International Arbitration in Turkey: Legal Framework, Procedure and Enforcement

International arbitration in Turkey has become an increasingly important dispute resolution mechanism for foreign investors, multinational companies, exporters, contractors, financial institutions and businesses engaged in cross-border transactions. Turkey’s geographical position between Europe, Asia, the Middle East and the Caucasus, combined with its diversified economy and extensive international trade relations, makes it a natural venue for disputes involving parties from different jurisdictions.

The Turkish legal system provides a comprehensive framework for international arbitration. This framework is primarily based on the Turkish International Arbitration Law No. 4686, international conventions to which Turkey is a party, the Turkish Code on Private International Law and International Civil Procedure No. 5718, and the rules of arbitration institutions such as the Istanbul Arbitration Centre, commonly known as ISTAC.

The International Arbitration Law No. 4686 was adopted on 21 June 2001 and published in the Official Gazette on 5 July 2001. It governs international arbitration proceedings where Turkey is selected as the seat of arbitration or where the parties or arbitral tribunal agree that the law will apply.

This article explains the legal framework, arbitration agreement requirements, conduct of proceedings, court assistance, interim measures, annulment of awards, recognition and enforcement procedures, and practical considerations for international arbitration in Turkey.

What Is International Arbitration?

International arbitration is a private dispute resolution method through which parties agree to submit their disputes to one or more independent arbitrators instead of national courts.

The arbitrators examine the parties’ claims, defences, evidence and legal arguments and issue a binding decision known as an arbitral award. Depending on the applicable legal regime and international conventions, the award may be recognised and enforced in numerous countries.

Arbitration is particularly suitable for international commercial disputes because it allows parties to determine fundamental procedural matters, including:

• The seat of arbitration
• The applicable substantive law
• The language of the proceedings
• The number and qualifications of arbitrators
• The arbitration institution or ad hoc rules
• The procedure for presenting evidence
• The confidentiality obligations of the parties
• The timetable for resolving the dispute

Unlike litigation before national courts, arbitration enables parties from different legal systems to select a neutral forum. It also allows them to appoint arbitrators with specialised knowledge of sectors such as construction, energy, banking, insurance, shipping, technology, telecommunications, international sales and corporate transactions.

Legal Framework for International Arbitration in Turkey

The legal framework applicable to arbitration in Turkey depends on factors such as the seat of arbitration, the existence of a foreign element, the nature of the dispute and the country in which enforcement is sought.

The principal sources of Turkish international arbitration law are:

1. Turkish International Arbitration Law No. 4686

The Turkish International Arbitration Law applies mainly where the dispute contains a foreign element and Turkey is the seat of arbitration. The parties may also expressly agree that the law will govern their arbitration in certain circumstances.

The law regulates essential matters such as:

• The definition of a foreign element
• The form and validity of arbitration agreements
• The appointment and challenge of arbitrators
• Interim measures and court assistance
• The conduct of arbitral proceedings
• The applicable substantive law
• The form and content of arbitral awards
• The time limit for rendering an award
• Applications to set aside an award
• Arbitration costs and fees

The law also restricts judicial intervention. Turkish courts may intervene in an arbitration only in circumstances permitted by the relevant legislation. This principle seeks to protect the autonomy of arbitral proceedings while preserving limited judicial supervision.

2. Turkish Code on Private International Law and International Civil Procedure

Law No. 5718 regulates the recognition and enforcement of foreign arbitral awards in Turkey, particularly where the New York Convention or another applicable international treaty does not govern the matter.

Articles 60 to 63 of Law No. 5718 establish the conditions, documents and refusal grounds applicable to foreign arbitral awards. They distinguish between recognition, which gives an award legal effect in Turkey, and enforcement, which allows compulsory execution against the debtor’s assets.

3. New York Convention

Turkey is a contracting state to the 1958 Convention on the Recognition and Enforcement of Foreign Arbitral Awards, commonly known as the New York Convention. Turkey deposited its instrument of accession on 2 July 1992.

Turkey applies the Convention subject to reciprocity and commercial reservations. Accordingly, Turkey applies the Convention to awards made in another contracting state and to disputes regarded as commercial under Turkish law.

The New York Convention significantly facilitates the enforcement of foreign arbitral awards in Turkey and Turkish arbitral awards abroad. However, enforcement is not entirely automatic. The party seeking enforcement must apply to the competent national court and submit the required documents.

