CISG: advantages and disadvantages for German exporters

Few building blocks of German sales and purchasing terms are as widespread as the sentence: “The CISG is excluded.” And few are as rarely reasoned. For legal advisers this is more than a question of style: recommending the exclusion without examining it is an error of professional advice. For German exporters, the reflex is usually a mistake. It trades the only sales law ever written for cross-border trade for a law that was never designed for it, and it gives away drafting freedom that the German BGB and HGB do not offer. A critical, case-by-case assessment almost never takes place (see Feldhusen/Niebling/Poleacov, AGB-Kommentar, 5th edition 2026 (forthcoming), UN-Kaufrecht (CISG); on how widespread the reflex is, Meyer, RabelsZ 85 (2021), 357).

What the CISG is and when it applies

The United Nations Convention on Contracts for the International Sale of Goods of 11 April 1980 (CISG) has been part of German law since 1 January 1991 and is the special statute for the international sale of goods: within its scope it takes precedence over the BGB and HGB (German Federal Court of Justice (BGH), judgment of 25 November 1998 – VIII ZR 259/97). It covers sales contracts for goods between parties with places of business in different states, including contracts for goods yet to be manufactured (Article 3 CISG). It applies in two situations: where both parties are established in contracting states (Article 1(1)(a) CISG), or where the law of a contracting state governs the contract, whether by choice of law or through private international law (Article 1(1)(b) CISG). Its clear rules served as a model for the reform of the German law of obligations.

Three consequences are underestimated in practice:

• It applies of its own force. Where an international sale of goods falls within its scope, the court of a contracting state applies the CISG without any party having to invoke it.
• Exports are practically always covered. Without a valid choice of another law, German export transactions are governed by the CISG, via Article 1(1)(b) CISG in conjunction with Article 4(1)(a) Rome I Regulation even where the buyer is located in a non-contracting state.
• A choice of law opens it up even toward non-contracting states. Whoever agrees on German law with a buyer in the United Kingdom has thereby agreed on the CISG, because it is part of German law. For the same reason, the simple clause “German law applies” does not exclude the CISG; it confirms it (BGH, judgment of 28 May 2014 – VIII ZR 410/12; BGH, judgment of 7 December 2017 – VII ZR 101/14; Piltz, ZVertriebsR 2023, 18).

97 contracting states: where the CISG applies

The CISG has 97 contracting states (as of June 2026, current list at UNCITRAL), among them 16 of the 20 strongest trading nations in the world: the United States, China, Japan, Brazil, Türkiye, Switzerland, and every EU member state except Ireland and Malta. Around 90 percent of German foreign trade and an estimated 80 percent of world trade fall within its scope. Since 1 December 2022 the CISG also extends to contracts with parties in Hong Kong; for contracts concluded there before that date it remains inapplicable (Piltz, NJW 2025, 2524). The most recent accessions are Saudi Arabia and Rwanda (2024), although Saudi Arabia has excluded Articles 25–88 CISG, the substantive core, by reservation.

Non-members, by contrast, include the United Kingdom, India, South Africa, and Nigeria, as well as Indonesia, Thailand, Malaysia, and the United Arab Emirates. In the United Kingdom, ratification has been debated for decades; so far it has failed for lack of parliamentary interest and out of concern for London’s standing as an arbitration venue (Moss, Journal of Law and Commerce 25 (2005), 483; Hoekstra, Uniform Law Review 26 (2021), 43). With contract partners there, the CISG nevertheless applies as soon as the parties choose the law of a contracting state, German law included.

Read the map and the pattern is plain: in trade with Europe, North and South America, and East Asia, the CISG is the default. The gaps lie mainly in South Asia, Africa, and parts of the Arab world; there, the choice of law matters all the more.

The reflex: excluding what you do not know

To a man with a hammer, everything looks like a nail.

Abraham Maslow’s hammer describes German contract practice around the CISG with uncanny accuracy: the BGB and HGB are the familiar tools, so every international transaction is worked with them, and the CISG is excluded by reflex and by boilerplate (Feldhusen/Niebling/Poleacov, AGB-Kommentar, 5th edition 2026 (forthcoming), UN-Kaufrecht (CISG)). Where a reason is given at all, it comes down to the old “the devil you know is better than the devil you do not know”: one’s own familiar law looks safer than the foreign, untested one (cf. Koch, NJW 2000, 910). With the Convention’s content this has little to do: the exclusion is mostly explained by unfamiliarity, hardly ever by unacceptable rules; by now, practitioners report a clear countermovement of companies deliberately switching their foreign trade to the CISG (Piltz, NJW 2025, 2524).

