Chinese Supplier Contracts: 8 Mistakes to Fix Before You Pay
By Hasan Olwan, in Yiwu since 2009 · Last updated: November 3, 2026
The short answer: most problems with Chinese supplier contracts come from missing details, not from having no contract. Before you pay, write down who is legally responsible, which specs count, what proves each payment is due, what happens if goods fail inspection, and where delivery happens. Do it while you can still negotiate.
Here is a common example. You agree a price, you get a stamped invoice, and production finishes. Then you learn that “same as sample” meant the look to the supplier, while you meant the material, finish and packaging too. If the balance is due already, that argument gets hard.
This guide covers the 8 mistakes to fix first, then gives you a checklist to run before you sign.
This is practical guidance, not legal advice. For a large or complex contract, ask a lawyer who knows the governing law you plan to use.
1. Signing with a company you didn't check
You might negotiate with a trade name, sign with a trading company, pay a third company, and have a factory you never met make the goods. That doesn’t prove fraud, but you need to know who promised what.
The law firm Harris Sliwoski makes the point clearly in its guide to international business disputes: related companies are not interchangeable, and suing the wrong one is an expensive mistake.
Before you sign, confirm:
- The company’s legal Chinese name and registration details
- Its registered address, and the production site if it’s different
- The name and authority of the person signing
- The bank account holder, and how it connects to the contract party
- What the trading company is responsible for, if one is involved
Our guide on how to verify a Chinese supplier walks through these checks. Can’t read the records? We run a supplier legal check for you.
2. Leaving specs and samples out of the agreement
“Excellent quality” and “same as the picture” give an inspector nothing to measure. Turn what you expect into things someone can check, then attach that list to the order.
| Vague wording | What to write instead |
|---|---|
| Same material | Material name or grade, and how it will be checked |
| Same size | Dimensions and the agreed tolerance |
| Same color | A color reference or approved sample, and how to compare |
| Strong packaging | Carton type, inner protection and any drop test |
| Works well | The function test and what counts as a pass |
Give the approved sample a reference tied to the order, with its date, photos and measurements. Say what it represents: the look only, or the material, finish, function and packaging too. If the sample and the drawing disagree, say which one wins.
3. Tying payment to a date instead of proof
“Balance when production is finished” leaves the main question open. How do you prove it’s finished? Does it mean the full quantity, a passed inspection, or ready documents?
No single deposit percentage fits every supplier. What matters is agreeing what each payment is for and what evidence makes it due.
| Stage | What to agree |
|---|---|
| Start of work | Approved sample, specs and production start terms |
| Agreed production stage | The proof of progress named in the contract |
| Before the balance | Inspection result, fixes and required documents |
| At or after shipment | The named document, if your terms require one |
Also write down the currency, what the price includes, and who pays for tooling, printing and testing. Say how extra costs get approved, so a message saying “materials went up” doesn’t become a price change by itself. For the payment side, read how to pay Chinese suppliers.
4. Requiring inspection but not saying what happens if it fails
A line saying “buyer may inspect” doesn’t settle much. You can agree on an inspection and still argue about the standard, the re-check, or whether the balance is due.
Write these into the contract file:
- Who inspects, or how the inspector is chosen
- When it happens, and access to the goods
- The specs, tests and sampling plan
- How defects are defined, and the accepted limits
- How fixes and re-inspection work, and who pays for them
- How the result connects to the balance and the release of goods
If you accept a difference in exchange for a discount, name the units, the defect and the settlement. Our quality inspection checklist helps you build the instructions, and our inspectors can do the visit.
5. Vague delivery dates and shipping terms
“Delivery within the agreed time” isn’t enough. Does the clock start after the deposit, the sample approval, or receipt of your print files? Does it stop when the factory is ready, when the carrier collects, or on arrival?
Separate the dates you need:
- Sample and spec approval
- Production start and ready for inspection
- Fixes finished and goods packed
- Delivery at the point named in the contract
- Estimated departure and arrival, depending on who arranges transport
State the Incoterm with the exact place and the version, for example “FOB Ningbo, Incoterms 2020”, not just “FOB”. The ICC Incoterms rules split costs, risks and duties tied to delivery. They don’t cover payment, quality, or who owns the goods, so those still need their own terms. Our FOB vs CIF vs DDP guide explains the common ones.
