Defective Goods from a Chinese Supplier: How Should an Overseas Buyer Prove the Claim?

When does this guide apply?

This guide addresses commercial purchases from Chinese suppliers where an overseas buyer alleges that goods do not meet agreed performance, material, dimensions, appearance, quantity, packaging or fitness requirements. Pure services, carrier liability, personal injury and consumer product liability may engage different rules and should not be forced into the same analysis.

Begin with the governing-law and dispute-resolution clauses, the parties’ places of business, any CISG exclusion, the inspection clause and the warranty. China and many major trading states are CISG parties, but applicability still depends on the parties’ places of business, private international law, contract wording and relevant declarations. Do not assume that every purchase from China is governed by the same regime.

Preserve the facts in six steps before choosing a remedy

This sequence is designed to prevent the sample from being altered, a notice from becoming late or a loss from becoming untraceable. A contractual or statutory deadline always takes priority; the steps below are not a legal grace period.

• Freeze the condition: pause repair, rework, mixing, return or destruction that would change the alleged defect; record goods, packaging, seals, serial numbers, batches, quantities, location and storage conditions.
• Identify the benchmark: place the purchase order, specifications, drawings, approved sample, testing protocol, labelling and packaging requirements side by side.
• Map every clock: list contractual inspection and warranty periods, CISG or PRC-law examination and notice rules, litigation or arbitration limitation periods, and any platform or insurance deadline.
• Design the test: define the disputed technical question before selecting a representative sampling method, standard, laboratory and retention protocol; invite or notify the supplier where practicable.
• Give a specific notice: identify batches, quantities, symptoms, test basis, protective measures and the remedy sought, and preserve delivery and response records.
• Quantify loss separately: prove the price, sorting or rework, storage, substitute purchase, return or disposal, customer claims and operational impact, together with reasonable mitigation.

Which standard determines whether the goods conform?

CISG Article 35 requires conformity in quantity, quality, description and packaging. Unless the parties agree otherwise, it may also require fitness for ordinary use, fitness for a particular purpose disclosed to the seller where reliance was reasonable, conformity with a sample or model, and usual or adequate packaging. Article 36 can capture a defect that existed when risk passed but became apparent later.

The PRC Civil Code likewise requires a seller to deliver goods meeting the applicable quality requirements. In practice, work through the signed contract, later confirmations, samples and drawings, the parties’ course of dealing and any mandatory standard. An internal buyer specification that was never incorporated into the transaction does not automatically become the supplier’s obligation.

A supplier may argue that the defect arose from the buyer’s design, materials or manufacturing instructions, or from carriage, storage, installation or use after delivery. Testing should therefore address what the defect is, when it existed and what caused it—not merely state that the sample passed or failed.

See the scope of a China supplier claim assessment →

Do not confuse examination, notice, warranty and limitation periods

Where PRC law applies, Civil Code Articles 620–624 require examination within an agreed period or, if none is agreed, a timely examination. The buyer must notify non-conformity within the agreed period or a reasonable period after it discovered or ought to have discovered the problem. Without an agreed inspection period, failure to notify within two years of receipt can generally result in deemed conformity, while an applicable quality-guarantee period takes priority. A seller that knew or should have known of the non-conformity cannot rely on the relevant notice rule.

A signed delivery or confirmation document stating quantity, model and specifications generally creates only initial evidence as to quantity and apparent defects under Article 623, and may be rebutted. It does not automatically eliminate a latent performance defect, but the buyer still needs to explain when and how the issue was discovered and why it was not reasonably discoverable earlier.

CISG Article 38 requires examination within as short a period as practicable, with adjustments for carriage, redirection or redispatch. Article 39 requires a notice specifying the nature of the non-conformity within a reasonable time and normally no later than two years after actual receipt unless inconsistent with a contractual guarantee. Article 40 restricts a seller that knew or could not have been unaware of the defect and failed to disclose it from relying on those notice provisions. The two-year rule is an outside notice period, not a universal limitation period.

If PRC law governs, claims arising from an international sale of goods or a technology import/export contract generally have a four-year limitation period. Accrual, interruption and the separate effect of contractual periods still require case-specific analysis. Do not wait for a two- or four-year date: a contractual inspection period measured in days or weeks may matter much earlier.

Build the claim file by evidential purpose

Evidence is useful only if it answers a defined question and remains traceable. A large folder of unsorted photographs, messages and reports often leaves the core gaps—batch, timing, benchmark and loss—unresolved.

