Conflicting Purchase Orders and Chinese Supplier Terms: Which Terms Apply?

1. Identify the deal and the governing framework

This article concerns business purchases of goods from mainland Chinese suppliers, including qualifying made-to-order supplies. Consumer purchases, public procurement, pure services and carriage contracts need separate analysis. The Civil Code discussion assumes PRC substantive law governs the relevant issue; CISG applicability requires its own assessment. An overseas buyer’s nationality, invoice currency or use of English does not decide governing law.

Collect four facts first: the exact parties and relevant places of business; the master agreement and sequence of delivered versions; payment, production, shipment and acceptance of goods; and the precise commercial difference. Matching order numbers do not establish matching legal terms.

For a potentially qualifying international sale, examine CISG Articles 1–6, current treaty status and declarations, and any effective exclusion. Do not assume a Chinese governing-law clause makes the CISG irrelevant. China’s Article 1(1)(b) reservation must be distinguished from its withdrawn written-form declaration. The current UN record matters more than an old template.

Under Article 4, the CISG generally addresses formation and sale obligations, but not the validity of the contract or individual provisions, or property effects. Incorporation of a liability limit and its substantive validity may therefore require different analyses. Articles 1 and 3 of the SPC’s treaty-and-usages interpretation, effective 1 January 2024, address treaty application and permitted contractual exclusion in foreign-related civil and commercial cases.

2. An acknowledgement can be a counter-offer

Where PRC domestic formation rules apply, Civil Code Articles 472 and 479–489 focus on content and assent. Article 488 treats material changes as a new offer, including changes to goods, quantity, quality, price, performance arrangements, liability and dispute resolution. An acknowledgement headed ‘accepted’ can still alter the bargain by replacing a firm delivery date, imposing a liability cap or changing the forum.

Article 489 treats non-material changes differently, subject to timely objection or an offer prohibiting any alteration. Do not classify every line of boilerplate as immaterial, or assume a universal seven-day objection window.

CISG Articles 18–19 similarly distinguish acceptance, material modifications and non-material discrepancies. Article 19 specifically identifies payment, quality, quantity, delivery, liability and dispute-settlement terms as material. For non-material discrepancies, the offeror must consider the requirement to object without undue delay. Articles 8–9 also require attention to negotiations, established practices, usages and subsequent conduct. Neither an automatic last-shot rule nor automatic cancellation of every conflicting clause is a safe universal conclusion.

3. Performance can establish a contract without settling every clause

Civil Code Article 469 recognises qualifying retrievable emails and data messages as writing. Article 490 provides for formation in specified circumstances when one party performs its main obligation and the other accepts it. Article 491 separately addresses agreed confirmation documents. Article 140 does not generally equate silence with consent: the relevant legal rule, agreement or established practice must be considered.

CISG Article 18 likewise says silence or inactivity alone is not acceptance, while conduct may indicate assent. Where permitted by the offer, established practices or usage, an act such as payment or dispatch may accept without separate notification.

Consequently, ‘we never signed’ is not a complete answer, and ‘they accepted the goods’ does not automatically prove acceptance of every liability or forum term. Identify the goods, quantity and price demonstrably agreed, and isolate disputed additions. SPC Contract General Provisions Interpretation Articles 1–3 direct attention to negotiations, performance and proven practices. Under PRC domestic law, Civil Code Articles 510–511 may fill unresolved content rather than importing whichever template a party prefers.

4. Test standard conditions in three stages

First ask whether a term was incorporated. Civil Code Article 496 requires reasonable attention to materially significant standard conditions and explanation on request. Failure causing the counterparty not to notice or understand such a condition can support a claim that it never became part of the contract. Under Interpretation Article 10, the provider bears the burden of showing the required attention or explanation; a checkbox or pop-up alone does not necessarily discharge that burden.

Second ask whether an incorporated term is valid. Article 497 addresses specified unfair allocations of responsibility and interference with the other party’s principal rights; Article 506 contains additional invalidity rules for particular exclusions. A commercial liability cap is not automatically invalid, but a signature does not cure every statutory defect.

