CISG Contract Termination in Turkey: When Can a Foreign Buyer Avoid an International Sales Contract? (2026 Updated Guide)

When can a foreign buyer terminate an international sales contract involving Turkey under the CISG? Learn about fundamental breach, defective goods, non-delivery, additional time, notice, restitution, damages and contractual risk.

International sales contracts involving Turkish sellers frequently raise a critical question when performance goes wrong: can the foreign buyer terminate the entire contract, or must the buyer accept the goods and pursue another remedy? Where the United Nations Convention on Contracts for the International Sale of Goods (CISG) applies, the legal concept is generally referred to as avoidance of the contract. Avoidance is a significant remedy because the CISG does not permit every delay, defect or contractual disagreement to bring an international sale automatically to an end. In many cases, the central issue is whether the seller’s breach is sufficiently serious, whether additional time should first be granted, whether notice was given properly and whether the buyer preserved the right to avoid the contract.

Does the CISG Apply to an International Sales Contract Involving Turkey?

Turkey is a contracting state to the CISG. Accordingly, the Convention can apply to qualifying international sales of goods where the relevant requirements are satisfied.

However, the parties’ contract must always be examined first. The CISG permits parties to exclude its application or modify the effect of many of its provisions. A foreign buyer should therefore determine whether the agreement expressly excludes the CISG, selects another substantive regime or contains contractual provisions affecting termination.

What Does “Avoidance” Mean Under the CISG?

Avoidance essentially releases the parties from their future contractual obligations, subject to provisions concerning damages and other rights that survive termination.

It is considerably more serious than requesting repair, replacement, a price reduction or damages while maintaining the contract.

For that reason, avoidance is generally not available merely because the seller committed some form of breach.

Fundamental Breach Is Central to CISG Avoidance

Article 25 of the CISG introduces the concept of a fundamental breach. In simplified terms, a breach is fundamental where it results in such detriment to the other party as substantially to deprive that party of what it was entitled to expect under the contract, subject to the Convention’s foreseeability qualification.

This means the seriousness and commercial consequences of the breach matter.

Not Every Defective Product Justifies Termination

Suppose a foreign buyer purchases industrial equipment from a Turkish manufacturer and discovers a minor defect that can be repaired quickly without materially affecting the machine’s value or intended use.

That defect may create contractual remedies, but it does not necessarily justify avoidance of the entire contract.

The buyer should therefore distinguish non-conformity from fundamental non-conformity.

When Can Defective Goods Amount to a Fundamental Breach?

The analysis depends on the contract and circumstances. Relevant considerations may include whether the goods can still be used for their intended commercial purpose, whether defects can realistically be repaired, the cost and time required for correction, safety implications, resale possibilities and whether the buyer has been substantially deprived of the expected contractual benefit.

For specialized machinery, medical products, custom-manufactured equipment or goods produced for a particular regulatory market, non-conformity may have significantly greater commercial consequences than an ordinary cosmetic defect.

Non-Delivery Can Support Avoidance

A seller’s failure to deliver can eventually permit avoidance under the CISG framework. However, the legal route can depend on whether the failure itself constitutes a fundamental breach or whether the buyer first provides an additional period for performance.

This distinction is particularly important where the seller is merely late rather than clearly refusing to deliver.

Late Delivery Does Not Automatically Terminate the Contract

Commercial parties frequently assume that missing the contractual delivery date automatically permits cancellation.

That is not always correct under the CISG.

If time was genuinely essential to the transaction, serious delay may potentially constitute a fundamental breach. In other circumstances, the buyer may need to consider granting an additional reasonable period for performance.

Additional Time for Performance

Article 47 permits the buyer to fix an additional period of reasonable length for the seller to perform its obligations.

This mechanism is often referred to as a Nachfrist period.

If the seller fails to deliver within that additional period, or declares that it will not do so, Article 49 may provide the buyer with a basis for declaring the contract avoided in the circumstances specified by the Convention.