What is more, the exclusion regularly fails. Three typical ways:

• The standard terms containing the exclusion clause are never validly incorporated for lack of transmission, and the CISG applies despite the clause (in detail: “How to incorporate standard terms internationally”).
• Both sides use standard terms that each exclude the CISG but choose different national laws. Such colliding clauses knock each other out, and the CISG remains applicable (on the battle of forms, see “How to incorporate standard terms internationally”).
• The choice-of-law clause simply says “German law applies” and thereby confirms the CISG instead of excluding it.

Whoever wants to exclude the CISG and does it sloppily gets it anyway: unplanned, unprepared, and without contract templates that fit.

How little examination sits behind the boilerplate shows wherever parties exclude what would never have applied: I have seen B2B engagement terms of a respected German business law firm that exclude the CISG, and a notarized real-estate purchase agreement between two German companies that does the same. Both lie outside the Convention’s scope from the outset: the CISG governs the international sale of goods, not a law firm’s engagement and not a domestic real-estate deal. Some chamber-of-commerce templates and form books carry the exclusion along without comment, too.

This is not rhetorical exaggeration. Recommending the exclusion without having examined its consequences for recourse, liability, and avoidance is an error of professional advice (Schroeter, UN-Kaufrecht und Europäisches Gemeinschaftsrecht, 2005, p. 521: “Beratungsfehler”; Janssen, AW-Prax 2003, 347: “liability trap”; in agreement Piltz, ZVertriebsR 2017, 138 (142): the exclusion is “hardly defensible any more” unless convincingly reasoned). In my view the error begins one step earlier, with the failure to engage at all. For companies this means: if your adviser recommends the exclusion, ask for the reasons. “We have always done it this way” is not one.

Both clauses only work if they are validly incorporated into the contract; in international business that means, as a rule: transmit your standard terms.

Advantages and disadvantages for German exporters

For the exporter, that is, the seller, the balance is clear. The overview compares the position under the German BGB/HGB with the CISG:

Above everything stands the freedom of design. Under Article 6 CISG, the parties may derogate from or vary almost any provision of the Convention; the CISG is dispositive down to nearly its last rule. That is the real lever, and it stands in sharp contrast to the German position. German case law on the control of standardized clauses (AGB law) is uniquely strict by international comparison, and that above all in commercial dealings: no other country controls contracts between businesses this tightly, often past commercial practice, for instance in drawing the line to an individually negotiated term far too narrowly (see “No individual agreement”). Nor does it catch the odd exception, but almost the entire body of clauses: apart from the description of performance (the machine, say) and counter-performance (the price), a commercial contract consists almost entirely of standardized clauses, in my estimate around 95 percent. It is precisely these clauses that German law subjects to the strict control of Sections 307 et seq. BGB, on which liability, termination, and exclusion clauses fail in series. The CISG reopens exactly that space: what the Convention governs, the parties may shape, and the benchmark for the content review is then the more flexible CISG model, not the strict one of the BGB.

Four points deserve a closer look.

Avoidance of the contract is the exception under the CISG, not the rule. The CISG keeps troubled contracts alive; avoidance is the last resort: the buyer can only walk away for a fundamental breach, or after a fruitless grace period in the case of non-delivery, and even then only within a reasonable time (Article 49 CISG). Under the BGB, by contrast, a curable defect and an expired deadline are in principle enough; only insignificant breaches bar termination (Section 323(5) BGB).

The BGH speaks of the Convention’s tendency to push back avoidance in favor of the other remedies (BGH, judgment of 24 September 2014 – VIII ZR 394/12); even missing the delivery date is, taken alone, regularly not a fundamental breach (OLG Köln, judgment of 9 January 2025 – 8 U 46/23; OLG Stuttgart, judgment of 12 January 2024 – 5 U 65/23: different where the delay persists or further breaches accumulate). Comparably strict avoidance requirements could not even be validly agreed in standard terms under German law (Piltz, ZVertriebsR 2017, 138 (141)).

For exporters this is hard cash, first of all for custom-built goods: a machine engineered for one specific customer can hardly be sold elsewhere after the deal is unwound. And it matters wherever transport costs and distances carry weight; unwinding a contract across continents is the most expensive outcome a defect dispute can have.