4. Institutional Arbitration Rules

Parties may submit disputes to an arbitration institution. One of the most significant institutions in Turkey is the Istanbul Arbitration Centre.

ISTAC administers both domestic and international disputes. Its rules include provisions concerning ordinary arbitration, expedited arbitration, emergency arbitrators, appointments, costs and procedural administration. An ISTAC arbitration requires a valid agreement referring the dispute to arbitration under the ISTAC Rules.

Parties may also agree to arbitration under the rules of another national or international institution or conduct an ad hoc arbitration without institutional administration.

When Does an Arbitration Have a Foreign Element?

The existence of a foreign element is essential in determining whether the Turkish International Arbitration Law applies.

Under Law No. 4686, a foreign element may exist where:

• The parties to the arbitration agreement have their domiciles or habitual residences in different states;
• The agreed seat of arbitration is located outside the state in which the parties are domiciled or habitually resident;
• A substantial part of the contractual obligations will be performed in another state;
• The place most closely connected to the dispute is located in another state;
• Foreign capital has been brought into Turkey in connection with the underlying contract;
• Foreign credit or security arrangements are required;
• The underlying transaction involves the movement of goods or capital between different countries.

Therefore, an arbitration may qualify as international even where both parties are Turkish companies. For example, a contract involving foreign financing, cross-border delivery obligations or international capital movements may contain the necessary foreign element.

Scope of the Turkish International Arbitration Law

The Turkish International Arbitration Law generally applies where Turkey is the seat of arbitration and the dispute contains a foreign element. The parties or the arbitral tribunal may also agree to apply the law in circumstances permitted by the legislation.

Certain provisions concerning arbitration objections and interim measures may remain relevant even when the seat of arbitration is outside Turkey.

However, not every dispute may be resolved by arbitration. The International Arbitration Law does not apply to disputes concerning rights in rem over immovable property located in Turkey or disputes that are not subject to the parties’ free disposition.

Arbitrability under Turkish Law

Arbitrability refers to whether a particular type of dispute may legally be submitted to arbitration.

As a general principle, commercial and contractual disputes involving rights that the parties may freely dispose of are capable of settlement by arbitration. These may include disputes arising from:

• International sale and distribution agreements
• Construction and infrastructure contracts
• Share purchase agreements
• Joint ventures and shareholders’ agreements
• Licensing and technology contracts
• Energy supply agreements
• Banking and finance transactions
• Insurance and reinsurance agreements
• Maritime and transportation contracts
• Agency and franchise agreements

By contrast, disputes involving matters reserved exclusively for state courts or public authorities may not be arbitrable. Rights in rem relating to immovable property located in Turkey are expressly excluded from the scope of the International Arbitration Law.

Public law matters, criminal responsibility, certain family law disputes and other rights that parties cannot freely waive or settle will generally fall outside the scope of arbitration.

Parties should conduct an arbitrability analysis before inserting an arbitration clause into a contract. A clause covering a non-arbitrable matter may create jurisdictional disputes and cause difficulties at the enforcement stage.

Arbitration Agreements under Turkish Law

An arbitral tribunal derives its jurisdiction from the parties’ consent. Therefore, the arbitration agreement is the legal foundation of the proceedings.

An arbitration agreement may take the form of:

• An arbitration clause contained in the main contract; or
• A separate agreement executed before or after the dispute arises.

The agreement may cover all or certain disputes arising from a defined legal relationship. The subject matter must be sufficiently identifiable. A broadly worded clause may cover contractual claims and, depending on its wording, related non-contractual claims.

Written Form Requirement

Under the International Arbitration Law, an arbitration agreement must be in writing. The written-form requirement may be satisfied through:

• A document signed by the parties;
• An exchange of letters or other written communications;
• Electronic communications that provide a record of the agreement;
• A statement of claim alleging the existence of an arbitration agreement where the other party does not deny it;
• Incorporation by reference to another document containing an arbitration clause, provided that the reference makes the clause part of the contract.

The substantive validity of the arbitration agreement is determined by the law chosen by the parties for that agreement. In the absence of such a choice, Turkish law may apply under the conditions established by Law No. 4686.

