Chinese Supplier Demands Extra Payment: What Should Foreign Buyers Check?

Situation

A supplier asks for a further payment after receiving a deposit or purchase price. The explanation may involve higher production costs, changed specifications, delayed collection, storage, freight, or a contractual penalty. The buyer may also be told that shipment will not proceed until the demand is resolved. First distinguish an unpaid balance already due under the contract from a genuinely new charge. Earlier payment does not, by itself, establish that every remaining charge is invalid. Equally, a new invoice does not establish that an additional amount is payable. Identify what each charge covers, its asserted contractual or legal basis, and who is entitled to receive it. This is a general practical guide, not an account of a client matter or advice on a particular dispute.

Key Issue

1. Establish the original bargain. Compare the signed contract, purchase order, accepted quotation, specifications, payment schedule, delivery terms, and incorporated conditions. Was the price fixed, provisional, or subject to an adjustment mechanism? Who agreed to bear freight, customs-related costs, storage, and other expenses? 2. Establish whether anything changed. Did the buyer request additional work, different materials, revised packaging, or delayed shipment? Who accepted the change, and what was agreed about its price? Review the complete communications, not just the latest invoice. 3. Classify each charge separately. A price increase, payment for extra work, agreed damages for breach, and reimbursement of logistics expenses raise different questions. Request the relevant clause, triggering event, calculation, supporting records, and explanation of why the buyer is responsible. Evidence that a supplier incurred a cost does not, on its own, establish the buyer's obligation to pay it. 4. Verify the parties. Match the seller's registered identity with the contract, invoice, payment beneficiary, and correspondence. A manufacturer, trading company, collection agent, and freight provider may be different entities. An account mismatch requires verification; it is not automatic proof of fraud. Confirm payment authority through an independently verified contact.

Documents to Review

• The contract, purchase orders, accepted quotations, incorporated terms, and all amendments, including the governing-law and dispute-resolution clauses.
• Invoices, payment instructions, bank remittance records, and acknowledgments showing how earlier payments were allocated.
• Complete email and messaging histories concerning price, specifications, production, shipment, and changes, retaining original files and timestamps.
• The additional-payment demand, itemized calculation, and evidence supporting each claimed charge.
• Booking records, delivery notices, warehouse statements, storage periods, freight invoices, and evidence identifying who caused any delay.
• Company identification and any agency or collection authorization, together with a dated chronology linking documents to key events.

Possible China-Side Options

• Ask for a written explanation before deciding. Identify disputed items precisely and request the supplier's contractual basis, calculation, supporting documents, and proposed release or delivery arrangements.
• Separate urgent logistics from the wider dispute. Explore an agreed collection timetable, partial shipment, or temporary storage arrangement while documenting responsibility for continuing costs.
• Negotiate a clearly recorded solution where commercially sensible. Specify any revised price, covered charges, delivery deadline, payment recipient, and whether existing claims are preserved or settled.
• Obtain advice before paying disputed charges under a reservation of rights. Such wording does not automatically prevent payment from being treated as acceptance or ensure recovery later.
• If negotiation fails, assess court proceedings or arbitration. Review the dispute-resolution agreement, jurisdiction, applicable rules, time limits, evidence, potential interim measures, and enforcement prospects. Arbitration and litigation are not interchangeable choices.

Risk Factors

• Rejecting every charge may overlook an agreed adjustment, authorized extra work, or recoverable expenses. A disputed surcharge is not, by itself, a reason to stop performing other contractual obligations.
• Accepting a revised invoice, making a further payment, or signing release documents may affect the evidence of agreement or settlement.
• Storage and freight charges require their own analysis. Check rates, dates, causation, reasonableness, contractual allocation, and possible duplication with other claims. A right to charge and a right to withhold goods are separate issues.
• Delay may increase losses or affect remedies. Preserve evidence and consider reasonable measures to prevent avoidable deterioration or accumulating costs.
• A commercial payment dispute should not automatically be characterized as fraud. Unsupported accusations can create additional risk.

Next Step

Prepare a short chronology and a charge-by-charge comparison of the demand against the contract and supporting records. Identify immediate shipment, storage, and response deadlines. Have the applicable law, payment authority, and dispute-resolution route assessed before making a consequential payment, accepting a settlement, or terminating the contract. For a China-side assessment, prepare the contract, payment records, complete correspondence, and the supplier's additional-charge demand. Our contract and commercial dispute services explain the relevant service scope (https://www.haiyulaw.com/services/contracts-disputes). No recovery or legal outcome is guaranteed.