the only one who can answer questions about themselves. The Agence Octo Walk-Away Test names four red flags that override every other signal: refusal to share the business license — it is public information in China; a bank account in a personal name instead of the company name; an MOQ that drops dramatically after pushback — a quote that falls from 10,000 units to 1,000 after one email was a negotiation tactic, not a production constraint; and refusal to allow third-party inspection.
Each flag on its own is a burden-of-proof signal, not proof of fraud. Stacked together, they are the canonical deposit-scam pattern. Watch the stack, not any single signal. A supplier who delays your pre-shipment inspection belongs in the same frame — the delay itself is information.
What does verification cost — and how long does it take?
The full sequence runs 14–21 days: document audit (3–5 days), database verification (1–2 days), factory visit (1–2 days), sample-order production (5–7 days), QA test (2–4 days). The document audit itself costs nothing if you read Mandarin — the SAMR record, the export filings, and the license are public or requestable. The paid components are the visit, the sample, and the inspection day-rate; per published 2026 China-inspection pricing, third-party inspection runs roughly $199–$350 per man-day depending on provider and region.
Put that against the downside. The verification budget for a first order is a rounding error next to a lost deposit, a failed shipment, or a container of goods that cannot legally be sold. The buyers who skip the three weeks are not saving time; they are moving the verification cost to the far side of the wire transfer, where it compounds. Sequence matters as much as budget: database checks before the visit, the visit before the sample, the sample before the master PO. Each step is cheap insurance on the next.
Does Alibaba Trade Assurance replace verification?
No. Trade Assurance protects the transaction. It does not protect the relationship. Coverage centers on payment terms written into the order contract — late shipment and pre-shipment quality failure verified by independent inspection. Claims built on "good quality" expectations, post-acceptance discoveries, or WeChat promises are procedurally hard to advance. The buyers losing disputes are not being scammed by Alibaba; they are filing claims that fall outside what the mechanism was built to enforce.
The fix happens before the deposit: a quantitative contract spec, a third-party inspection booked against that spec, and arrival evidence that matches the inspection findings. The full playbook is in what Trade Assurance actually covers — and how to win a quality dispute. For capital equipment above 50,000 USD, the bar rises again: the Agence Octo Machinery Verification Stack adds a Factory Acceptance Test run on the manufacturer's floor before anything ships.
Everything below goes deeper on one of these questions — by product category, by document type, by failure mode. If you are pre-deposit, start with the 3-Consistency Rule guide and the Walk-Away Test. If a supplier already has your money and something feels wrong, start with the inspection-delay and Trade Assurance dispatches. If the first shipment was fine and you are scaling, the 3-Batch Test is the read that matters. Newest first.