The mandatory German supplier recourse disappears. If the foreign customer resells the goods to consumers, a German supplier operating under the BGB is liable under Sections 445a, 477, and 478 BGB: reversed burden of proof in favor of the customer, no-fault reimbursement of expenses, no grace-period requirements, and most of it mandatory. An exporter who agrees on German law with the CISG excluded imports this straitjacket into its export business. Under the CISG the picture changes: the buyer must prove the lack of conformity at the passing of risk (Article 36 CISG), after two years the matter is closed (Article 39(2) CISG), and liability is open to contractual design (Piltz, ZVertriebsR 2023, 18).

The notice period under Article 39(1) CISG, with its rule of thumb of about one month, is admittedly more generous than the immediate notice of Section 377 HGB (BGH, judgment of 3 November 1999 – VIII ZR 287/98; the CISG Advisory Council stresses in Opinion No. 2 that the circumstances of the case always control, not fixed periods), but unlike Section 377 HGB it also covers defects in title (Article 43 CISG). The benchmark for conformity is more seller-friendly as well: Article 35 CISG looks to the contract and the seller’s standards, Section 434 BGB to objective requirements up to and including consumer expectations.

A genuine limitation of liability becomes possible. Under German standard-terms law, limiting liability for simple negligence in conditions of sale is practically impossible to sustain; nearly every clause fails on the cardinal-duties case law (Section 307 BGB). Under the CISG the benchmark changes: limitation and exclusion clauses fall under the freedom of contract of Article 6 CISG, and the validity limits of national law target intent and gross negligence, to be applied with regard to the international character of the contract (CISG Advisory Council Opinion No. 17, Rules 2 and 4). If the review under Section 307 BGB is consistently aligned with the CISG benchmark, a genuine limitation of liability becomes achievable, at least for simple negligence. In German legal writing I advocate this position, together with Piltz, almost alone so far (Feldhusen/Niebling/Poleacov, AGB-Kommentar, 5th edition 2026 (forthcoming), UN-Kaufrecht (CISG); Piltz, Internationales Kaufrecht, marginal nos. 2–153, 3–91). For exporters this may be the single strongest reason to keep the CISG.

The treaty beats mandatory national law. Within its scope, the CISG displaces conflicting national law, even mandatory and even later-enacted law. An example from advisory practice: after a Canadian buyer became insolvent, the German supplier could rely on the right of retention under Article 71 CISG against the insolvency administrator, with priority over Canadian insolvency law; under the BGB there would have been no basis for that (Piltz, ZVertriebsR 2017, 138 et seq.). Within its scope the CISG moreover bars concurrent national tort claims for losses arising from defective performance: one liability risk fewer, and one that no choice of law could otherwise reach (Cour de Cassation, decision of 17 May 2023 – no. 22-16.290, CISG-online 6359). Add the conflict-of-laws argument: some states do not recognize a choice of law at all or only with strings attached, Brazil for instance only in combination with an arbitration agreement. Within the scope of the CISG, that entire private-international-law exercise is simply unnecessary.

The remaining disadvantages are real but contained:

• No-fault liability can be managed by contract, precisely because limitations of liability hold up under the CISG.
• In any event the seller is only liable for losses foreseeable at the conclusion of the contract (Article 74 CISG) and is exempt for impediments beyond its control (Article 79 CISG; see CISG Advisory Council Opinion No. 7).
• The interplay follows a clear order: within its scope the CISG prevails; what it does not govern, such as limitation periods, set-off, or penalty clauses (on the latter, Bavarian Supreme Regional Court (BayObLG), order of 26 June 2024 – 101 Sch 116/23 e), is governed by the national law applicable alongside it, for German exporters without a different choice: German law.

That is why every CISG choice of law needs a deliberately chosen supplementary national law, and the combination matters: whoever wants to be certain that their liability clauses are not measured against the German review of standard terms after all can pair the CISG with a foreign law as a supplement, for instance Swiss law together with an arbitration clause seated in Switzerland (Piltz, ZVertriebsR 2017, 138 (142)).

One genuine disadvantage remains: courts in different countries read the same provisions differently, colliding standard terms for instance (German courts follow the knock-out rule, US courts the mirror-image rule). The reason is the national legal understanding through which judges read the uniform law; that can create legal uncertainty. It is manageable on two fronts: through clear, interpretation-proof contract clauses, and through the tactical choice of forum or arbitral seat, which decides which interpretive tradition applies in the first place. Whoever calls the CISG incalculable on that account is arguing past reality: 7,869 published decisions, among them 6,848 court decisions from 75 jurisdictions and 1,021 arbitral awards, freely accessible on CISG-online (as of June 2026). Germany alone accounts for more than 900 of them; German courts, from the Federal Court of Justice down to the courts of appeal, have applied the CISG as densely as hardly any other country, and their decisions are freely available in German. Contested questions of interpretation are worked through by the CISG Advisory Council, an international expert body whose opinions are cited by courts worldwide.

