CISG (Vienna Sales Convention) Application in Turkish Cross-Border Trade Disputes (2026 Updated Guide)

Learn when the CISG applies to international sales contracts involving Turkey, how parties can exclude it, and how it affects delivery, defective goods, payment, termination, damages and cross-border commercial disputes.

The United Nations Convention on Contracts for the International Sale of Goods, commonly known as the CISG or Vienna Sales Convention, can fundamentally change the legal analysis of a cross-border sales dispute involving a Turkish company. Turkey acceded to the CISG in 2010, and the Convention entered into force for Turkey on 1 August 2011. Since then, international sales disputes involving Turkish buyers, sellers, manufacturers, distributors and exporters may fall directly within the CISG rather than being governed exclusively by the domestic rules that the parties initially expect.

This distinction can affect whether goods are considered conforming, when the buyer must inspect them, how quickly defects must be notified, whether a breach permits avoidance of the contract, whether additional time must be granted, and what damages can be recovered. Foreign companies trading with Turkey should therefore determine at the beginning of a dispute whether the CISG applies before building their contractual claims or defenses.

What Is the CISG?

The CISG is an international convention establishing uniform rules for international contracts for the sale of goods. UNCITRAL describes its purpose as providing a modern, uniform and fair regime for international sales contracts and reducing uncertainty and transaction costs in international commerce.

It does not regulate every aspect of a commercial relationship. Instead, it primarily governs matters concerning formation of the sales contract and the rights and obligations of buyers and sellers arising from the international sale of goods.

Does the CISG Apply in Turkey?

Yes. Turkey is a Contracting State, and the Convention has been in force for Turkey since 1 August 2011.

Accordingly, a Turkish company entering into an international sales transaction should not assume that ordinary domestic sales provisions alone govern the contract.

When Does the CISG Apply Automatically?

One of the principal situations is where the parties have their places of business in different states and those states are CISG Contracting States.

For example, a qualifying sale between a Turkish company and a company located in another Contracting State can fall within the Convention without the contract containing a clause expressly stating that “the CISG applies.”

This automatic application is frequently overlooked in international trade disputes.

The Nationality of the Parties Is Not the Main Test

The CISG focuses principally on the parties’ places of business rather than the nationality of shareholders, directors or corporate owners.

A foreign-owned company established and operating in Turkey should therefore not assume that the nationality of its investors determines whether the Convention applies.

What If Only One Party Is Located in a CISG State?

The analysis can become more complex. UNCITRAL explains that the CISG may also apply where private international law rules lead to application of the law of a Contracting State.

The governing-law clause, forum, conflict-of-laws rules and any CISG reservations relevant to the states concerned should therefore be reviewed carefully.

Choosing Turkish Law Can Still Lead to the CISG

A common contractual mistake is assuming that a clause stating “This agreement shall be governed by Turkish law” necessarily excludes the CISG.

Because the CISG forms part of the legal framework applicable in Turkey to transactions falling within its scope, a choice of Turkish law may not by itself demonstrate an intention to exclude the Convention.

If parties want to exclude the CISG, the contract should address that issue clearly.

Can the Parties Exclude the CISG?

Yes. The Convention recognizes party autonomy and allows parties to exclude its application or, subject to applicable limitations, vary the effect of its provisions.

This makes contract drafting extremely important.

How Should the CISG Be Excluded?

Where exclusion is commercially intended, an express clause is generally preferable.

A contract can clearly state that the CISG does not apply to the agreement rather than relying on an ambiguous general governing-law clause.

Can the Parties Expressly Choose the CISG?

Parties can also structure their agreement around the CISG where appropriate. In international transactions, this can provide a neutral legal framework instead of requiring one party to accept the other party’s unfamiliar domestic sales law.

What Transactions Does the CISG Cover?

The Convention principally concerns international sales of goods between private commercial parties within its scope. UNCITRAL notes that consumer sales, services and certain specifically excluded categories are outside its ordinary coverage.

The characterization of the transaction should therefore be examined before assuming that the CISG applies.

