Enforcing UK High Court Judgments in Turkey: 2026 Commercial Guide

Securing a monetary judgment in the English High Court of Justice — whether through the Commercial Court, the Chancery Division, or the King's Bench — is often only half the battle. When the judgment debtor holds substantial assets, real estate holdings, bank accounts, or corporate shareholdings in Türkiye, the creditor must navigate the Turkish private international law framework to convert an English order into enforceable Turkish execution writs (icra takibi).

Under Turkish law, foreign court judgments possess no direct executory force within the sovereign territory of Türkiye. To attach assets, freeze commercial bank accounts, or liquidate Turkish company equity, the judgment creditor must initiate an independent civil enforcement action known as a tenfiz davası before the specialized Turkish Commercial Court of First Instance (Asliye Ticaret Mahkemesi). Istanbul Attorneys regularly acts for UK institutional lenders, London commercial litigation boutiques, and multinational corporations in high-stakes enforcement proceedings across Istanbul, Ankara, and Izmir.

Key Takeaways: Enforcing UK High Court Orders in Turkey

• No Bilateral Treaty, But Settled De Facto Reciprocity: Turkey is not a signatory to the 2019 Hague Judgments Convention. However, Turkish courts consistently recognize de facto reciprocity with England & Wales under MÖHUK Article 54(1)(a) because English courts enforce Turkish money judgments under common law principles (Dicey, Morris & Collins rule).
• Brexit Has Zero Negative Impact: The UK's departure from the European Union did not alter the UK-Turkey judicial enforcement framework. Turkey was never part of the Brussels I Recast or Lugano regimes; reciprocity has always rested on MÖHUK Law No. 5718.
• Prohibition on Merits Review (Révision au Fond): Under Article 55 of MÖHUK, Turkish courts cannot re-examine the factual or substantive legal merits of the High Court's findings. Review is strictly confined to four statutory formal criteria.
• Mandatory Finality & Apostille: Turkish judges will not accept unsealed drafts or interim worldwide freezing orders (WFOs). A certified copy under CPR Part 74, an explicit certificate of finality, and an FCDO Hague Apostille are mandatory prerequisites.
• Court Fee Structure: Tenfiz actions carry proportional court fees under Tariff No. 1 of Fees Law No. 492 (approx. 6.831% of the judgment debt, with one-quarter payable upon initial filing and fully recoverable from the debtor upon final judgment).

The Statutory Architecture: MÖHUK Law No. 5718

The enforcement of foreign court judgments in Türkiye is governed by Chapter Two (Articles 50 to 59) of the Turkish Code on Private International Law and International Civil Procedure (Law No. 5718, known as MÖHUK). To obtain an enforcement decree, the High Court judgment must satisfy the four cumulative conditions set out in Article 54:

1. Reciprocity (MÖHUK Article 54/1-a)

The court must determine whether reciprocity exists between Türkiye and the jurisdiction where the judgment was rendered. Under Turkish jurisprudence, reciprocity may be established via three alternative avenues: (i) an international multilateral or bilateral treaty, (ii) statutory provisions in the foreign state's legislation, or (iii) de facto judicial practice. Between the UK and Türkiye, the Turkish Court of Cassation (Yargıtay 11. Hukuk Dairesi, E. 2016/1422, K. 2017/3890) has established that de facto reciprocity exists because English courts routinely enforce final monetary judgments of Turkish civil courts under the common law debt enforcement doctrine.

2. Absence of Turkish Exclusive Jurisdiction (MÖHUK Article 54/1-b)

The judgment must not concern a subject matter falling within the exclusive jurisdiction of Turkish courts. Under Turkish procedural law, matters involving rights in rem over Turkish real estate (taşınmaz üzerindeki ayni haklar, Article 12 HMK) and certain corporate dissolution matters are strictly reserved for Turkish courts. A High Court judgment ordering payment of a debt or damages arising from a commercial contract, loan agreement, guarantee, or charter party avoids this bar entirely.

3. Compatibility with Turkish Public Policy (MÖHUK Article 54/1-c)

The substantive outcome of the foreign judgment must not clearly violate Turkish public policy (kamu düzeni). The Turkish Court of Cassation maintains a restrictive interpretation of public policy in international private law: a foreign decision does not breach public policy merely because Turkish substantive law would have reached a different result. Only judgments that violate fundamental constitutional rights, core notions of justice, or non-derogable public interests will be denied enforcement. Standard commercial default interest, contractual indemnity clauses, and standard commercial damages are routinely upheld.

