Enforcing Bank Guarantee Letters in Turkey: Injunctions Against Unfair Encashment (HMK Art. 389) and TBK Art. 128 Liabilities

Comprehensive legal guide to enforcing bank guarantee letters in Turkey, obtaining emergency preliminary injunctions against fraudulent calls under HMK 389, and bank independent payment liabilities under TBK 128.

Av. Onur ÇalışıcıPublished 31 August 2026 · 8 min read
Engraving: the path from a ribboned guarantee letter to a columned bank building is blocked by a red-striped barrier, beside a Turkish tea set.

In brief

  1. Under TCO Art. 128, bank guarantee letters constitute autonomous guarantee contracts, preventing banks from invoking underlying contract defenses to withhold payment.
  2. Calling a guarantee despite full contractual performance constitutes a manifest abuse of rights under Turkish Civil Code Art. 2.
  3. Contractors facing abusive drawdowns can obtain emergency preliminary injunctions (İhtiyati Tedbir) under CPC Art. 389 from Commercial Courts blocking payment.
  4. Under HMK Art. 392/1 the petitioner must as a rule provide counter-security; the statute sets no fixed rate, and the court may waive security, giving its reasons, where the request rests on an official document or other conclusive evidence or the circumstances so require.
  5. Banks paying in violation of a court injunction forfeit their right of recourse; wrongful encashments can be recovered via Restitution Lawsuits (İstirdat Davası).
In front of a columned bank, a guarantee letter envelope sits at the start of a path to stacks of coins, blocked by a closed barrier.
When a guarantee is called unfairly, the aim is to stop it being turned into cash.

In international construction, energy infrastructure, and high-value supply agreements in Turkey, Bank Guarantee Letters (Performance Bonds, Advance Payment Bonds, and Demand Guarantees) represent the primary security instrument for commercial creditors. However, when a beneficiary attempts an abusive, fraudulent, or bad-faith call (unfair encashment) despite full contractual performance, corporate contractors face catastrophic liquidity risks. This guide provides a strategic roadmap on the independent nature of bank guarantees under Article 128 of the Turkish Code of Obligations (TCO / TBK) and emergency preliminary injunctions (İhtiyati Tedbir) under Article 389 of the Turkish Civil Procedure Code (CPC / HMK).

Under Turkish legal doctrine and statutory practice, a bank guarantee letter constitutes a Contract to Guarantee the Performance of a Third Party pursuant to Article 128 of the Turkish Code of Obligations No. 6098.

The defining legal characteristic of a bank guarantee is its autonomous and non-accessory (primary) nature. Distinct from suretyship contracts (kefalet):

  • Inadmissibility of Contractual Defenses: The issuing bank cannot raise defenses or objections arising from the underlying commercial relationship (such as breach, termination, or set-off between applicant and beneficiary) to withhold payment.
  • First Demand Mechanism: Where the guarantee contains a ‘payable immediately upon first written demand’ covenant, the bank must pay without requiring the beneficiary to prove default or judicial adjudication.

2. Abusive and Fraudulent Encashment under Turkish Civil Code Art. 2

Although the bank’s obligation is autonomous, the beneficiary’s right to call the guarantee is strictly circumscribed by the overarching doctrine of Good Faith and Prohibition of Abuse of Rights under Article 2 of the Turkish Civil Code (TCC / TMK).

A demand is legally classified as abusive (haksız nakde çevirme) under the following actionable scenarios:

  1. Complete Contractual Performance: The contractor has fully executed the underlying obligations, confirmed by statutory final acceptance certificates (kesin kabul).
  2. Beneficiary’s Own Breach: The beneficiary prevented performance through its own default and opportunistically calls the bond.
  3. Fraud and Document Forgery: Presentation of falsified draw-down certificates or fraudulent default notices.

