Advance Payment Guarantee Called in Turkey: How Can a Foreign Supplier Challenge the Demand? – 2026 Updated Guide

:How can a foreign supplier challenge an advance-payment guarantee called by a Turkish buyer? Learn about unfair demands, partial performance, injunctions, bank liability, restitution, and evidence.

When a Turkish buyer calls an advance-payment guarantee against a foreign supplier, the supplier may face immediate financial loss even when production has started, goods have been delivered, or the advance has already been used for the agreed project.

An advance-payment guarantee generally protects the buyer if the supplier fails to perform and does not repay the advance. However, a demand may be challengeable where it exceeds the guaranteed amount, ignores payments or completed performance, violates the guarantee wording, is made after expiry, or is clearly fraudulent or abusive.

The foreign supplier should act immediately because the bank may pay before the underlying contract dispute is resolved.

What Is an Advance-Payment Guarantee?

An advance-payment guarantee is a bank undertaking issued to secure repayment of money paid in advance to a supplier or contractor.

It may arise in:

• Construction projects;
• Equipment supply;
• Manufacturing;
• Energy projects;
• Infrastructure contracts;
• Technology agreements;
• International procurement;
• Long-term service contracts.

The guarantee is generally separate from the underlying contract. The bank may be required to pay upon a compliant demand without deciding whether the supplier actually breached the contract.

First-Demand or Conditional Guarantee?

The supplier should determine whether the guarantee is unconditional or conditional.

A first-demand guarantee may require only a written demand and a statement that the supplier failed to perform or repay the advance.

A conditional guarantee may require:

• Evidence of supplier default;
• A repayment calculation;
• A certificate from an engineer;
• A termination notice;
• A court decision;
• An arbitral award;
• Proof that the buyer demanded repayment;
• Another document specifically listed in the guarantee.

The exact wording is decisive. A supplier should compare the buyer’s demand with every requirement in the guarantee.

When Can the Demand Be Challenged?

A supplier may consider challenging the demand where:

• The demand was made after expiry;
• The amount exceeds the guarantee;
• The buyer ignored amounts already repaid;
• The guarantee was reduced after partial performance;
• A required document was missing;
• The demand was sent to the wrong bank or location;
• The beneficiary was not entitled to make the demand;
• The demand concerns an obligation outside the guarantee;
• The buyer’s statement is knowingly false;
• The call is clearly fraudulent or abusive.

A general argument that the buyer acted unfairly may not be sufficient. The supplier should identify a direct contradiction between the guarantee, the demand, and the documented facts.

Partial Performance and Reduction of the Guarantee

Advance-payment guarantees may be reduced as the supplier performs the contract or as the advance is amortized through invoices and progress payments.

The supplier should collect evidence showing:

• Goods delivered;
• Work completed;
• Invoices issued;
• Advance amount already amortized;
• Payments received;
• Accepted milestones;
• Materials purchased;
• Amount remaining to be refunded, if any.

If the buyer calls the full guarantee despite substantial performance or previous deductions, the supplier may have stronger grounds to dispute the amount.

The reduction mechanism should be reviewed in the guarantee and underlying contract.

Does a Contract Dispute Stop the Call?

Not automatically. A dispute about delay, defects, payment, variations, or termination may support a separate claim, but it may not prevent payment under an autonomous first-demand guarantee.

The bank generally examines the demand and documents, not the full merits of the construction or supply dispute.

The supplier should therefore analyze both:

1. Whether the bank demand complies with the guarantee; and
2. Whether the buyer breached the underlying contract by making the demand.

These are separate legal questions.

Can the Supplier Request an Injunction?

A foreign supplier may consider applying for an urgent injunction to prevent the buyer from enforcing the demand or the bank from making payment.

The supplier should generally provide strong evidence of:

• Documentary non-compliance;
• Expiry;
• Fraud;
• Abuse;
• A knowingly false demand;
• Excessive amount;
• Failure to satisfy a clear condition;
• Immediate and difficult-to-recover harm.

Courts are cautious when dealing with independent bank guarantees because their commercial purpose is rapid payment security.

A simple disagreement about whether the supplier performed correctly may not be enough. The application should focus on clear documentary or legal defects.

Security may be required for an interim measure.

Notice to the Turkish Bank

The supplier should notify the bank immediately after learning of the demand or threatened demand.

The notice should identify:

• The guarantee number;
• The beneficiary;
• The amount demanded;
• The expiry date;
• The demand date;
• The alleged discrepancy;
• Partial performance;
• Repayment or amortization;
• Evidence of fraud or abuse;
• Any urgent court application.

Notification alone may not stop payment. The bank may still honor a demand that appears compliant unless it identifies a valid refusal ground or receives an effective court order.

Claim Against the Turkish Buyer

If the buyer made an improper demand, the supplier may bring claims under the underlying contract.

Potential claims may include:

• Repayment of the guaranteed amount;
• Restitution;
• Compensation for wrongful calling;
• Interest;
• Financing costs;
• Loss of credit facilities;
• Contractual damages;
• Declaration that no default occurred;
• Payment of unpaid contract amounts;
• Recovery of project expenses.