The Additional Period Must Be Practical and Clear

A vague message such as “please deliver as soon as possible” may create unnecessary uncertainty.

Where the buyer intends to rely on an additional-performance period, the communication should clearly establish the period provided to the seller and the performance expected.

What If the Seller Says It Will Not Perform?

An explicit refusal to perform can materially change the analysis.

The buyer should preserve the seller’s written communications and determine whether the refusal constitutes a fundamental breach or otherwise supports avoidance under the applicable CISG provisions.

Anticipatory Breach Can Also Become Relevant

Sometimes the problem becomes clear before the contractual performance date.

Under the CISG framework, where it becomes clear before performance is due that a party will commit a fundamental breach, avoidance before the performance date may potentially become relevant under the Convention’s anticipatory-breach provisions.

This is particularly important in international transactions involving insolvency, factory shutdowns, inability to manufacture or clear refusal to supply.

Adequate Assurance and Suspension Should Be Considered

A foreign buyer should not immediately jump from commercial concern to termination.

Depending on the circumstances, the CISG’s rules concerning suspension of performance may become relevant where it becomes apparent that the other party will not perform a substantial part of its obligations.

The exact contractual situation should be evaluated carefully before payment, shipment or acceptance obligations are suspended.

Installment Contracts Require Separate Analysis

International supply agreements frequently involve multiple deliveries.

Under Article 73, a breach concerning one installment does not automatically justify termination of the entire contractual relationship. The seriousness of the breach and its implications for future installments become important.

The buyer should therefore determine whether avoidance concerns one shipment, future shipments or the entire contract.

Non-Conforming Goods Must Be Examined Promptly

Where the dispute concerns defective or incorrect goods, Articles 38 and 39 of the CISG can become critical.

The buyer generally needs to examine the goods within the period required by the circumstances and notify the seller of the lack of conformity within a reasonable time after discovering or when it ought to have discovered it.

Delayed inspection can therefore seriously weaken the buyer’s position.

The Notice Should Identify the Non-Conformity

A general complaint that “the goods are unacceptable” may be insufficiently precise for a serious international dispute.

The buyer should document the nature of the defect, affected products, quantities, serial or batch numbers, photographs, technical findings and relevant contractual specifications.

Preserve Evidence Before Repairing the Goods

Where substantial defects are alleged, the buyer should preserve the condition of the goods before carrying out major repairs or modifications.

Photographs, videos, independent expert reports, inspection records, samples and correspondence may later become essential.

Seller’s Right to Cure Can Affect Avoidance

The CISG contains mechanisms allowing a seller, in appropriate circumstances, to remedy failures in performance.

A buyer should therefore consider whether the seller can cure the defect without unreasonable delay, inconvenience or uncertainty.

A defect that can be corrected promptly may present a very different avoidance analysis from an irreversible defect.

Replacement Goods May Be Relevant

Where goods fail to conform, the CISG contains specific rules concerning substitute delivery. The requirements for demanding substitute goods are stricter than those applicable to some other remedies and generally involve fundamental breach.

The buyer should therefore choose the requested remedy carefully.

Price Reduction Is an Alternative Remedy

Where non-conforming goods are retained, Article 50 may provide a price-reduction remedy in qualifying circumstances.

For some commercial disputes, price reduction combined with damages may be economically preferable to avoidance.

Damages Can Be Claimed Without Avoiding the Contract

A buyer does not necessarily need to terminate the contract to claim damages.

Under the CISG, damages can potentially include losses resulting from the breach, subject to requirements including causation, foreseeability and mitigation.

The buyer should therefore compare the economic consequences of keeping the contract alive against termination.

Lost Profit Claims Require Evidence

If the Turkish seller’s breach causes the foreign buyer to lose downstream sales or production, the buyer should preserve customer contracts, purchase orders, production schedules and financial records.

A speculative assertion of lost profit will generally be more difficult to establish than a documented commercial loss.

The Buyer Has a Duty to Mitigate Loss

Article 77 requires reasonable measures to mitigate losses resulting from the breach.

