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A Florida exporter sells machinery to a buyer in Germany. If the contract is silent, which law governs the deal? The answer is often a treaty, not domestic law: the United Nations Convention on Contracts for the International Sale of Goods, known as the CISG. It applies automatically to a vast share of world trade. However, many businesses discover it only after a dispute has started. This guide explains when the Convention applies, what it requires, and when you might want to contract out of it.
What Is the CISG?
The CISG is a uniform sales law prepared by UNCITRAL and adopted in Vienna in 1980. More than 90 states have joined, including the United States, China, and Germany. The United Kingdom is a notable absentee. The Convention’s purpose is simple: give parties from different legal traditions one neutral set of rules on formation, obligations, and remedies. As a result, neither side must litigate under the other’s unfamiliar domestic law.
When the CISG Governs an International Sale of Goods
The Convention applies when the seller and buyer have their places of business in different contracting states. It also applies when the rules of private international law point to the law of a contracting state. Crucially, it applies by default. A contract that simply chooses “New York law” has chosen the CISG. After all, the Convention is part of United States law for international sales.
The scope has limits. The Convention does not cover consumer purchases, sales of ships or aircraft, electricity, or contracts that are predominantly for services. In addition, it deliberately leaves certain questions to domestic law. These include the validity of the contract and the transfer of property in the goods. Notably, the CISG imposes no writing requirement: an oral international sale of goods can bind both parties.
Opting Out — and Doing It Properly
Article 6 lets parties exclude the Convention, and many standard forms do. However, the exclusion must be explicit. Courts have repeatedly held that choosing “the laws of Florida” does not exclude the CISG. The treaty is simply part of that state’s law for cross-border sales. A clause that means to opt out should say so directly. For example: “The United Nations Convention on Contracts for the International Sale of Goods shall not apply.” Whether opting out is wise is a separate question; sellers often benefit from the Convention’s seller-friendly notice rules.
Forming an International Sale of Goods Contract
Formation follows a clean offer-and-acceptance model, with a few surprises for common-law lawyers. The Convention requires no consideration. Moreover, an offer can become irrevocable if it says so, or if the offeree reasonably relied on it. The Convention handles the battle of the forms strictly. A reply that adds material terms, such as price, payment, quality, or dispute resolution, counts as a counter-offer rather than an acceptance. Consequently, the last set of terms exchanged before performance often wins, which makes disciplined document handling a genuine legal advantage.
Interpretation is also distinctive. Tribunals may consider negotiations, established practices, and subsequent conduct to determine the parties’ intent. No parol evidence rule filters them out. In an international sale of goods, emails and prior dealings therefore matter. They can shape the contract as much as the signed document.
Core Obligations: Conformity, Examination, and Notice
The seller must deliver goods that conform to the contract in quantity, quality, and packaging. The goods must also fit their ordinary purpose, or any particular purpose the buyer made known. The buyer, in turn, carries two duties that decide a remarkable number of cases. First, the buyer must examine the goods within as short a period as is practicable. Second, the buyer must notify the seller of any non-conformity within a reasonable time after discovering it. In any event, notice must arrive within two years of delivery.
These notice rules have teeth. A buyer who inspects late or complains vaguely can lose its remedies entirely, even for genuinely defective goods. Therefore, importers should build inspection and written-notice procedures into their receiving operations, not their litigation strategy.
Remedies for Breach of an International Sale of Goods Contract
The Convention’s remedy scheme favours keeping the deal alive. Avoidance, the right to cancel the contract, requires a fundamental breach. That means a breach which substantially deprives the injured party of what it expected to receive. Short of that, the buyer may claim damages, demand repair or substitute goods, or reduce the price. A distinctive tool is the Nachfrist notice. Either party may fix an additional final period for performance. Once that period expires, avoidance becomes available even without a fundamental breach.
Damages follow familiar commercial logic. The injured party recovers its losses, including lost profit. However, recovery stops at what the breaching party could foresee when contracting. The injured party must also mitigate its loss. Moreover, Article 79 excuses a party whose failure results from an impediment beyond its control. The impediment must be one the party could not reasonably foresee or avoid. This is the Convention’s built-in force majeure rule, tested heavily during recent supply-chain disruption.
The CISG, Incoterms, and Trade Usages
The Convention works alongside, not against, the trade’s own tools. Article 9 binds the parties to usages they agreed on and to practices established between themselves. This is how Incoterms typically enter the analysis. Delivery terms such as CIF or FOB then allocate risk and cost with precision the Convention leaves open. For a full treatment, see our guide to the significance of Incoterms. Meanwhile, some commodity sectors avoid the CISG altogether. Standard forms in the grain trade choose English law, so disputes there run through GAFTA arbitration instead.
Practical Guidance for Traders
Three habits prevent most CISG disputes. First, decide consciously whether the Convention should govern your international sale of goods, and draft the choice-of-law clause accordingly. Second, pair the contract with a clear Incoterm and a workable dispute resolution clause. The Convention says nothing about forum. Finally, operationalize the notice rules. Train receiving teams to inspect promptly and to document defects in writing within days, not months.
Talk to Counsel About Your Cross-Border Sales Contracts
In short, the CISG is the default constitution of the international sale of goods. It is neutral, widely adopted, and full of deadlines that reward the prepared. Transnational Matters advises exporters and importers on sales contracts and represents them in international arbitration when transactions fail. Contact our office to review your terms before the next shipment goes out.
Cross-border sales of goods raise questions about governing law, delivery terms, and available remedies. Contact our team to discuss how the CISG may affect your sales contracts.
