CISG Claims — Your Most Powerful (and Most Overlooked) Tool

The United Nations Convention on Contracts for the International Sale of Goods (CISG) is a multilateral treaty providing a uniform framework for international sale-of-goods transactions. Adopted in 1980, effective since 1988, it has been ratified by 97 countries including China (1986), the United States (1988), Germany (1990), and Japan (2008). Notably, the United Kingdom, India, and Hong Kong SAR are not contracting states — a fact with significant implications for contract drafting.

Automatic Application — The Default Rule Most Buyers Miss

The CISG applies automatically to contracts for the international sale of goods between parties whose places of business are in different contracting states (Art. 1(1)(a)). No choice-of-law clause is needed. If your company is in Germany and you buy from a Chinese supplier, the CISG governs by default — even if neither party mentioned it. The CISG is a self-executing treaty forming part of the domestic law of each contracting state. China has declared a reservation under Article 95, so a Chinese court applies the CISG only via Art. 1(1)(a) — both parties in contracting states.

What the CISG Covers — and What It Does Not

The CISG governs the formation of the contract and the rights and obligations of seller and buyer (Art. 4). It does not govern: contract validity, property effects, liability for death/personal injury, agency, limitation periods, or assignment — these are left to applicable national law. It applies only to commercial sale of goods (Art. 2), expressly excluding: consumer goods, auction sales, stocks/shares/negotiable instruments, ships/aircraft, electricity, and contracts where the "preponderant part" of obligations is labor or services (Art. 3(2)).

Excluding the CISG — Article 6 Opt-Out

Parties may exclude the CISG, derogate from its provisions, or vary its effect (Art. 6). But an express exclusion is required. A choice-of-law clause selecting "the laws of China" or "the laws of New York" does not exclude the CISG — because it is part of those jurisdictions' domestic law. To exclude effectively: "The United Nations Convention on Contracts for the International Sale of Goods (CISG) shall not apply to this Agreement."

The CISG contains provisions significantly more favorable to buyers than many domestic systems. Understanding these articles is essential to framing a strong claim.

Part I: Seller's Obligations and Buyer's Remedies

Part II: Damages, Mitigation, and Defenses

Understanding how the CISG differs from the Chinese Civil Code and common law systems is essential. The table below highlights the most significant doctrinal divergences.

The CISG is one of the most successful uniform-law instruments in history, with over 5,000 reported decisions and awards worldwide.

Key Interpretive Sources

• UNCITRAL Digest of Case Law on the CISG: Published by the UN Commission on International Trade Law, regularly updated, synthesizing decisions from contracting states — the most authoritative secondary source on CISG interpretation.
• CISG Advisory Council (CISG-AC) Opinions: A private initiative of leading scholars issuing non-binding but highly persuasive opinions on contested issues including notice requirements, interest rates, and Art. 79 scope.
• CIETAC Awards: The China International Economic and Trade Arbitration Commission regularly applies the CISG in Sino-foreign disputes, contributing to a growing body of CISG jurisprudence with Chinese characteristics.
• Chinese Court Decisions: Reported decisions from Intermediate and Higher People's Courts address CISG issues on notice (Art. 39), damages (Art. 74), and the CISG-Chinese Civil Code relationship.

Chinese Judicial Trends

Chinese courts have developed notable interpretive positions. On Art. 39 notice, a "reasonable time" varies by product: as short as one to two weeks for perishable or seasonal goods, and up to two months for durable goods with latent defects. On Art. 74 damages, Chinese courts follow full compensation and award both direct losses and lost profits, provided foreseeability is satisfied and losses are documented. On the CISG-domestic law relationship, Chinese courts correctly treat the CISG as lex specialis — matters within its scope decided under CISG, matters outside (validity, limitation periods) referred to the Chinese Civil Code.

Whether the CISG applies — and which provisions are invoked — is often the most consequential legal question in a Sino-foreign supply dispute.

When to Argue the CISG Applies

• Damages are your primary claim: CISG's full-compensation principle (Art. 74), without the common law's direct/consequential distinction, favors buyers seeking comprehensive recovery.
• You need price reduction: Art. 50 allows unilateral price reduction proportional to the decrease in value of non-conforming goods — a unique CISG remedy unavailable in most domestic systems, ideal when goods are retained at a lower value.
• Weak or no explicit quality specifications in the contract: Art. 35's default standards (ordinary purpose, fitness for purpose, sample match, adequate packaging) fill gaps difficult to fill under Chinese law alone.
• The supplier invokes force majeure: Art. 79's impediment defense has a far stricter standard. Market shifts, price volatility, and ordinary supply-chain disruptions do not qualify. The CISG strengthens challenges to speculative force majeure claims.

When to Argue the CISG Has Been Excluded

• Notice window may have closed: If the buyer failed to give timely Art. 39 notice, arguing CISG exclusion (e.g., Chinese law clause) may preserve claims under the Civil Code, which may be marginally more forgiving on timing.
• Contract not for "goods" under CISG scope: Mixed service contracts (Art. 3(2)) or contracts for excluded goods (Art. 2) may fall outside the CISG, bringing the dispute under potentially more favorable law.
• Seller in a non-contracting state: If the seller is in the UK, India, or Hong Kong SAR, the CISG may not apply automatically under Art. 1(1)(a), and Art. 1(1)(b) may require analysis. Know your counterparty's jurisdiction.