Separability of the Arbitration Clause

An arbitration clause is treated independently from the main contract. Consequently, an allegation that the underlying contract is invalid, terminated or rescinded does not necessarily invalidate the arbitration clause.

This principle prevents a party from avoiding arbitration merely by challenging the validity of the main contract. However, a direct challenge to the existence, authenticity or validity of the arbitration agreement itself must be examined separately.

Arbitration Objection Before Turkish Courts

Where a party commences court proceedings despite the existence of a valid arbitration agreement, the opposing party may raise an arbitration objection.

If the competent Turkish court concludes that the dispute is covered by a valid and enforceable arbitration agreement, it may dismiss the court action on procedural grounds and direct the parties to arbitration.

The objection should be raised in accordance with applicable procedural deadlines. A party that litigates the merits without timely invoking the arbitration clause may face arguments that it has waived or lost the right to rely on arbitration.

Drafting an Effective Arbitration Clause

A poorly drafted arbitration clause may cause significant procedural disputes. Expressions such as “the parties may apply to arbitration” or clauses referring simultaneously to arbitration and national courts without a clear hierarchy can create uncertainty.

A well-drafted international arbitration clause should address at least:

• The disputes covered by arbitration;
• The selected arbitration institution and rules;
• The seat of arbitration;
• The number of arbitrators;
• The language of the proceedings;
• The governing law of the main contract;
• Where appropriate, the law governing the arbitration agreement;
• Confidentiality obligations;
• Emergency and interim relief procedures;
• The method of service and communication.

A practical ISTAC-based clause may read as follows:

“Any dispute arising out of or in connection with this agreement, including any question regarding its existence, validity, interpretation, performance or termination, shall be finally resolved by arbitration under the Istanbul Arbitration Centre Arbitration Rules. The seat of arbitration shall be Istanbul, Turkey. The tribunal shall consist of three arbitrators. The language of arbitration shall be English. The substantive law governing the agreement shall be Turkish law.”

ISTAC’s official model clause also recommends that parties specify the seat, language, number of arbitrators and governing law and consider whether emergency arbitrator provisions should apply.

Seat of Arbitration

The seat of arbitration is one of the most important elements of an arbitration clause.

The seat determines the procedural law governing the arbitration and the courts that exercise supervisory jurisdiction. Selecting Istanbul as the seat generally means that Turkish arbitration legislation will govern procedural matters and Turkish courts will have jurisdiction over applications such as interim judicial assistance or setting aside the award.

The legal seat should not be confused with the physical location of hearings. The tribunal may hold hearings, meetings or inspections in another city or country without legally changing the seat.

When choosing the seat, parties should consider:

• The arbitration law of the jurisdiction;
• The degree of court support for arbitration;
• The available grounds for setting aside awards;
• The country’s participation in the New York Convention;
• The efficiency of local courts;
• The availability of experienced arbitration counsel and arbitrators.

Language of Arbitration

The parties are free to determine the language or languages of the arbitration.

Under Law No. 4686, proceedings may be conducted in Turkish or in an official language of a state recognised by Turkey. Where the parties have not agreed on the language, the arbitral tribunal determines it.

The selected language generally applies to pleadings, hearings, written evidence, expert reports and the arbitral award. The tribunal may require translations of documents submitted in another language.

For international contracts involving Turkish and foreign parties, English is frequently selected. However, parties should consider translation costs, witness language, governing law and the language of the underlying contractual documentation.

Appointment of Arbitrators

Parties may agree on a sole arbitrator or a panel of arbitrators. A sole arbitrator may be appropriate for disputes of moderate value or limited complexity. A three-member tribunal may be preferable for high-value, technical or strategically important disputes.

The arbitration agreement or institutional rules should establish the appointment procedure. In a three-member tribunal, each party will commonly appoint one arbitrator, and the two party-appointed arbitrators or the relevant institution will select the presiding arbitrator.

Arbitrators must be independent and impartial. Circumstances giving rise to justified doubts about an arbitrator’s independence or impartiality may provide grounds for challenge.

Before accepting an appointment, arbitrators should disclose relationships, financial interests or professional circumstances that may reasonably affect their impartiality. Parties should also conduct conflict checks before making nominations.

Conduct of International Arbitration Proceedings

Arbitration proceedings are shaped by party autonomy. The parties may agree on institutional rules, procedural timetables, document production procedures and hearing formats.

