This article explains how awards made in Türkiye can be challenged, and what parties choosing Istanbul as a seat should know about annulment, enforcement and waiver.
Choosing Istanbul, or any other Turkish city, as the seat of arbitration has a consequence that parties often overlook at the drafting stage: the Turkish courts become the only forum in which the award can be set aside. An annulment action is not an appeal. The court does not ask whether the tribunal decided the dispute correctly; it reviews only a closed list of serious procedural and jurisdictional defects, together with arbitrability and public policy. The procedure is fast, the deadlines are short, and the rules differ in important ways depending on whether the arbitration is classified as international or domestic. For award creditors, the most significant feature is that, in international arbitration, simply filing an annulment action suspends enforcement in Türkiye. This article explains how annulment works under Turkish law and what it means for foreign parties on either side of an award.
1. International or Domestic? Why the Classification Matters
For arbitrations seated in Türkiye, the International Arbitration Law No. 4686 (IAL) applies where the dispute has a foreign element; otherwise, the arbitration provisions of the Code of Civil Procedure (CCP) apply. Under Article 2 of the IAL, a foreign element exists, for example, where:
- the parties are domiciled or habitually resident in different states;
- the seat is in a state other than that of one party's domicile;
- at least one shareholder of a party has brought foreign capital into Türkiye, or performance of the contract requires capital from abroad; or
- the contract or legal relationship involves the movement of capital or goods from one country to another.
One criterion is generally enough. As a result, a dispute between two Turkish companies can be an international arbitration, for example where one of them is the subsidiary of a foreign group or the contract involves imports or exports. The classification determines the time limit, the effect of annulment on enforcement and whether the parties can waive annulment at all.
2. Which Court, and How Long You Have
- International arbitration (IAL, Article 15): the action is brought before the regional court of appeal linked to the civil court determined under Article 3 of the IAL, by reference to the defendant's domicile, habitual residence or place of business in Türkiye, or in Istanbul if the defendant has none of these in Türkiye. The deadline is thirty days from notification of the award or of a decision on correction, interpretation or an additional award.
- Domestic arbitration (CCP, Article 439): the action is brought before the regional court of appeal at the seat. The deadline is one month from the same notifications.
Missing the deadline extinguishes the right to challenge. The regional court's decision can be appealed to the Court of Cassation. Foreign parties should arrange for the award to be reviewed by Turkish counsel as soon as it is notified, since translations, powers of attorney and apostilles can consume a significant part of a thirty-day window.
3. The Grounds for Annulment
The grounds are exhaustive and are not interpreted broadly. They closely track Article 34 of the UNCITRAL Model Law:
- incapacity of a party or invalidity of the arbitration agreement;
- failure to follow the agreed or statutory procedure for appointing the tribunal;
- failure to render the award within the time limit for the arbitration;
- an unlawful decision by the tribunal that it has or lacks jurisdiction;
- a decision on matters outside the arbitration agreement, failure to decide the whole claim, or excess of authority;
- a procedure not conducted in accordance with the parties' agreement or the law, where this affected the outcome;
- breach of the principle of equal treatment of the parties (and, under the CCP, of the right to be heard);
- non-arbitrability of the subject matter under Turkish law; and
- conflict with Turkish public policy.
Arbitrability and public policy are examined by the court of its own motion; the other grounds must be raised and proven by the applicant. Turkish courts interpret public policy narrowly. An error of law or a flawed assessment of evidence by the tribunal does not, on its own, breach public policy; the threshold is a clear violation of the fundamental principles of Turkish law and its sense of justice. Attempts to repackage disagreement with the merits as a procedural ground are generally rejected as an impermissible review of the merits.
4. The Key Difference: Suspension of Enforcement
This is where the two regimes diverge most sharply, and where foreign award creditors are most often surprised:
- International arbitration: filing an annulment action automatically suspends enforcement of the award in Türkiye, and the suspension continues through the appeal to the Court of Cassation. The award can be enforced only once it bears an enforceability endorsement, issued after the time limit has expired or the annulment action has been finally dismissed.