6. No plan for defects, shortages and delays
“The supplier is responsible for quality” tells nobody what to do. Agree the steps for when things go wrong.
| Problem | What to agree |
|---|---|
| Short quantity | How it’s proven, how it’s made up, and who pays to send it |
| Wrong material or model | What counts as not conforming, and the remedies |
| Damage from poor packaging | The packaging spec, the evidence and who is responsible |
| Late delivery | The binding date, the notice and the remedy |
| Defect found after arrival | How to report it, what evidence, and any warranty |
Say how notices are sent and who receives them. Don’t assume returning the goods is always the answer, or that the supplier will cover all shipping, sorting and storage. Negotiate these terms directly. A penalty in the contract also doesn’t guarantee you can collect it, so have it reviewed.
7. Letting changes, molds and designs go unmanaged
If you approve a material change in chat and the old spec stays in the file, you’ve created a conflict in your own paperwork. Agree how changes get approved: what changed, how it affects price and timing, and who may sign off.
For custom products, cover the points that apply:
- Who owns the mold, how it’s identified and where it’s kept
- Limits on its use, plus maintenance and costs
- How to get it back or move it
- Use of your design, brand and technical files
- Subcontracting, or moving production to another site
- What happens to extra or rejected goods
Paying for a mold doesn’t settle every right to it. If your business depends on one, get these clauses reviewed.
8. Copying language and dispute clauses from another contract
A two-language contract helps both sides understand it, but only if the two versions match. Check the sensitive terms side by side: specs, payment, exclusions, compensation and jurisdiction. Then decide which language controls. Don’t leave that to chance.
Governing law and dispute forum are separate questions. The first decides which rules apply. The second decides who hears the case. Ask your lawyer:
- Who is bound by the clause?
- Where are the other side’s assets?
- Does this route make sense for the size of the deal?
- What language is used, and what will translation cost?
- How could a win actually be enforced?
Harris Sliwoski’s advice is to find out where the other company’s money and assets are before you file, because a strong claim doesn’t help if no court can reach them.
Checklist before you sign and pay
- Contract party is named and checked
- The link between factory, trading company and bank account holder is documented
- Specs, sample and attachments are tied to this order
- It’s clear which document wins if two disagree
- Price, currency and what’s included are written down
- Payment stages and their proof are agreed
- Inspection standard and failure steps are agreed
- Delivery point, dates and Incoterm are set
- Defects, changes and molds are covered where they apply
- Language and dispute route have been reviewed
- Contracts, messages and transfer records are saved in one file
If a dispute starts, keep the original files, attachments and messages, along with samples and packaging from the problem goods. Don’t hold back a payment or end the relationship before getting advice, because either step can trigger counterclaims or cause a supplier to hold your goods or tooling.
Frequently asked questions
Is a proforma invoice enough instead of a contract?
It depends on its terms, how both sides accepted it, and the law that applies. In practice, don’t leave specs, inspection, remedies and disputes outside a clear order file.
Does the contract have to be in Chinese?
Chinese isn’t a general condition for every contract to be valid. Still, decide how the language versions relate, and don’t rely on machine translation for a sensitive document.
Is an unstamped contract automatically invalid?
No. The contract rules in China’s Civil Code cover signing, stamping and thumbprints, and some cases of accepted performance. You still need to check who the party is and who had authority to approve.
Do emails and WeChat messages count as proof?
They can, depending on what they say and the rules that apply. The Civil Code treats electronic data that meets its conditions as writing. Keep the originals, attachments and dates.
Do FOB or CIF settle payment, quality and ownership?
No. Incoterms deal with delivery, costs and risk. Payment, quality, ownership, governing law and disputes need their own terms.
Summary
Check these 8 things before you pay:
- The company you sign with is the one you checked.
- Specs and samples are attached to the order.
- Each payment is tied to proof, not a date.
- You know what happens if inspection fails.
- Delivery dates and the Incoterm are exact.
- Defects and delays have agreed remedies.
- Changes and molds have clear rules.
- Language and disputes were chosen on purpose.
We check suppliers and inspect goods in China before you pay the balance, for small orders and full containers. The legal wording stays with your lawyer.