Mixed Goods and Services Contracts Require Special Attention

Many modern commercial agreements combine machinery, equipment, installation, commissioning, engineering, training and maintenance.

The existence of services does not automatically mean that the CISG is irrelevant. The transaction must be analyzed to determine whether the agreement is fundamentally a sale of goods or whether the service component changes its legal characterization.

Manufacturing Contracts Can Fall Within the CISG

Goods do not necessarily have to exist when the contract is signed. Contracts involving goods to be manufactured or produced can potentially fall within the Convention, subject to the applicable CISG rules concerning materials supplied by the purchaser and the overall nature of the transaction.

This is particularly relevant to customized machinery, industrial equipment and manufactured components.

What Does the CISG Not Govern?

The CISG does not resolve every issue connected with a sales contract. UNCITRAL specifically identifies matters such as the validity of the contract and the effect of the contract on ownership of the goods as matters outside the Convention’s scope.

Questions outside the CISG may therefore still require application of the relevant domestic law.

Seller’s Core Obligations

Under the CISG framework, the seller’s principal obligations include delivering the goods, handing over relevant documents and complying with the contractual requirements concerning the goods.

Disputes frequently concern delivery date, delivery location, quantity, quality, specifications, packaging and accompanying documentation.

Conformity of Goods Is a Major Source of Disputes

International buyers commonly allege that delivered goods are defective, technically inadequate or inconsistent with the contract.

Under the CISG, the conformity analysis can involve contractual quality, quantity, description, ordinary or particular purposes, packaging and other circumstances.

The precise contract remains critically important.

Technical Specifications Should Be Incorporated Clearly

For machinery, chemicals, industrial materials and customized goods, vague specifications can generate major disputes.

Contracts should clearly identify drawings, standards, samples, tolerances, certificates and performance requirements.

Inspection of Goods Can Be Critical

A buyer cannot simply discover an alleged defect months later and assume that every remedy remains available.

The CISG contains important rules concerning examination of goods and notification of lack of conformity.

Buyers should therefore establish inspection procedures immediately after delivery.

Notice of Non-Conformity Is One of the Most Important CISG Issues

A buyer alleging defective goods should provide sufficiently clear notice identifying the nature of the alleged non-conformity within the applicable CISG framework.

Generic statements such as “the goods are bad” can create avoidable disputes.

Keep Evidence of the Notice

Preserve emails, inspection reports, photographs, laboratory findings, customer complaints and correspondence with the seller.

In international litigation or arbitration, proving when and how the seller was notified can become decisive.

Sellers Should Not Ignore Defect Notices

A seller receiving a complaint should immediately investigate the relevant batch, manufacturing records, transport conditions and specifications.

Silence can allow factual disputes to become more difficult to manage.

Fundamental Breach and Contract Avoidance

Not every contractual breach permits immediate termination or avoidance of the entire contract.

The CISG uses the concept of fundamental breach, which can become central when one party attempts to end the contractual relationship.

The seriousness and consequences of the breach must therefore be analyzed carefully.

Defective Goods Do Not Automatically Justify Avoidance

A defect may potentially be capable of repair, replacement, price reduction or damages without necessarily justifying avoidance.

The buyer should assess proportionality and available remedies before declaring the contract terminated.

Additional Time for Performance

The CISG contains mechanisms allowing a party, in appropriate circumstances, to provide an additional period for performance.

This can become important where the seller delivers late or the buyer fails to make payment.

Seller’s Right to Cure

Depending on the circumstances, the seller may have an opportunity to remedy defective or incomplete performance.

Buyers should therefore be cautious about rejecting cure automatically where the Convention permits the seller to correct the problem.

Price Reduction

Where delivered goods do not conform to the contract, price reduction can potentially become an important remedy.

This may be commercially preferable where the buyer can still use the goods but their actual value is lower than contractually promised.

Damages Under the CISG

Damages can include losses suffered as a consequence of contractual breach, subject to the Convention’s requirements and limitations.

The claimant should establish breach, loss and causal connection with reliable commercial evidence.