A buyer that allows avoidable losses to accumulate may face arguments that recoverable damages should be reduced.

Cover Purchases Can Be Important

After valid avoidance, the buyer may purchase replacement goods from another supplier.

Where the CISG requirements are satisfied, the difference between the contract price and the price of a reasonable substitute transaction may become relevant to damages.

Timing and commercial reasonableness should be documented.

Market-Price Damages May Also Be Relevant

Where no substitute transaction is made, the CISG contains a market-price mechanism in qualifying circumstances.

The availability and calculation of this remedy depend on the facts and applicable provisions.

Avoidance Requires a Declaration

A crucial point is that a contract does not simply disappear because the buyer internally decides that the seller committed a fundamental breach.

Under Article 26, a declaration of avoidance is effective only if notice is given to the other party.

The wording and timing of the notice can therefore become decisive.

Avoidance Notice Should Be Unambiguous

The buyer should clearly communicate that it is declaring the contract avoided rather than merely threatening future termination or reserving rights.

Ambiguous commercial correspondence can create disputes about whether avoidance actually occurred.

Timing of the Avoidance Declaration Matters

Article 49 contains timing requirements that can become particularly important where goods have already been delivered.

A buyer that knows of a serious breach but continues performing for an extended period without declaring avoidance may risk losing the remedy.

Continuing to Use the Goods Can Create Problems

If the buyer claims the goods are so defective that the entire contract must be avoided but continues using or reselling them extensively, the seller may challenge the buyer’s position.

The factual consequences depend on the circumstances, but commercial conduct should remain consistent with the legal strategy.

Can the Buyer Return the Goods?

Avoidance generally triggers restitution consequences under the CISG. However, the buyer’s ability to return goods substantially in the condition received can become relevant under Articles 81 and 82, subject to the Convention’s exceptions.

The condition and location of the goods should therefore be assessed before declaring avoidance.

Who Pays for Return Transportation?

The CISG dispute may involve damages and restitution, but the parties’ contract, delivery terms and factual responsibility should also be reviewed.

For expensive machinery or bulk goods, return freight can itself become a major component of the dispute.

Incoterms Do Not Decide Whether Avoidance Is Valid

International sales contracts often incorporate Incoterms rules.

Those rules can allocate important delivery, cost and risk responsibilities, but they do not by themselves answer whether a party has a right to avoid the contract under the CISG.

The sales contract and applicable substantive law must be analyzed separately.

Force Majeure Is Different From Avoidance

A seller may respond to the buyer’s termination notice by relying on an impediment under Article 79 or a contractual force-majeure clause.

The effect of such a defense should be examined separately. Exemption from damages does not automatically resolve every issue concerning contractual performance or avoidance.

Contractual Termination Clauses Still Matter

The CISG permits substantial party autonomy.

International sales agreements may define specific termination events, cure periods, quality thresholds or delivery deadlines. Those provisions should be read together with the Convention rather than ignored.

Choice of Law Clauses Must Be Read Carefully

A clause stating that the contract is governed by Turkish law does not necessarily mean that the CISG is excluded.

Because the CISG forms part of the applicable international sales framework for qualifying transactions, parties wishing to exclude it commonly need sufficiently clear contractual language.

The exact clause should therefore be reviewed.

Jurisdiction and Arbitration Clauses Are Separate

The law governing the merits and the forum deciding the dispute are different questions.

A contract may be governed by the CISG while disputes are heard by Turkish courts, foreign courts or an arbitral tribunal.

Before sending a termination notice, the buyer should identify the dispute-resolution mechanism.

Turkish Seller’s Assets May Affect Enforcement Strategy

A foreign buyer considering substantial damages should identify whether enforcement may ultimately be required against assets in Turkey.

This can affect litigation, arbitration and interim-measure strategy.

Bank Guarantees and Letters of Credit Need Separate Analysis

Avoidance of the underlying sales contract does not automatically determine the status of an independent bank guarantee or documentary credit.

If the transaction includes such instruments, urgent banking-law and contractual analysis may be required before demands or payments occur.