3. Securing Emergency Preliminary Injunctions under CPC Art. 389 (İhtiyati Tedbir)

The most immediate and critical defense available to an affected contractor is to petition the competent Turkish Commercial Court (Asliye Ticaret Mahkemesi) for an Urgent Preliminary Injunction Prohibiting the Bank from Executing Payment under Articles 389 et seq. of the Civil Procedure Code.

A closed barrier has come down across the path from a columned bank to stacks of coins, with scales, a red-bound book and a blank guarantee envelope.
An urgent preliminary injunction from the court can halt payment under the guarantee.

Statutory requirements to secure a payment-blocking injunction in Turkey:

  • Prima Facie Evidence (Yaklaşık İspat): The applicant must present clear documentary evidence (acceptance protocols, expert determinations, formal notices) establishing that the call constitutes a manifest abuse of rights.
  • Security Deposit (Counter-Security / HMK Art. 392): The petitioner must as a rule deposit security, in cash or by counter-guarantee, against the damage the beneficiary and third parties may suffer if the injunction proves unjustified. The statute sets no rate: the court fixes the amount, and it may dispense with security, giving its reasons, where the request rests on an official document or other conclusive evidence.

4. Bank Guarantee Types and Dispute Risk Matrix

Standard bank guarantee instruments in cross-border Turkish transactions and their corresponding litigation profiles:

Guarantee StructureCommercial PurposeStatutory BasisInjunction Success Probability
Bid Bond (Geçici Teminat)Prevents withdrawal of tender submissionsPublic Procurement Law / TBK 128Low (Strict tender criteria)
Performance Bond (Kesin Teminat)Secures complete and timely executionTCO Art. 128High (Where completion certificates exist)
Advance Payment Bond (Avans)Secures recovery of unamortized mobilization fundsTCO Art. 128Very High (Upon proof of advance offset)
Counter-Guarantee (Kontrgaranti)Foreign bank instruction to Turkish correspondentURDG 758 / PIL Law 5718Complex (Requires cross-border jurisdictional strategy)

5. Bank Obligations and Liability for Wrongful Payment

The issuing bank is held to a strict standard of Formal Document Examination. If the beneficiary’s draw-down request fails to comply strictly with the terms of the guarantee (e.g., expiry date, required wording, authorized corporate signatories), the bank is legally obligated to reject the call.

Once a valid HMK Art. 389 injunction order is formally served upon the bank, any disbursement made by the bank is unlawful. A bank paying in violation of a court order forfeits its statutory recourse against the corporate applicant.

Stacks of coins from a columned bank building being weighed in one pan of a pair of scales.
The bank's liability for making a wrongful payment.

6. Post-Encashment Restitution (İstirdat) and Commercial Tort Claims

If a fraudulent call is completed before an injunction is obtained, the affected party must immediately initiate a Restitution Lawsuit (İstirdat Davası) and a Tort Compensation Claim before the Commercial Court.

Recoverable damages include:

  • Principal Restitution: Complete refund of the encashed guarantee sum with maximum statutory commercial default interest accruing from the date of payment.
  • Banking Fees and Credit Limit Impairment: Recovery of penalty commissions, loan interest, and financial holding costs imposed by the issuing bank.
  • Commercial Reputation Damages: Compensation for material and moral commercial injury resulting from wrongful default records.

7. Counter-Security: What HMK Art. 392 Actually Says

Counter-security is the most commonly misstated element of an injunction application. Article 392/1 of the Code of Civil Procedure (HMK) sets the rule: the party requesting the interim measure must provide security against the probable damages the other party and third parties would suffer if the applicant turns out to be wrong.

The same paragraph, however, contains two exceptions. Where the request rests on an official document or on other conclusive evidence, or where the situation and circumstances so require, the court may decide not to take security at all, provided it states its reasons expressly. A party benefiting from legal aid is not required to provide security.

The practical consequence is this: the statute fixes no percentage. Figures circulating in the market are estimates drawn from court practice, not a statutory tariff. Building the file on conclusive evidence — delivery protocols, provisional and final acceptance certificates, the beneficiary’s own written statements, independent inspection reports — therefore affects not only the merits but the security burden directly. Where a request is supported by conclusive evidence, applying for an injunction without security is legally available.