Lost Profits May Be Relevant

In appropriate circumstances, lost profits can potentially form part of a damages claim.

However, the claimed loss should be demonstrated with evidence rather than speculative projections.

Customer contracts, historical sales, production records and financial documentation may become important.

Foreseeability Limits Damages

The CISG limits recoverable damages through its foreseeability framework.

The commercial circumstances known or reasonably foreseeable when the contract was concluded can therefore become highly important.

Mitigation of Loss Is Essential

A party suffering loss cannot simply allow damages to accumulate unnecessarily.

Reasonable measures should be considered to reduce the loss, such as obtaining replacement goods, protecting deteriorating products, arranging alternative transportation or reselling usable goods where appropriate.

Cover Purchases Can Become Important

A buyer that urgently needs replacement goods may purchase substitute goods and later seek relevant damages where the legal requirements are satisfied.

The timing, price and commercial reasonableness of the replacement transaction should be documented.

Market Price Evidence Can Matter

Where substitute transactions are unavailable or disputed, market-price evidence may become relevant depending on the remedy sought.

Preserve quotations, industry pricing and contemporaneous commercial offers.

Late Delivery Disputes

International sales frequently involve delayed production, missed shipping dates and port congestion.

The contract should be examined together with the CISG to determine whether delay constitutes breach, whether additional time should be granted and what damages may be recoverable.

Force Majeure and Impediments

The CISG contains a framework addressing certain failures caused by impediments beyond a party’s control.

However, commercial difficulty or increased expense should not automatically be treated as a complete exemption from contractual responsibility.

The precise event, foreseeability and possibility of avoiding or overcoming its consequences should be examined.

Sanctions and Export Restrictions

Cross-border sales may be disrupted by sanctions, export controls, import restrictions or banking blocks.

Whether such events excuse performance under the CISG depends on the circumstances and contractual allocation of risk.

Parties should also review force-majeure, sanctions and compliance clauses separately.

Currency and Payment Disputes

The CISG can govern the buyer’s obligation to pay the purchase price, while banking regulations, payment mechanisms and other domestic-law issues may require separate analysis.

Letters of credit, bank guarantees and documentary collection arrangements should therefore be examined independently where relevant.

Retention of Title Requires Separate Analysis

Because the Convention does not comprehensively govern the effect of a contract on property rights in the goods, retention-of-title questions can require application of the relevant domestic law.

This is particularly important where the buyer becomes insolvent or creditors seize the goods.

Limitation Periods Should Not Be Assumed From the CISG

The CISG itself should not be treated as a complete limitation-period code for every international sales claim.

The applicable limitation framework must be determined separately according to the governing legal system and other applicable instruments.

Arbitration Clauses Remain Important

The CISG governs substantive sales-law issues within its scope; it does not itself determine where every dispute must be resolved.

A contract may simultaneously provide for CISG substantive rules and international arbitration.

Turkish Courts Can Apply the CISG

Where a Turkish court has jurisdiction over a dispute falling within the Convention’s scope, the applicability of the CISG should be addressed expressly by the parties.

Pleadings should not automatically begin and end with domestic sales provisions if the international transaction falls within the Convention.

Foreign Judgments and Arbitral Awards Are Separate Issues

Winning a CISG claim does not eliminate enforcement questions.

Where litigation or arbitration occurs abroad, recognition and enforcement in Turkey should be analyzed separately from the substantive sales dispute.

Incoterms Do Not Replace the CISG

Terms such as FOB, CIF, FCA or DDP can allocate important delivery, transport, cost and risk responsibilities, but they do not automatically replace the entire CISG framework.

The contract, applicable Incoterm and CISG should be interpreted together where relevant.

CISG and Choice-of-Law Clauses Should Be Drafted Together

A well-drafted international sales contract should answer two separate questions: what substantive law governs and whether the CISG applies.

Leaving the second question unresolved can create expensive preliminary litigation.

Common Mistake: Assuming Turkish Commercial Law Automatically Controls

A Turkish buyer may commence proceedings relying exclusively on domestic contract provisions without first checking the CISG.

