Unsigned China Purchase Order: Can Emails and Payment Prove a Binding Sale?
A missing signed contract does not, by itself, establish that no sale was agreed. A purchase order, an email confirmation and subsequent payment or delivery may establish an agreement. They may also show that negotiations never reached acceptance, or that a different version was accepted. When a Chinese supplier denies an order after receiving money, the first task is to reconstruct what each party actually agreed and when.
This guide concerns commercial cross-border sales of goods involving mainland China. Establishing a contract, identifying the company bound by it and proving a right to repayment or damages are separate questions.
1. Identify the governing rules and any required form
Check the parties’ places of business, the transaction, any governing-law clause and any exclusion of the United Nations Convention on Contracts for the International Sale of Goods (CISG). Its application depends on its scope and relevant State declarations; the buyer’s nationality alone is not decisive. Mainland China’s declaration concerning Article 1(1)(b) requires attention, and Hong Kong has a different position on that declaration.
Where the CISG applies, Article 11 generally permits a sale to be concluded and proved without a prescribed written form. That does not override Article 12 where a relevant Article 96 declaration applies, or eliminate an agreed requirement for a signed confirmation. China withdrew its declaration concerning Article 11 in 2013, but the other party’s place of business and any applicable form rules still need checking. The UN depositary record should be checked for the relevant States and transaction date.
Under CISG Article 4, contract validity and the effect on ownership are generally outside its scope. A sales employee’s authority to bind a company also needs a separate assessment. A conclusion that a sale was formed therefore does not settle every enforceability issue.
2. Trace a sufficiently definite offer to an effective acceptance
Under Article 14, an offer to identified persons must indicate an intention to be bound if accepted and be sufficiently definite as to the goods, quantity and price, including a means of determining quantity and price. A price list, draft quotation or pro forma invoice is not automatically an offer or a completed contract; its wording and context matter.
Article 18 recognises acceptance by a statement or conduct indicating assent. Silence or inactivity alone is not acceptance. Ordinarily, an indication of assent must reach the offeror within the fixed or reasonable time. Article 18(3) allows acceptance by an act such as dispatch or payment without notice where the offer, established practices or usage authorises that method, and the act is timely. Article 23 links formation to the acceptance becoming effective.
Accordingly, “we have received your order” may acknowledge receipt without accepting it. A payment may be evidence of acceptance, but it must be linked to the relevant offer, parties and purpose. A supplier’s internal preparation is not automatically a communicated acceptance. Articles 8 and 9 require attention to the negotiations, established dealings, applicable usages and subsequent conduct. The official CISG text contains these formation rules.
3. Check whether the confirmation changed the order
Under Article 19, a reply presented as acceptance but containing modifications can instead be a counter-offer. Changes concerning price, payment, quality, quantity, place or time of delivery, liability or dispute settlement are treated as material. Non-material changes can form part of an acceptance unless the offeror objects without undue delay, subject to the provision’s conditions.
For example, if the buyer’s order requires shipment on 1 November but the supplier’s confirmation changes it to 1 December, the word “confirmed” does not prove acceptance of the original date. This is a hypothetical example, not a reported case. Check the next response and performance to determine whether the changed proposal was accepted.
Keep every attachment and linked set of standard terms as it existed at the time. A footer on a later invoice does not, merely by appearing there, prove that its terms were agreed. Conflicting standard terms, incorporation and any agreed document-priority clause require their own review; no universal “last email wins” rule should be assumed. Whether an arbitration or court clause is binding must also be assessed under the rules applicable to that clause.
4. If PRC domestic formation rules apply, distinguish email from formal execution
Article 469 of the PRC Civil Code recognises data messages, including email, as written form where their contents can be represented tangibly and retrieved for later reference. This does not automatically authenticate the sender, prove authority or establish acceptance of a particular attachment.
Article 490 addresses contracts made using a contract document, ordinarily formed when all parties sign, seal or affix fingerprints. It also provides for formation where one party performs a principal obligation before execution and the other accepts it, and addresses accepted principal performance despite certain unmet written-form requirements. Do not treat every advance transfer or preparatory step as necessarily satisfying those conditions.
Article 491 separately addresses parties using letters or data messages who require a signed confirmation: formation occurs when that confirmation is signed. Read the exact requirement and later conduct together rather than assuming all formalities can be ignored. Articles 488–489 address material and non-material changes to an offer under domestic law. These domestic provisions should not simply be substituted for the CISG when the Convention governs the formation question.
5. Build a version-by-version evidence table
Preserve complete original-format communications and attachments where available, including headers, dates, delivery or receipt information, account identification and later acknowledgements. Keep screenshots as supporting records, alongside the underlying data and corroborating documents. Do not retrospectively insert signatures, delete unfavourable messages or describe a draft as executed.
| Record | Question to establish | Important limitation |
|---|---|---|
| Quotation and purchase order | Who proposed which goods, quantity, price and delivery terms, and which version was sent? | A document labelled “order” may still contain conditions or remain a proposal. |
| Confirmation and full email chain | Was assent communicated on time, by whom, and with what changes? | Acknowledging receipt and accepting the commercial terms are different acts. |
| Payment and bank records | Which order did the transfer concern, who received it, and how did the supplier acknowledge it? | A payment recipient is not automatically the contracting seller. |
| Production, delivery and later admissions | What performance occurred, what was accepted, and what obligations were acknowledged? | Performance may support agreement without proving every disputed standard term. |
Check the Chinese registered company name and the representative’s authority using the signature and seal guide. Where the payee differs from the supplier, review seller identity and refund liability. These checks help identify the correct claim; a trading name or group logo is insufficient by itself.
6. Connect the formation evidence to a specific remedy
Proving that a sale exists is the starting point. A non-shipment claim still requires the agreed delivery obligation, its due date, any valid extension, the actual breach and the conditions for the remedy sought. A repayment demand may depend on effective termination or another legal basis. See the guide to prepayment recovery after non-shipment. If formation remains disputed, any alternative restitution claim needs separate legal analysis.
For an initial review, provide the parties’ registered names, transaction amount and currency, complete quotation/order versions, confirmation messages, payment records, disputed obligation and any urgent deadline. A review can identify formation and evidence gaps and the available negotiation, litigation or arbitration paths. Service scope and fees should be confirmed before engagement through cross-border business legal services and the consultation page, or email panjianxing46@gmail.com.
Sources checked: 17 October 2026. CISG Articles 1, 4, 6, 8–9, 11–12, 14, 18–19, 23 and 96; the Convention entered into force on 1 January 1988, with State-specific applicability checked separately. PRC Civil Code Articles 469, 488–491; effective 1 January 2021 under Presidential Order No. 45. General information, not a determination of a particular order’s effect or a recovery guarantee.
Author: Jianxing Pan, lawyer and partner at Beijing Chang’an Law Firm, working in Beijing and Shenzhen.
Illustration: AI-generated conceptual image, not a photograph of an actual client, case or shipment.
