The Clock You Can't Stop: Limitation Periods for Claims Against Chinese Suppliers

Buyers who lose claims against Chinese suppliers rarely lose because the facts were bad. They lose because two years passed quietly while they hoped the supplier would come good, and by the time they picked up the phone, the notice windows had closed or the limitation clock had nearly run. Limitation periods are the least dramatic part of Chinese commercial law and the part that decides the most outcomes. This article covers every clock that governs a claim against a supplier: the general three-year period, the parallel quality-notice clocks, the one-year maritime window, and — the good news — the levers that stop and restart them.

1. The Default: Three Years and a Twenty-Year Cap

The baseline is Article 188 of the PRC Civil Code: the general limitation period is three years, running from the date the right-holder knew or should have known both of the harm and of who the obligor is. For an unpaid invoice, the clock starts when payment fell due. For a quality loss, it starts when you discovered — or should have discovered — the problem, which is rarely the delivery date.

Above the three-year clock sits a hard ceiling: the twenty-year maximum, measured from the date of the harm itself. No matter how many times the clock is interrupted, the twenty-year cap does not move (courts may grant an extension in genuinely special circumstances — treat it as fixed for planning purposes).

The "should have known" language is where cases are won and lost. A buyer who received defective goods in March but only tested them in September will be told the clock started in March, when a reasonable inspection would have caught the problem. Your inspection discipline sets your start dates — which is one more reason the quality-notice machinery in the next section matters.

2. What Stops and Restarts the Clock

Article 195 of the PRC Civil Code lists what interrupts the limitation period and restarts it fresh: the right-holder demanding performance, the obligor agreeing to perform, and filing suit or arbitration. Each interruption starts a new three-year run.

Two of these levers matter enormously for foreign buyers and are almost never used deliberately:

• A written demand for performance restarts the three years. This is the quiet second function of a demand letter — separate from its negotiation value, it keeps a claim alive. A properly issued, properly delivered demand resets the clock and gives you three more years. When lawyer letters actually work.
• The supplier's acknowledgment restarts it too. A written confirmation that the money is owed — an email conceding the balance, a signed repayment plan, even a partial payment on a clearly identified debt — counts as the obligor agreeing to perform, and the three years run again from that point.

The catch with both levers is evidence. A demand nobody can prove never happened. Chat screenshots alone are fragile: authentication fights are common in Chinese courts, and a limitation argument is exactly where a supplier will raise them. A demand letter sent by a lawyer, delivered in a way you can prove — and the acknowledgment captured in a form that survives court scrutiny — do the job. On making chat records court-ready: chat evidence in Chinese courts.

3. Quality Claims Run on Their Own Clocks

Here is the trap that catches even buyers who know about the three-year rule: quality claims are governed by a separate, shorter, parallel set of deadlines under Article 621 of the PRC Civil Code.

• If the contract sets an inspection period, notice of non-conformity must be given within it. Miss it, and the goods are generally deemed conforming.
• If no inspection period was agreed, notice must come within a reasonable period after discovering — or when you should have discovered — the defect, and in any event at the latest within two years of receipt.
• If a quality guarantee period applies, that period governs instead.

The two clocks run in parallel, and the shorter one bites first: a buyer can still be inside the three-year limitation period yet lose the quality claim entirely because the notice window passed. The notice clock is a condition of the claim; the limitation clock is the outer frame.

One provision works in the buyer's favor. Article 621's third paragraph closes the gates against the seller who knew: where the seller knew or should have known of the defect, the notice deadlines do not protect it. The deadlines protect honest sellers, not knowing ones — which is why, in fraud-flavored quality disputes, the notice argument often collapses once the supplier's knowledge is exposed.

4. Maritime Claims: A Shorter Clock

If your dispute touches the shipping leg rather than the factory, the timeline changes shape entirely. Cargo claims against sea carriers are generally subject to a one-year limitation period under the PRC Maritime Code (revised in 2025 — the mechanics were reworked, but the one-year principle for cargo claims survives), typically running from delivery or from when delivery should have occurred. The revised framework also adjusts the details around it; treat every maritime deadline as urgent and verify the current rules before relying on anything general.