4. Compliance with Due Process & Defense Rights (MÖHUK Article 54/1-ç)

This is the battleground where cross-border enforcement is most frequently contested. If the defendant was not properly summoned before the English High Court in accordance with the laws of the forum, or if the judgment was rendered in default without valid international service, and the defendant raises this objection before the Turkish court, enforcement will be denied. UK claimants who served Turkish resident defendants by informal email or courier — without utilizing the formal central authority channels under the 1965 Hague Service Convention — expose their enforcement action to serious risk of dismissal.

Procedural Roadmap: From London High Court to Turkish Bailiff

Can You Enforce an English Worldwide Freezing Order (WFO) in Turkey?

A frequent inquiry from UK litigators is whether an interim freezing injunction (Mareva or Worldwide Freezing Order) granted by the High Court can be recognized and enforced against Turkish assets before the substantive trial concludes.

The answer under Turkish law is categorically no. Article 50 of MÖHUK specifies that only final court judgments (kesinleşmiş ilâmlar) are capable of enforcement. An interim order or injunction lacks definitive res judicata status. To freeze Turkish bank accounts, vessel assets, or commercial receivables during an active London trial, the claimant's Turkish counsel must file an independent application for a precautionary attachment (ihtiyati haciz) or interim injunction (ihtiyati tedbir) directly before the competent Turkish civil courts under Articles 257–268 of the Turkish Execution and Bankruptcy Law (Law No. 2004).

Strategic Guidance for UK Claimants & Solicitors

To ensure swift and unimpeded enforcement of High Court orders across Turkish jurisdictions, adhere to these three core rules from day one of your London proceedings:

1. Serve Via the Hague Service Convention: If your defendant is domiciled or resident in Türkiye, effect service through the Turkish Ministry of Justice central authority route. Do not rely exclusively on English CPR alternative service orders by email, as this exposes the resulting judgment to MÖHUK Art. 54(1)(ç) defense objections in Istanbul.
2. Explicit Finality Certification: Request the High Court associate or registry officer to issue a formal Certificate of Non-Appeal / Finality specifically certifying that the statutory time limit for appealing the judgment has lapsed.
3. Pre-Enforcement Asset Tracing: Conduct targeted Turkish corporate asset searches — trade registry shareholdings, real estate parcels, and bank branches — before filing the tenfiz petition so that precautionary attachments can be registered immediately upon judgment.

Common Questions About Enforcing UK High Court Judgments in Turkey

Can an English High Court judgment be enforced directly in Turkey?

No. An English High Court judgment cannot be executed directly through Turkish bailiffs. A formal enforcement lawsuit (tenfiz davası) must be filed before the competent Turkish Commercial Court of First Instance under Law No. 5718 (MÖHUK). Once the Turkish court issues an enforcement decree and it becomes final, asset attachment proceeds.

Does Brexit affect the enforcement of UK judgments in Turkey?

No. Turkey has never been an EU member state, so the EU Brussels I Recast Regulation never applied between the UK and Turkey. Post-Brexit enforcement continues smoothly under Turkish Private International Law (MÖHUK 5718) and established de facto reciprocity recognized by the Turkish Court of Cassation (Yargıtay).

What documents are strictly required from the English High Court?

You must provide: (1) An official certified copy of the High Court judgment issued under CPR Part 74, (2) An official certificate of finality confirming no appeal is pending and appeal time limits have expired, (3) An Apostille certificate issued by the UK Foreign, Commonwealth & Development Office (FCDO) under the 1961 Hague Convention, and (4) A sworn Turkish translation notarised in Turkey.

Will the Turkish judge review the merits of the UK High Court case?

No. Turkish courts are strictly prohibited from reviewing the substantive merits of the foreign decision (révision au fond prohibition). The Turkish court only examines statutory formal criteria under MÖHUK Article 54: reciprocity, due process service, public policy compatibility, and absence of Turkish exclusive jurisdiction.

This guide is general information on Turkish law, not legal advice on your own matter. Rules and practice change; check the position before you act.