Subject to mandatory legal requirements, the tribunal will typically establish the procedure through an initial procedural meeting and a procedural order.

A standard international arbitration may involve:

1. Filing of the request for arbitration;
2. Submission of the response and possible counterclaims;
3. Constitution of the arbitral tribunal;
4. Preliminary procedural conference;
5. Exchange of statements of claim and defence;
6. Submission or production of documentary evidence;
7. Witness statements and expert reports;
8. Evidentiary hearing;
9. Post-hearing submissions;
10. Issuance of the final award.

The parties must be treated equally and given a reasonable opportunity to present their claims and defences. A material violation of equality or the right to be heard may later constitute a ground for setting aside or refusing enforcement of the award.

Evidence and Expert Examination

The arbitral tribunal has substantial flexibility regarding evidence.

The tribunal may examine contractual documents, accounting records, correspondence, electronic data, technical reports, witness statements and expert evidence. Depending on the applicable rules, it may order a party to produce documents relevant to the dispute.

Under the Turkish International Arbitration Law, a tribunal may appoint one or more experts and may request court assistance in collecting evidence where necessary. The tribunal must also consider the provisions of the contract and relevant commercial usages when deciding the dispute.

In technically complex disputes, expert evidence may be decisive. Construction arbitration, for example, may require delay, quantum, engineering and accounting experts. Parties should ensure that expert reports clearly explain methodology, supporting documents and conclusions.

Applicable Substantive Law

The parties may choose the substantive law governing their contractual relationship.

Under Law No. 4686, the tribunal decides the merits in accordance with the rules of law selected by the parties. A reference to the law of a state is generally understood as a reference to its substantive law unless the parties provide otherwise.

Where the parties have not made a choice, the tribunal applies the substantive law of the state most closely connected to the dispute. The tribunal also considers the contract’s provisions and relevant trade usages.

The tribunal may decide according to equity or act as an amiable compositeur only where the parties have expressly authorised it to do so.

The governing law clause and arbitration clause should be drafted separately. Selecting Istanbul as the seat does not automatically mean that Turkish substantive law governs the underlying contract.

Interim Measures and Judicial Assistance

International disputes may require urgent measures before the tribunal is constituted or while proceedings are pending.

A party may need to:

• Preserve assets;
• Prevent disposal of property;
• Protect evidence;
• Maintain the status quo;
• Secure goods or documents;
• Prevent the calling of a guarantee;
• Obtain temporary performance of an obligation.

Depending on the circumstances and applicable rules, interim measures may be requested from the arbitral tribunal, an emergency arbitrator or a competent court.

Court applications for interim protection do not necessarily constitute a waiver of the arbitration agreement. Nevertheless, the relationship between tribunal-ordered relief and judicial enforcement should be analysed carefully.

Parties seeking interim relief must act promptly and submit specific evidence demonstrating urgency, risk of harm and the legal basis of the request.

Time Limit for Rendering an Award

Unless the parties agree otherwise, the Turkish International Arbitration Law provides a default period of one year for rendering an award. The period generally begins from the appointment of the sole arbitrator or the first meeting of the arbitral tribunal.

The parties may agree to extend the period. Where no agreement can be reached, an extension may be requested from the competent court under the conditions prescribed by law.

In institutional arbitration, the applicable institutional rules and procedural timetable must also be examined. Parties should avoid unnecessary delay, because an award rendered outside the authorised time may face an annulment challenge.

Arbitral Awards

An arbitral award should clearly identify:

• The parties;
• The arbitration agreement;
• The tribunal;
• The claims and defences;
• The reasoning;
• The tribunal’s conclusions;
• The allocation of costs;
• The date and seat of arbitration;
• The signatures of the arbitrators.

The tribunal may issue a final award resolving the entire dispute or, where appropriate, partial, interim or additional awards.

After the award is issued, the parties may be entitled to request correction of clerical or computational errors, interpretation of a specific part of the award or an additional award concerning claims omitted from the final decision, depending on the applicable legislation and arbitration rules.

Setting Aside an Arbitral Award in Turkey

An award rendered in an arbitration seated in Turkey is not ordinarily challenged through a full appeal on the merits. The principal legal remedy is an application to set aside the award.