• Contractual benchmark: signed contract, purchase orders, specifications, drawings, sample approvals, quality agreement, email variations, applicable standards and packaging or labelling requirements.
• Identity and traceability: bill of lading, packing list, container and seal numbers, SKU, serial and batch numbers, receiving record, warehouse map and a table linking the inspected sample to the shipment.
• Condition and discovery: continuous unboxing video, native time-stamped photographs, inspection sheets, storage temperature or humidity, installation and use logs, and original files with metadata.
• Technical defect and causation: agreed method, sampling plan, laboratory qualifications, full report, raw data, control samples, sealed retained samples and a precise expert question.
• Timely and specific notice: communication identifying the batch, quantity, symptoms, applicable standard, preliminary test, protective action and proposed remedy, with proof of delivery and response.
• Loss and mitigation: payment, residual value, sorting, rework, storage, substitute purchase, return, disposal, downstream claim and insurance records, with causation, foreseeability and mitigation identified for each item.

A third-party report helps, but it does not decide the case

A buyer-commissioned inspection report may be evidence, but the supplier can challenge whether the sample represented the batch, whether it was substituted or altered, whether the test standard formed part of the contract, whether carriage or storage changed the goods, and whether the laboratory was competent. Notice of sampling, a reproducible random or agreed protocol, and sealed buyer, seller and reserve samples are usually more persuasive than a stand-alone conclusion obtained later.

The Supreme People’s Court’s guidance on court-commissioned appraisal stresses that a court should first decide whether the disputed fact genuinely requires specialist appraisal and examine the materials and reliability of the method. A private pre-action test is not automatically a judicial appraisal. If a technical issue remains disputed in proceedings, define the specialist question narrowly and submit suitable, traceable material in time.

Do not return or destroy all goods before completing the record. If safety, regulatory or storage concerns require urgent disposal, record the reason, notify the supplier, take representative samples with independent witnessing, and retain evidence of quantity, residual value and cost.

Match the remedy to the severity of the defect and the commercial objective

Potential outcomes include repair, replacement, re-delivery, price reduction, return and refund, avoidance or termination, and damages. They cannot all be obtained inconsistently for the same loss. CISG Articles 45–48 provide routes to performance, repair, substitute goods and damages in the relevant circumstances, while a seller may have an opportunity to cure without unreasonable delay or inconvenience. Avoidance and substitute delivery generally require a higher threshold and timely notice.

CISG Articles 74–77 link damages to actual loss and lost profit, foreseeability at contract formation and mitigation; substitute-transaction and current-price measures apply after avoidance in defined circumstances. PRC-law damages likewise require proof of loss, causation, foreseeability and mitigation. Negotiations should therefore compare the minimum acceptable outcome, feasibility of continued supply, and assets available for recovery with the legal remedy.

A timed repair, replacement or instalment refund may be commercially sensible where the relationship remains useful, the problem is curable and assets are stable. If liability is denied, assets are moving or a deadline is approaching, assess a formal demand, litigation or arbitration, asset preservation and enforceable settlement terms in parallel. A refund promise is not the same as cleared funds.

Expected defences and common failure points

Common supplier defences include compliance with the approved sample or tolerance, a defect caused by buyer design or by carriage, storage, installation or misuse, unrepresentative sampling, an unagreed test standard, late or vague notice, acceptance through signing or continued use, mixed batches, and loss that was unforeseeable, duplicated or not mitigated.

Common buyer failures include testing only after repair or return, photographing selected defects without proving the wider batch, losing the link between sample and shipment, saying only that the quality was ‘bad’, treating a downstream deduction as automatically recoverable in full, or simultaneously demanding continued delivery and making statements that may be read as a complete termination.

Not every weakness defeats the claim, but each can increase factual uncertainty and expert cost. Organise the chronology and remedy before the first formal notice. If time is short, send a specific reservation-of-rights notice based on known facts rather than waiting silently for a final laboratory report.

When should an overseas buyer obtain China-law advice promptly?

Seek prompt advice if a contractual inspection period is expiring, goods will be repaired or destroyed, the supplier requests a final settlement document, multiple batches are affected, the supplier denies the contracting or payment entity, asset preservation in China may be needed, or a litigation or arbitration limitation issue may arise. Urgent legal deadlines take priority over the document sequence in this guide.

For an initial assessment, prepare the contract and purchase orders, a payment and delivery timeline, affected batches and quantities, existing photographs or reports, notices already sent, the commercial outcome sought and any known asset information. This allows counsel to separate facts requiring immediate preservation from evidence that can still be strengthened and claims suited to negotiation or proceedings.