Cargo damage that is visible at discharge carries its own immediate notice obligations — survey appointments, notices of loss, letters of protest — and the file that supports the eventual claim is built in the first days, not the first year. The first 48 hours after damaged cargo arrive.

The practical rule: if damage may have occurred on the water, your clock may be a quarter of what you think it is, and it is running while you negotiate with the factory about whose fault it was.

5. Can the Contract Change the Clock?

Partly, but not absolutely. Clauses that purport to shorten limitation periods get scrutinized: an outright exclusion, or an absurdly short window, is likely to be struck down as abusive, while a reasonably shortened window that leaves the buyer a fair chance to inspect has a better chance of standing. Treat any supplier-drafted "claims must be made within seven days of receipt or are deemed waived" clause as a live issue, not boilerplate — it interacts with the Article 621 notice regime and with judicial scrutiny of one-sided standard terms.

The safe posture: negotiate notice windows you can actually meet, document your inspection process so the windows you agreed are workable, and never build a claim strategy on the assumption that a statutory clock was validly waived. The contract can adjust the frame; the courts guard the floor.

6. Deposits, Tooling, NNN — the Same Base Clock

The three-year period is general-purpose, so most supplier claims share it. What differs is the start date — and the start date is where the fights happen:

• Deposit refunds. The clock starts when the refund fell due — typically on termination or failed performance — not when the deposit was paid. The substantive rules on deposits: how Chinese deposit rules work.
• Tooling claims. The clock starts when return of the tooling was refused or became impossible, which may be months after the last shipment. mold ownership and return: tooling ownership in China contracts.
• NNN breaches. Confidentiality, non-use and non-circumvention claims start when you learned of the breach — and discovery often comes late, which is exactly why the twenty-year cap matters more in NNN disputes than anywhere else. Date-stamped evidence of the disclosure is the whole case.

In each category, the same two levers from Section 2 — a proven written demand and an acknowledgment of the obligation — restart the same three-year run.

7. The Timeline Table

Event	When the 3-year clock starts	What stops/restarts it	Evidence to keep
Unpaid balance / invoice	Date payment fell due	Written demand; acknowledgment of debt; suit or arbitration	Contract, PI, invoice, bank records, your payment reminders
Hidden quality defect	Discovery — or when you should have discovered it	Same levers; note the separate notice clock may bite first	Inspection reports, photos, dated notices, third-party tests
Deposit not refunded	Date refund fell due (termination/failed performance)	Written demand; acknowledgment; suit	Contract, deposit receipt, termination notice
Tooling not returned	Refusal to return, or impossibility	Written demand; acknowledgment; suit	Tooling schedule, payment proofs, handover records
Cargo damaged in transit	Generally delivery date — under the one-year maritime rule	Within the maritime framework; treat as urgent	B/L, survey report, discharge notices, letters of protest
NNN breach	Date you learned of the breach	Written demand; acknowledgment; suit	NNN agreement, dated evidence of disclosure or diversion

8. If Your Clock Is Already Old

Old is not automatically dead — but "old and undocumented" usually is. If your claim is more than a year old, do the following this week, in this order:

1. Get a lawyer's written demand out, delivered provably. This restarts the three years, manufactures the evidence that it restarted, and opens the negotiation channel in one move. If the supplier responds at all, the response itself may contain an acknowledgment.
2. Ask for an acknowledgment of the debt. A signed confirmation that the money is owed — or even a well-captured email conceding the balance — restarts the clock. Do not treat casual chat messages as sufficient; capture them properly or get it in writing.
3. If they will settle but not pay now: a settlement agreement with a payment plan that re-acknowledges the debt, with each missed installment giving you a fresh starting point, is a claim-preservation tool as much as a compromise.
4. If the claim touches the shipping leg, treat it as urgent regardless of everything above. The one-year maritime window does not negotiate, and the notice mechanics attached to it run in days.

And one thing not to do: do not keep "sending chats" as your demand strategy. If the demand cannot be proven, it did not restart anything — and the three years you think you have may have expired months ago.

This article is general information, not legal advice, and does not create an attorney–client relationship. Limitation periods summarized here reflect the Civil Code and related statutes in force; the exact calculation always depends on the facts. Nothing here is a guarantee of results.