A foreign seller may make the same mistake by relying solely on its own national law.

The Convention should be considered before substantive claims are finalized.

Common Mistake: Excluding the CISG Accidentally

Some parties exclude the Convention using standard boilerplate without understanding the consequences.

The decision to exclude should be commercial and deliberate.

Common Mistake: Failing to Notify Defects Promptly

A buyer may spend months conducting internal investigations before formally informing the seller.

That delay can create serious CISG problems.

The seller should be notified promptly while technical investigation continues.

Common Mistake: Declaring Immediate Termination

Parties sometimes respond to a single defective delivery by announcing that the entire commercial relationship is terminated.

Whether avoidance is legally available requires analysis of the breach and the CISG’s remedy structure.

Evidence Checklist for Turkish CISG Disputes

Businesses should preserve the signed contract, amendments, purchase orders, invoices, technical specifications, correspondence, inspection records, photographs, laboratory reports, shipping documents, customs records, payment documents, defect notices, repair proposals, replacement purchases and evidence of commercial loss.

A chronological transaction file can substantially strengthen the dispute strategy.

2026 Contract Drafting Strategy

Companies trading internationally with Turkey should expressly address the CISG when drafting new contracts in 2026. Turkey remains a CISG Contracting State, and UNCITRAL currently lists 97 Contracting States overall.

The agreement should clearly address governing law, CISG inclusion or exclusion, dispute resolution, jurisdiction or arbitration, specifications, inspection, notice procedures, delivery, Incoterms, payment, limitation of liability, force majeure and damages.

Frequently Asked Questions

Is Turkey a CISG Contracting State?

Yes. Turkey acceded on 7 July 2010, and the Convention entered into force for Turkey on 1 August 2011.

Does the CISG apply automatically to every Turkish international sales contract?

No. Its scope must be analyzed according to the parties’ places of business, nature of the transaction, applicable conflict-of-laws rules, contractual terms and any relevant exclusions or reservations.

Does choosing Turkish law automatically exclude the CISG?

Not necessarily. Parties wishing to exclude the Convention should address exclusion expressly rather than relying solely on a general Turkish-law clause.

Can parties exclude the CISG?

Yes. Party autonomy allows the Convention to be excluded or its provisions varied within the applicable framework.

Does the CISG apply to service contracts?

It principally governs international sales of goods. Mixed goods-and-services contracts require closer analysis of the transaction.

Can a buyer terminate the contract because goods are defective?

Potentially, but avoidance is not automatically available for every defect. The seriousness of the breach and other available remedies must be examined.

Can lost profits be recovered?

Potentially, subject to the CISG’s damages rules, including proof of loss, causation, foreseeability and mitigation.

Does the CISG determine ownership of the goods?

The Convention does not comprehensively govern the effect of the contract on property rights in the goods.

Can the CISG apply in arbitration?

Yes. International arbitration can involve substantive claims governed by the CISG where the Convention is applicable.

What should a company do first when a CISG dispute arises in Turkey?

Determine whether the CISG applies before choosing the legal basis of the claim. Then preserve the contract, notices, inspection evidence, technical records, delivery documents and financial evidence and analyze each remedy under the Convention together with any domestic law governing matters outside its scope.

Client-Focused Legal Support for CISG and Cross-Border Trade Disputes

International sales disputes involving Turkey can raise complex questions concerning CISG applicability, defective goods, late delivery, non-payment, inspection and notice requirements, contract avoidance, price reduction, damages, lost profits, force majeure, governing law, jurisdiction and international arbitration.

Fırat Fesih Kaya Law Office assists foreign companies, exporters, manufacturers, international buyers and Turkish businesses in cross-border commercial disputes involving the CISG. Lawyer Fırat Fesih Kaya provides legal assistance in determining whether the Vienna Sales Convention applies, evaluating buyer and seller remedies, preparing contractual claims and defenses, and managing litigation or arbitration strategies involving international sales transactions.

Phone: +90 312 434 22 22

Mobile: +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