The court does not reconsider the entire dispute as if it were an appellate tribunal. Judicial review is limited to statutory grounds.

Grounds for setting aside may include:

• Incapacity of a party to the arbitration agreement;
• Invalidity of the arbitration agreement;
• Failure to comply with the agreed arbitrator appointment procedure;
• The award being rendered after the permitted period;
• An incorrect decision regarding the tribunal’s jurisdiction;
• The award exceeding the scope of the arbitration agreement;
• Failure to decide all claims within the tribunal’s authority;
• Material procedural violations affecting the merits;
• Violation of equality or the right to be heard;
• Non-arbitrability of the dispute under Turkish law;
• Conflict with Turkish public policy.

Under Article 15 of Law No. 4686, the setting-aside application must generally be filed within 30 days following notification of the award or the relevant correction, interpretation or additional award decision. Filing the application suspends enforcement of the award under the statutory regime.

Following the 2018 amendments, setting-aside applications under the International Arbitration Law are brought before the territorially competent Regional Court of Appeal. Decisions may be subject to review before the Court of Cassation in accordance with the applicable procedural rules.

Because the deadline is relatively short, a party considering an annulment action should immediately analyse the award, procedural history, notifications, tribunal constitution and potential public policy issues.

Recognition and Enforcement of Foreign Arbitral Awards in Turkey

A foreign arbitral award does not automatically lead to compulsory execution in Turkey. The successful party must obtain a recognition or enforcement decision from the competent Turkish court.

Recognition may be sufficient where the award will be relied upon as conclusive evidence or as a basis for res judicata. Enforcement is required where the creditor seeks compulsory execution against assets in Turkey.

Enforcement under the New York Convention

Where the award was made in another New York Convention contracting state and the dispute is commercial under Turkish law, the Convention will generally govern the enforcement application.

The party seeking enforcement must ordinarily submit:

• The original award or a duly certified copy;
• The original arbitration agreement or a duly certified copy;
• Certified Turkish translations where required.

The party opposing enforcement may rely only on the limited refusal grounds contained in the Convention. These include invalidity of the arbitration agreement, lack of proper notice, inability to present the case, excess of jurisdiction, procedural irregularities, the award not being binding or having been set aside, non-arbitrability and public policy.

Enforcement under Law No. 5718

Where the New York Convention does not apply, Articles 60 to 63 of Law No. 5718 may govern recognition and enforcement.

Under Article 60, a foreign arbitral award that is final and enforceable or binding on the parties may be enforced in Turkey. Jurisdiction may be based on the parties’ agreement or, in the absence of such an agreement, the respondent’s domicile, habitual residence or assets in Turkey.

Article 61 requires the applicant to provide the arbitration agreement, the arbitral award and certified translations.

Article 62 contains grounds on which enforcement may be refused, including:

• Absence or invalidity of the arbitration agreement;
• Non-arbitrability;
• Violation of Turkish public policy;
• Lack of proper notice;
• Inability to present a defence;
• Irregular constitution of the tribunal;
• Departure from the agreed procedure;
• The award exceeding the scope of the arbitration agreement;
• The award not being binding, enforceable or having been set aside.

The same framework applies, with necessary adjustments, to recognition applications.

Public Policy in Enforcement Proceedings

Public policy is one of the most frequently invoked defences against enforcement. However, it should not be interpreted as permission to review the merits of the arbitral award.

A Turkish court will generally focus on whether recognition or enforcement would produce a result clearly incompatible with fundamental principles of Turkish law, basic procedural guarantees, morality or the essential values of the Turkish legal order.

An incorrect interpretation of the contract or ordinary error in applying substantive law should not automatically amount to a public policy violation. Nevertheless, each case depends on the nature of the dispute, the award and its consequences in Turkey.

Investment Arbitration and Turkey

International commercial arbitration should be distinguished from investor-state arbitration.

Commercial arbitration generally arises from an arbitration clause between private parties. Investment arbitration may arise from an investment treaty, national investment legislation or an investment contract between an investor and a state.

Turkey signed the Convention on the Settlement of Investment Disputes between States and Nationals of Other States on 24 June 1987 and deposited its instrument of ratification on 3 March 1989. Therefore, disputes involving qualifying foreign investments may, where valid consent and jurisdictional requirements exist, be submitted to arbitration under the ICSID framework.