Third address interpretation. Article 498 calls for ordinary understanding, interpretation against the provider where a standard term admits multiple meanings, and preference for a non-standard term where the two conflict. It is not a licence to replace a clear unfavourable bargain with a preferred one.

These controls are relevant to business-to-business terms, including an overseas buyer’s purchase conditions. Article 496 and Interpretation Article 9 focus on preparation for repeated use and lack of negotiation, not simply the document’s label. A statement that everything was negotiated, or that this form was used only once, is not conclusive. Preserve actual redlines and negotiations. A website reference without the applicable version creates a proof problem, but not every linked set of conditions is automatically ineffective.

5. Treat later invoices as a possible amendment, not a reset

If the contract already exists, ask whether later invoice, delivery-note or website conditions changed it by agreement. Civil Code Articles 543–544 require agreement for modification and presume no modification where its content is unclear. Interpretation Article 14 also requires analysis of the sequence and actual performance of multiple genuine contracts.

CISG Article 29 permits agreed modification and addresses a written contract requiring written amendments, including the qualification where conduct and reliance preclude a party from invoking that requirement. Neither ‘emails can never amend the deal’ nor ‘paying the new invoice accepts all new terms’ is a reliable shortcut. Examine authority, the scope of assent, form requirements and why payment was made.

Before the next order, agree a dated document schedule and priority rule: master agreement, negotiated deviations, order, technical schedules and standard conditions. Identify who may approve exceptions and how. This is a drafting safeguard, not a statutory entitlement for the buyer’s purchase order to rank first.

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6. Build a six-column conflict register

Use one row for each disputed condition. This register exposes missing evidence; it does not itself decide enforceability.

• Issue: delivery date, inspection window, liability cap, payment condition or forum.
• Buyer version: exact wording, document, page, attachment and version date.
• Supplier version: competing wording and complete version, not an isolated screenshot.
• Delivery and response: full email headers, attachments, access records, acknowledgement, objection and negotiated revisions.
• Conduct and reliance: payments, production instructions, shipment and acceptance, with dates and the instructions relied upon.
• Provisional position: agreed, requiring clarification or disputed; record the next deadline and responsible person.

7. Preserve the claim while resolving the paperwork

Identify the precise discrepancy in writing and ask the supplier to identify its asserted contractual version and basis. Where feasible, agree how undisputed performance will continue while the difference is resolved. A reservation records your position but cannot unilaterally undo an effective acceptance. Stopping all payment, production or delivery without analysing the existing obligations can create a new breach dispute.

A debate over conditions does not suspend inspection and defect notices. Where PRC law applies, Articles 621–623 address agreed or reasonable notification periods, overly short inspection periods and presumptions arising from signed delivery records. Under the CISG, Articles 38–40 require prompt examination and specific notice within the applicable period, with a seller-knowledge exception. Do not wait for the terms dispute to end before reporting defective goods.

Civil Code Article 594 provides a four-year limitation period for litigation or arbitration over international sale-of-goods and technology import/export contracts where the relevant Chinese rule applies. Not every supplier relationship falls within it; accrual and any suspension or interruption require separate assessment. Formation objections, inspection notices, termination and procedural deadlines are different clocks. An enquiry does not stop them.

8. Choose a remedy only after checking agreement and assets

Before litigation or arbitration, verify assent to the dispute clause, the applicable framework and the competent forum. Agreement on goods and price does not by itself resolve a contested agreement to arbitrate. Keep the exact respondent’s identity, the version history, performance and loss evidence, and reliable Chinese asset leads together.

Expect arguments that a master agreement already fixed priority, earlier dealings established the conditions, a representative agreed a change, or your payment and performance followed a revised offer. Other failures include missing attachments, an unrecorded website revision, inconsistent bilingual wording, unsigned deviations and a reply that merely acknowledges receipt rather than agreeing terms.

Seek a focused review promptly where shipment or an objection window is imminent, a cancellation or payment hold is proposed, or proceedings have already started. A favourable contract interpretation is not a guarantee of recoverable assets or payment.