What "Reasonable Time" Actually Means

The CISG does not define "reasonable time" — it is an autonomous concept interpreted by case law:

• Perishable goods (food, flowers, produce): Notice within days — typically 3-7 days, sometimes 24-48 hours if spoilage is immediately apparent.
• Seasonal goods (holiday merchandise, fashion): Notice within 1-2 weeks. The buyer's resale window diminishes rapidly, making prompt inspection commercially essential.
• Durable goods with apparent defects: Notice within 2-4 weeks from when the buyer could reasonably have discovered the defect. Visual inspection upon arrival is expected.
• Durable goods with latent defects: Notice within 1-2 months after discovery. The clock starts when the buyer discovered or ought to have discovered the non-conformity — not when the buyer got around to it.
• Complex machinery requiring testing: Buyer may test before giving notice, but months of unexplained delay after a defect becomes apparent still bars the claim.

Real Consequences — Cases Where Buyers Lost

A German leather goods buyer (BGH, VIII ZR 259/98) lost its claim after waiting two months to give notice when defects were discoverable. The court held two weeks was reasonable for leather goods — the buyer's argument of waiting for supplier response was rejected; informal complaints are not Art. 39 notices.

In a Shanghai CIETAC arbitration, a European electronics buyer lost a USD 400,000+ claim after waiting five weeks. For electronic components, defects are detectable within days via standard incoming inspection. The tribunal rejected the argument that internal testing required more time — test results were obtainable within two weeks.

How to Protect Yourself — A Practical Protocol

• Inspect immediately upon arrival: Engage third-party inspection (SGS, Bureau Veritas, TÜV) at the destination. Document every defect with photographs, measurements, and written findings.
• Give written notice with specificity: Art. 39(1) requires specifying the nature of the non-conformity. "Poor quality" is insufficient. Identify specific defects, reference contract standards violated, attach evidence.
• Preserve WeChat and email records: Contemporaneous informal communications are valuable evidence of when the buyer became aware — even if not a substitute for formal Art. 39 notice.
• Engage counsel before the notice window closes: A bilingual legal notice invoking the CISG and specifying non-conformity is the safest approach.
• Do not accept or resell without reservation: Accepting and reselling non-conforming goods may waive the non-conformity. Accept only "under reservation of all rights" with accompanying notice.

The CISG adopts a broad, full-compensation approach. Unlike many domestic systems, it allows an aggrieved buyer to claim all foreseeable losses flowing from the seller's breach.

Categories of Recoverable Loss

• Direct loss (damnum emergens): Out-of-pocket loss — price paid for non-conforming goods, inspection/testing, transport/storage, repair/replacement, and mitigation costs. If the buyer paid USD 200,000 for defective machinery and spent USD 30,000 on repairs, both are recoverable.
• Lost profit (lucrum cessans): Profits the buyer would have earned had the contract been performed — lost resale profits, lost manufacturing output, lost business opportunities. If the supplier's non-delivery caused a confirmed 25%-markup resale to fall through, the markup is recoverable — if foreseeable at contracting.
• Incidental damages: Costs of arranging cover purchases, inspection costs, communication expenses. Generally recoverable without significant contest.
• Consequential damages: Losses beyond the immediate transaction — liability to the buyer's own customers, reputational harm, product recall costs. The foreseeability limitation is critical: the supplier must have foreseen these consequences at contract conclusion.

The Foreseeability Test (Art. 74)

The test mirrors Hadley v. Baxendale: damages limited to what the breaching party foresaw or ought to have foreseen at contract conclusion as a possible consequence of breach. The test is objective — what a reasonable person would have foreseen — but informed by actual knowledge. If the buyer told the supplier the goods were destined for a specific resale with a tight deadline, the supplier is deemed to have foreseen consequences of non-delivery. Without disclosure, lost profits from undisclosed resale arrangements may be challenged.

Contested Items: Attorney's Fees and Interest Rate

• Attorney's fees: Disputed. Some tribunals award reasonable fees as part of the loss (forced to incur costs to enforce rights); others treat fees as a procedural matter governed by lex fori or arbitration rules. CIETAC tribunals have discretion and frequently award costs — though typically a fraction of actual fees. Contracts should specify prevailing-party entitlement to legal costs.
• Interest rate: Art. 78 entitles the aggrieved party to interest on sums in arrears, but the CISG does not specify the rate — a well-known gap. Approaches vary: creditor's rate, debtor's rate, currency country's rate, UNIDROIT Principles, or private international law. Specify the applicable interest rate in the contract to avoid this uncertainty.

Danny Luo (Luo Wei), Partner at Jiangsu Tianni Law Firm, has extensive experience applying the CISG in disputes between foreign buyers and Chinese suppliers. We have handled CISG-governed disputes involving quality defects, delivery delays, payment defaults, and contract avoidance — before CIETAC, Chinese courts, and in pre-litigation negotiations — for clients from Germany, the US, Russia, Cyprus, Egypt, Panama, and across Asia-Pacific.

Our approach: confirm CISG applicability (Art. 1, Art. 6 analysis); identify supporting CISG provisions supplemented by UNCITRAL Digest, CISG-AC Opinions, and international case law; and where the CISG is silent (interest rates, validity, limitation periods), identify the applicable gap-filling national law.

We have successfully invoked CISG provisions to:

• Establish conformity standards where contract specifications were incomplete;
• Recover lost profits on resale contracts the supplier knew about at contracting;
• Defeat force majeure claims by proving the impediment was foreseeable and avoidable;
• Preserve buyer claims against Art. 39 notice challenges — including via Art. 40 where the seller knew of non-conformity;
• Secure price reduction under Art. 50 as an alternative remedy where the buyer retained non-conforming goods at reduced value.

For foreign buyers, a lawyer who understands the CISG is not a luxury — it is a necessity. The CISG is frequently the decisive legal framework in Sino-foreign trade disputes. We bring the full weight of the CISG to bear on behalf of our clients.