The reverse direction is even clearer: in purchasing, the CISG gives the German importer a no-fault, guarantee-like damages claim against its supplier that the BGB does not know and that German standard terms could not validly replicate. For international purchasing, the CISG is simply unmatched (Piltz, ZVertriebsR 2017, 138 (141)).

When exclusion is justifiable

There are settings in which exclusion is a reasoned decision:

• where a group has standardized worldwide on another contract regime and has the bargaining power to enforce it;
• where contract templates are so deeply rooted in BGB concepts that a short-term switch creates more risk than it removes;
• or where the contract falls outside the Convention’s scope anyway because assembly and service obligations predominate (Article 3(2) CISG) and a clarification avoids disputes.

What these cases share: they are the result of an examination, not a boilerplate block. Whoever excludes should do it effectively and choose the applicable law deliberately.

What you should do

1. Take stock. Check where your standard terms and contracts exclude the CISG, and whether there is a reason beyond habit.
2. Align your exports with the CISG. Agree on its application expressly, framework agreements included, and use the freedom it grants: limit liability, sharpen the notice regime, fix the supplementary national law.
3. Scrutinize purchasing all the more. As a buyer you benefit from your supplier’s no-fault liability; excluding the CISG in purchasing terms usually hurts yourself.
4. Exclude only with reasons. If so, do it expressly (“to the exclusion of the CISG”) and with validly incorporated standard terms, otherwise the CISG applies anyway.
5. Train sales and procurement. Day-to-day business decides what applies: offers, orders, order confirmations.

Freely accessible sources

Nobody has to apply or avoid the CISG on a hunch; the essential working tools are free:

• CISG-online: 7,869 decisions in full text, plus materials and full-text search (as of June 2026).
• UNCITRAL status page: the current list of contracting states, reservations included.
• CISG Advisory Council: opinions on contested questions of interpretation.
• UNCITRAL Digest: a systematic case-law overview for every article of the Convention.

Conclusion

The CISG is not an exotic special regime; it is the default statute of German exporting: 97 contracting states, automatic application, four decades of case law. For sellers it beats the BGB/HGB on the points that decide disputes, from avoidance as the exception, to the vanishing mandatory recourse, to the wider drafting freedom in standard terms. Its disadvantages can be managed, its gaps are known. The right order is therefore not “exclude it because you do not know it”, but: examine, draft, decide deliberately. That examination is exactly what I take off exporters’ hands, before the next order confirmation locks in the wrong default.

Häufige Fragen

What is the CISG?

The United Nations Convention on Contracts for the International Sale of Goods (CISG) is a 1980 UN convention with uniform rules for international sales contracts. It has been part of German law since 1991 and, as the special statute for international sales of goods, takes precedence over the German BGB and HGB. It currently has 97 contracting states, including almost all of Germany’s major trading partners.

Does the CISG apply automatically?

Yes. Courts in contracting states apply it of their own motion whenever a sales contract between parties from different states falls within its scope. German export business is regularly governed by the CISG even without a choice of law, and even where the buyer is located in a non-contracting state, because private international law leads to German law and with it to the CISG. It also applies where the parties choose the law of a contracting state: even with a contract partner in the United Kingdom, agreeing on German law leads to the CISG.

Does the clause ‚German law applies’ exclude the CISG?

No. The CISG is part of German law. Under settled case law, choosing German law confirms the CISG rather than excluding it. Exclusion must be explicit, for instance: ‚German law applies, to the exclusion of the CISG.’ And the clause only works if it has been validly incorporated into the contract.

Which states have joined the CISG?

97 states (as of June 2026), including the United States, China, Japan, Brazil, Türkiye, and every EU member state except Ireland and Malta. Since 1 December 2022 the CISG also extends to Hong Kong. Non-members include the United Kingdom, India, South Africa, Nigeria, Indonesia, and the United Arab Emirates.

Should German exporters exclude the CISG?

In most cases, no. For sellers, the CISG is more favorable than the BGB and HGB on the points that matter: avoidance of the contract is the exception, the mandatory German supplier recourse does not apply, and standard terms are measured against the more flexible CISG benchmark. Disadvantages such as strict liability can be managed by contract drafting. Exclusion makes sense only as a reasoned case-by-case decision.

Reference: Poleacov, P. (2026). CISG: advantages and disadvantages for German exporters. INN.LAW. https://inn.law/en/perspectives/cisg-for-german-exporters/

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