- Domestic arbitration: filing an annulment action does not suspend enforcement. The court may stay enforcement at the applicant's request, but only if security equal to the award amount is provided.
In practice, this means that an award debtor in an international arbitration seated in Türkiye can delay collection by months, sometimes years, simply by filing an annulment action, without posting security. Award creditors should plan for this from the outset, including by seeking interim relief over the debtor's assets in Türkiye and by pursuing enforcement abroad where the debtor holds assets. We discussed the interim relief options in arbitrations involving Türkiye in a separate article.
5. Waiving the Right to Annulment
The IAL offers a tool that many foreign parties do not know about. Where none of the parties is domiciled, habitually resident or has a place of business in Türkiye, the parties may waive the right to bring an annulment action, wholly or partly, by an express provision in the arbitration agreement or by a later written agreement. Even then, when an enforceability endorsement is requested, the court reviews arbitrability and public policy of its own motion, so these two grounds cannot effectively be waived.
For two foreign parties choosing Istanbul as a neutral seat, a waiver can remove the risk of a lengthy annulment action, and the automatic suspension of enforcement that comes with it. It also means giving up a safety net, so the decision should be made deliberately. The CCP contains no equivalent provision, and the validity of an advance waiver in domestic arbitration is doubtful.
6. What Happens After Annulment
Annulment does not automatically send the dispute to the state courts. Unless the parties agree otherwise, once the annulment decision becomes final they may reconstitute the tribunal, including by reappointing the same arbitrators, and set a new time limit. Re-arbitration is not available where the award was annulled for:
- international arbitration: incapacity or an invalid arbitration agreement, failure to render the award in time, or non-arbitrability;
- domestic arbitration: incapacity or an invalid arbitration agreement, non-arbitrability or public policy.
In those cases, the dispute is, as a rule, heard by the competent state court.
Annulment in Türkiye also has effects abroad. Under Article V(1)(e) of the New York Convention, courts in other Contracting States may refuse to enforce an award that has been set aside at the seat. Award creditors with assets to pursue outside Türkiye should therefore treat a Turkish annulment action as a risk to enforcement everywhere, not only in Türkiye.
7. Practical Strategy
For the award debtor:
- Establish immediately the date of notification and whether the IAL or the CCP applies, and calculate the deadline accordingly.
- Base each ground on concrete facts; do not present criticism of the merits as a procedural defect.
- Raise procedural objections during the arbitration and make sure they are recorded. Defects not objected to at the time are much harder to rely on later.
For the award creditor:
- In international arbitration, expect an annulment action to suspend enforcement in Türkiye, and consider interim relief over the debtor's assets while it is pending.
- Where the debtor has assets abroad, plan parallel enforcement under the New York Convention.
At the drafting stage:
- If neither party is based in Türkiye, consider whether an express waiver of annulment under the IAL suits your risk profile.
- A clear arbitration clause that follows institutional model wording prevents the invalidity and jurisdiction arguments most often raised in annulment actions. We discussed common drafting pitfalls under Turkish law in this article.
8. Conclusion
Annulment is the only recourse against an award made in Türkiye, but it is narrow and strictly time-limited. The key points can be summarised as follows:
- The IAL applies where there is a foreign element; a dispute between Turkish companies can qualify, for example through foreign shareholding or cross-border trade.
- The deadline is thirty days in international arbitration and one month in domestic arbitration, running from notification of the award.
- The grounds are exhaustive; the court does not review the merits, and public policy is read narrowly.
- In international arbitration, filing for annulment automatically suspends enforcement; in domestic arbitration, a stay requires security equal to the award.
- Where no party is based in Türkiye, annulment can be waived, except for arbitrability and public policy.
- An award annulled in Türkiye may also be refused enforcement abroad under the New York Convention.
For advice on annulment actions against arbitral awards, enforcement of awards in Türkiye and abroad, and choosing Istanbul as a seat of arbitration, please contact us at info@guzeloglu.legal.