The existence of an investment in Turkey does not itself create a right to ICSID arbitration. The investor must establish consent, protected investor status, a qualifying investment and compliance with the applicable treaty or contractual requirements.

Advantages of International Arbitration in Turkey

International arbitration in Turkey may offer several advantages:

Neutrality

Parties from different countries may select a neutral seat, neutral arbitrators and a neutral procedural framework.

Enforceability

Awards may benefit from the New York Convention’s international enforcement system.

Expertise

Parties may appoint arbitrators with experience in a specific legal field or industry.

Procedural Flexibility

The parties may determine language, timetable, hearing format and evidentiary procedures.

Privacy

Arbitration hearings are not generally open to the public. However, confidentiality should not be assumed to be absolute. Parties should regulate confidentiality through the arbitration clause, institutional rules, procedural orders or a separate confidentiality agreement.

Finality

Arbitral awards are generally not subject to a broad merits appeal. Judicial review is limited to specific annulment or enforcement grounds.

Risks and Practical Challenges

Arbitration also involves potential disadvantages:

• Arbitrator and institutional fees may be substantial;
• Complex proceedings can become lengthy;
• Multiparty and multicontract disputes may create jurisdictional difficulties;
• Interim relief may require coordination with national courts;
• An ambiguous arbitration clause may lead to parallel proceedings;
• Enforcement can be delayed by annulment or public policy objections;
• Limited appeal rights reduce opportunities to correct substantive errors.

The decision to choose arbitration should therefore be based on the transaction value, parties’ locations, asset structure, sector, confidentiality needs and potential enforcement jurisdictions.

Frequently Asked Questions About International Arbitration in Turkey

Is an arbitration clause enforceable in Turkey?

Yes. A written arbitration clause covering an arbitrable dispute is generally enforceable. The clause should clearly demonstrate the parties’ intention to submit the dispute to arbitration.

Can a Turkish company and a foreign company choose Istanbul as the seat?

Yes. Parties to an international commercial contract may choose Istanbul or another location in Turkey as the legal seat of arbitration.

Can arbitration proceedings in Turkey be conducted in English?

Yes. The parties may agree that English will be the language of arbitration, subject to the applicable law and arbitration rules.

Can a foreign arbitral award be enforced against assets in Turkey?

Yes. A qualifying foreign award may be recognised and enforced through the competent Turkish court under the New York Convention or Law No. 5718.

Can Turkish courts review the merits of an arbitral award?

As a rule, courts dealing with annulment or enforcement should not conduct a full review of the merits. Their examination is limited to statutory grounds such as jurisdiction, due process, arbitrability and public policy.

How long is the deadline for setting aside an international arbitral award?

Under the Turkish International Arbitration Law, the application must generally be filed within 30 days following notification of the award or the relevant post-award decision.

Is arbitration confidential in Turkey?

Arbitration proceedings are private, but the extent of confidentiality depends on the parties’ agreement, applicable institutional rules and procedural orders. A detailed confidentiality provision is recommended for sensitive disputes.

Conclusion

International arbitration in Turkey provides an effective framework for resolving cross-border commercial disputes. The Turkish International Arbitration Law, the New York Convention, Law No. 5718 and institutional rules such as the ISTAC Rules collectively create a modern legal environment for arbitration.

Nevertheless, the effectiveness of arbitration depends heavily on careful planning. Parties should draft a clear arbitration clause, select an appropriate seat, determine the governing law and language, establish the tribunal structure and consider interim relief and enforcement from the beginning of the transaction.

Once a dispute arises, strict attention must be paid to jurisdictional objections, procedural deadlines, evidence, tribunal appointments and the location of the opposing party’s assets. Setting-aside and enforcement proceedings also require specialised analysis because Turkish courts exercise only limited but significant supervision over arbitral awards.

Businesses entering into international contracts connected with Turkey should obtain legal advice before finalising arbitration clauses or commencing proceedings. A properly designed arbitration mechanism can reduce jurisdictional uncertainty, protect commercial interests and improve the international enforceability of the final decision.

Legal Disclaimer: This article is intended for general informational purposes only and does not constitute legal advice. Arbitration laws, institutional rules and judicial practice may change. Legal advice should be obtained based on the particular contract, dispute, seat of arbitration and enforcement jurisdiction.