Article 392/2 also governs the release of security: it is returned where no compensation claim is filed within one month of the judgment in the main action becoming final, or of the injunction being lifted.

8. Sequence of Action: The First 72 Hours After a Demand

Unfair encashment is measured in hours, not weeks. Once the bank completes its formal examination it pays, and from that moment the file ceases to be an injunction matter and becomes a restitution claim. The sequence is:

  1. Read the letter itself. Conditional, payable on first demand, or unconditional? The scope of the payment obligation is determined by that wording, not by the underlying contract.
  2. Serve written notice on the beneficiary and the bank. Record that performance has been rendered, that the demand is unfounded, and that all rights are reserved.
  3. Assemble the conclusive-evidence file. Acceptance protocols, delivery records, correspondence, progress payment certificates and inspection reports. This file carries both the injunction and the request to be relieved of security.
  4. Apply to the Commercial Court of First Instance under HMK Art. 389. Frame the relief as a prohibition on payment addressed to the bank, and expressly ask the court to dispense with security under HMK Art. 392/1, giving reasons.
  5. Have the order served on the bank immediately. The injunction takes effect when it reaches the bank; an order served after payment has been made does not change the outcome.
  6. If no injunction was obtained, move to restitution. Claim the principal together with commercial default interest, commission and credit-line losses, and additional damages.

What usually determines the outcome in these files is not the strength of the legal argument, but how early the notice and the injunction application were made.


Frequently asked questions

Can the encashment of a bank guarantee be stopped by a court injunction in Turkey?

Yes. By establishing prima facie evidence of bad faith or fraud and depositing court-mandated collateral, contractors can obtain an urgent preliminary injunction under CPC Art. 389 prohibiting the bank from paying the beneficiary.

Can an issuing Turkish bank refuse payment based on underlying contractual disputes?

No. Under TCO Art. 128, a bank guarantee is an autonomous obligation. Unless restrained by a formal court injunction, the bank cannot evaluate contract performance and must pay upon compliant written demand.

What amount of security deposit is required for an HMK 389 injunction?

The statute sets no fixed amount. Under HMK Art. 392/1 the petitioner must provide security against the damage the beneficiary and third parties may suffer if the injunction proves unjustified; the court fixes the amount and form of that security (HMK Art. 87/1) and may dispense with it, giving its reasons, where the request rests on an official document or other conclusive evidence or the circumstances so require.

How can a contractor recover funds if an abusive call has already been paid?

The contractor must file a Restitution Lawsuit (İstirdat Davası) against the beneficiary in Commercial Court to recover the full principal plus commercial default interest and compensatory damages.

Can an expired bank guarantee letter still be called in Turkey?

No. If the written draw-down demand is not received by the bank prior to the close of business on the expiry date, the guarantee automatically lapses and the bank is barred from paying.

How are international counter-guarantees handled under Turkish law?

International counter-guarantees governed by URDG 758 require simultaneous legal coordination: obtaining a local Turkish court injunction to block the Turkish correspondent bank while managing arbitral proceedings under the main contract.

This guide is general information, not legal advice. For advice on your specific situation, speak with a lawyer. Prepared by Lex Lata Consulting & Law.

Av. Onur Çalışıcı

About the author

Av. Onur Çalışıcı

Founding Attorney · Istanbul Bar Association · Bar reg. no 83426

Lex lata is Latin for “the law as it is”. The office was founded by Av. Onur Çalışıcı, and you deal with Av. Çalışıcı directly from the first meeting to the end of the matter. With foreign clients we write in English and explain what each Turkish document says.

Tell us briefly what happened and we will get back to you. This guide is general information, not advice on your case.

Last reviewed: August 2026 · LinkedIn: linkedin.com/in/onurcalisici

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