The supplier should review the contract’s arbitration, governing-law, jurisdiction, notice, and security clauses.

If the Bank Has Already Paid

If the bank has already paid the buyer, the supplier may pursue repayment or damages against the beneficiary.

Recovery may be more difficult if the buyer transferred, spent, or concealed the payment. The supplier should consider urgent asset-protection measures where the evidence supports them.

The supplier should also assess whether the bank acted wrongfully by paying despite a clear documentary defect or court order.

Counter-Guarantee Structures

International transactions may involve a foreign bank issuing a counter-guarantee to a Turkish bank, which then issues the advance-payment guarantee to the Turkish buyer.

The supplier should identify:

• The local issuing bank;
• The foreign counter-guarantee bank;
• The beneficiary;
• The applicant;
• The applicable rules;
• The governing law;
• The presentation channel;
• The expiry and reduction terms.

Rights under the local guarantee and counter-guarantee may be separate. A dispute with one bank does not automatically determine the supplier’s rights against another.

Evidence the Foreign Supplier Should Preserve

The supplier should preserve:

• The advance-payment guarantee;
• Amendments and extensions;
• The underlying contract;
• Advance-payment records;
• Invoices;
• Delivery documents;
• Progress certificates;
• Acceptance records;
• Repayment and amortization calculations;
• Correspondence with the buyer;
• Default notices;
• The buyer’s demand;
• Bank communications;
• Technical and financial reports.

Electronic guarantees, digital signatures, SWIFT messages, online banking communications, cloud project files, and electronic payment records may be especially important in 2026.

Evidence should be preserved lawfully and in its original form whenever possible.

Fraud and Abuse Exception

The independence of an advance-payment guarantee is not unlimited. Clear fraud, forgery, bad faith, or abuse may justify judicial intervention.

The supplier should not make unsupported accusations. It should focus on objective evidence, such as a demand that contradicts accepted progress records, a call after repayment, a demand after expiry, or a false declaration required by the guarantee.

2026 Practical Considerations

In 2026, advance-payment guarantees may be issued electronically and managed through digital banking, electronic signatures, SWIFT communications, and online project systems.

Foreign suppliers should negotiate:

• Clear repayment conditions;
• Reduction mechanisms;
• Partial-performance certificates;
• Expiry and extension rules;
• Required demand documents;
• Notice and cure periods;
• Governing law;
• Arbitration;
• Fraud protection;
• Return of the guarantee after completion.

The supplier should review the guarantee before accepting the advance and obtain legal advice immediately after receiving a demand.

Lawyer Fırat Fesih Kaya assists foreign suppliers with Turkish advance-payment guarantees, unfair guarantee calls, injunctions, construction disputes, supply contracts, restitution, arbitration, and commercial litigation.

Frequently Asked Questions (FAQ)

1. What is an advance-payment guarantee?
It is a bank undertaking intended to protect the buyer if an advance payment must be repaid because the supplier fails to perform.

2. Can a Turkish buyer call the guarantee while the contract is disputed?
Potentially, especially under a first-demand guarantee, unless the demand is non-compliant, fraudulent, abusive, or otherwise legally defective.

3. Can a foreign supplier challenge the demand before payment?
Yes, the supplier may consider an injunction or other urgent measure where strong evidence supports the challenge.

4. Does partial performance reduce the guarantee amount?
It may, if the guarantee or contract provides for reduction or if the advance has been amortized through completed performance.

5. Can the bank decide whether the supplier breached the contract?
Usually, the bank examines the guarantee demand and required documents rather than resolving the underlying dispute.

6. What if the buyer demands the full amount after receiving repayment?
The supplier may challenge the demand as excessive or abusive and seek urgent protection and repayment.

7. Can the supplier notify the bank that the demand is unfair?
Yes. The supplier should notify the bank immediately, although notification alone may not prevent payment.

8. Can the supplier recover money after the guarantee is paid?
Potentially. The supplier may pursue restitution, damages, and contractual claims against the Turkish buyer.

9. Can a court stop payment under a first-demand guarantee?
Potentially, but courts generally require strong evidence of fraud, abuse, expiry, or clear documentary non-compliance.

10. What should a foreign supplier do immediately?
The supplier should obtain the guarantee and demand, review partial performance, notify the bank, preserve evidence, and seek urgent Turkish legal advice.

This article is provided for general informational purposes only and does not constitute legal advice. We recommend consulting a lawyer about your specific circumstances to avoid any loss of rights.

Expert Legal Support for Advance-Payment Guarantee Disputes

Expert legal support is essential to avoid losing valuable rights. By working with a lawyer experienced in Turkish advance-payment guarantees, performance bonds, demand guarantees, injunctions, construction disputes, restitution, arbitration, and commercial litigation, foreign suppliers can protect their financial interests. Fırat Fesih Kaya Law Office provides professional legal support for guarantee disputes in Turkey and abroad.

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