Foreign Buyers Should Avoid Premature Termination

One of the most dangerous mistakes is declaring termination before the CISG or contract permits it.

Wrongful avoidance can itself constitute a breach and expose the foreign buyer to damages.

The buyer should therefore establish the legal basis before sending an irrevocable termination notice.

Foreign Buyers Should Also Avoid Waiting Too Long

The opposite mistake can be equally serious.

Where the buyer has a valid avoidance right, excessive delay may affect the availability of that remedy, particularly after delivery.

A rapid legal and evidentiary review is therefore essential.

Practical Evidence Checklist for a CISG Termination Dispute

The foreign buyer should preserve the signed contract, purchase orders, specifications, invoices, payment records, correspondence, delivery documents, inspection reports, photographs, expert findings, notices of defects, additional-performance notices, seller responses, replacement-purchase records and evidence of commercial losses.

The chronology should show precisely what happened and when.

2026 Practical Assessment for Foreign Buyers

A foreign buyer considering avoidance of an international sales contract involving a Turkish seller should ask five questions immediately: Does the CISG apply? What exactly is the seller’s breach? Is the breach fundamental or is additional time required? Has the buyer complied with inspection and notice obligations? Has a clear and timely declaration of avoidance been or can it still be made?

The answers should be established before the buyer stops payment, rejects goods, purchases substitutes or declares the entire commercial relationship terminated.

Frequently Asked Questions

Can a foreign buyer terminate a Turkish sales contract because the goods are defective?

Potentially, but not every defect permits avoidance. The defect may need to constitute a fundamental breach unless another applicable contractual or CISG basis for avoidance exists.

What is a fundamental breach under the CISG?

It is essentially a breach that substantially deprives the other party of what it was entitled to expect under the contract, subject to the Convention’s foreseeability rule.

Can late delivery justify termination?

Potentially. Serious delay may constitute a fundamental breach in appropriate circumstances. Otherwise, an additional reasonable period for delivery may first become important.

Must the buyer give the seller additional time?

Not in every case. Whether an additional period is required or strategically appropriate depends on the nature of the breach and the CISG provision relied upon.

Can the buyer terminate without sending notice?

Avoidance under the CISG requires a declaration communicated to the other party. Internal intention alone is insufficient.

Can the seller repair defective goods?

The CISG may allow cure in appropriate circumstances. Whether cure prevents or affects avoidance depends on the seriousness of the breach and the circumstances.

Can the buyer claim damages without terminating the contract?

Yes. Avoidance is not a prerequisite for every damages claim under the CISG.

Can the buyer purchase replacement goods?

After valid avoidance, a reasonable substitute transaction may become relevant to the calculation of damages.

Does choosing Turkish law automatically exclude the CISG?

Not necessarily. The wording of the governing-law clause and the circumstances of the transaction should be reviewed carefully.

What should a foreign buyer do before sending a termination notice?

Review CISG applicability, determine whether the breach is fundamental, check inspection and notice compliance, assess any cure or additional-performance period, preserve evidence and ensure that the proposed avoidance declaration is legally justified and timely.

Client-Focused Legal Support for CISG Contract Disputes

Fırat Fesih Kaya Law Office assists foreign buyers, international companies and investors in disputes involving Turkish sellers, including CISG contract avoidance, defective goods, non-delivery, delayed delivery, international supply agreements, damages, substitute purchases, bank guarantees, arbitration and cross-border enforcement. Lawyer Fırat Fesih Kaya provides legal assistance in evaluating whether a breach justifies avoidance, preparing termination and breach notices, preserving claims for damages, negotiating with Turkish counterparties and pursuing litigation or arbitration arising from international sales contracts.

Phone: +90 312 434 22 22
Mobile / WhatsApp: +90 532 769 22 22
Email: info@firatfesihkaya.av.tr
Address: Mevlana Boulevard No:221, Yıldırım Tower, Office No:148, 06520 Balgat, Çankaya, Ankara, Turkey