Turkish Customer Ignores an Unpaid Invoice: What Should a Foreign Supplier Do First? – 2026 Updated Guide

Learn what foreign suppliers should do when a Turkish customer ignores an unpaid invoice, including formal demands, enforcement, litigation and provisional attachment.

When a Turkish customer ignores an unpaid invoice, a foreign supplier should act quickly and systematically. Repeated informal reminders may not protect the supplier’s rights, especially if the customer later denies the order, delivery, price or quality of the goods.

The first legal strategy should be based on the contract, invoice, delivery evidence, customer’s objections, available assets and any applicable jurisdiction or arbitration clause.

This 2026 updated guide explains the first steps foreign suppliers should take to recover unpaid invoices from Turkish customers.

First Step: Verify the Invoice and the Underlying Transaction

Before beginning legal action, the foreign supplier should verify that the invoice accurately reflects the contract and the goods or services delivered.

The supplier should confirm the customer’s full legal name, tax information, registered address, invoice amount, due date, currency, payment terms and bank details. The supplier should also check whether the customer is alleging defective goods, incomplete delivery, unauthorized pricing or a set-off claim.

The invoice should be supported by purchase orders, signed delivery documents, transport records, acceptance certificates, service reports and correspondence confirming the transaction.

Preserve All Payment and Delivery Evidence

A foreign supplier should preserve the original contract, purchase orders, invoices, delivery records, shipping documents, customs papers, email chains and business messages.

If the customer acknowledged the debt, promised payment or requested additional time, those communications may be valuable evidence. Partial payments can also support the existence and amount of the debt.

Electronic records should be preserved in their original form where possible. Screenshots may help, but complete emails, electronic invoices, accounting records and file metadata can provide stronger evidence in 2026 disputes.

Send a Formal Payment Demand

The supplier should usually send a formal written payment demand identifying the invoice, amount owed, due date, bank information and a reasonable payment deadline.

The demand should reserve the supplier’s rights to claim interest, damages, collection costs and legal expenses where permitted. It should also request that the customer immediately identify any specific objection to the invoice.

A formal demand may establish default and encourage settlement. However, the timing and content should be reviewed carefully if there is a risk that the customer will transfer assets or conceal business activity.

Review the Contract Before Choosing the Recovery Route

The contract may contain a jurisdiction clause, arbitration agreement, governing-law provision, notice requirement, currency clause, interest provision or limitation of liability.

If the contract requires arbitration, the supplier may not be able to proceed directly before an ordinary court. If it grants jurisdiction to Turkish courts, a commercial action or enforcement proceeding may be appropriate.

A foreign supplier should also verify whether the contract was signed by an authorized representative and whether the customer’s legal entity is correctly identified.

Can a Foreign Supplier Start Enforcement in Turkey?

If the invoice debt is due and sufficiently documented, the supplier may be able to begin a monetary enforcement proceeding in Turkey without first obtaining a court judgment.

The customer may object to the proceeding. If an objection is filed, ordinary enforcement may be suspended or become contested. The supplier may then need to challenge the objection or prove the receivable through a commercial lawsuit.

Where the debt is supported by a negotiable instrument or another strong document, a different enforcement route may be available. The correct procedure should be chosen after examining the evidence and the customer’s likely defenses.

When Is a Commercial Lawsuit Necessary?

A commercial lawsuit may be appropriate when the customer disputes the invoice, delivery, product quality, contract validity or performance.

The foreign supplier may claim the unpaid principal, contractual interest, default interest, currency losses and damages where legally available. Accounting and technical expert evidence may be required if the dispute concerns quantities, quality or completed work.

For certain commercial monetary claims, a pre-litigation mediation process may be mandatory. The exact procedural requirements should be checked before filing.

Can the Supplier Request a Provisional Attachment?

A foreign supplier may request provisional attachment when there is a due monetary claim and a genuine risk that collection will become difficult.

Depending on the circumstances, the request may concern the Turkish customer’s bank accounts, real estate, vehicles, shares, inventory or receivables from other customers.

A court may require security before granting the measure. Provisional attachment is not final collection, but it can preserve assets and increase the practical value of the legal claim.

What If the Customer Is Moving Assets?

If the customer is selling property, transferring funds to a related company, changing its registered address, closing business operations or moving receivables to another entity, the supplier should treat the matter as urgent.

Asset transfers to shareholders, relatives or affiliated companies may require separate investigation. If a transfer was designed to defeat creditors, the supplier may consider legal remedies aimed at challenging the transaction.

The foreign supplier should collect evidence of the transfer, the relationship between the entities, the timing of the transaction and the value of the asset.

Can Company Directors Be Sued Personally?

A Turkish company is generally responsible for its own commercial debts, and directors are not automatically liable for an unpaid invoice.

Personal liability may arise if a director gave a personal guarantee, acted fraudulently, misused company assets or independently caused damage through unlawful conduct.

The supplier should avoid naming directors personally without a legal basis. A personal claim requires evidence of a guarantee, fraudulent conduct or another independent source of liability.

What If the Turkish Customer Claims the Goods Were Defective?

A customer may refuse payment by claiming defective goods, late delivery, incomplete performance or non-compliance with specifications.

The supplier should review inspection reports, delivery acceptance documents, warranty terms, photographs, technical records and prior communications. Silence after delivery or partial payment may be relevant, but it does not automatically defeat a genuine defect claim.

The contract may determine notification periods, inspection procedures and the supplier’s opportunity to cure the alleged defect.

How Are Interest and Currency Losses Calculated?

The supplier should identify the contractual payment currency, due date, default date and agreed interest rate. If the contract does not specify these issues, the applicable legal rules may determine the calculation.

Currency fluctuations can create disputes where the invoice was issued in a foreign currency but payment is sought in another currency. The principal, interest, partial payments and exchange-rate differences should be calculated consistently.

A financial expert may be useful where the debt includes multiple invoices, installment payments, credit notes or long periods of delay.

Can a Foreign Supplier Recover from Abroad?

A foreign supplier does not necessarily need to travel to Turkey. A Turkish lawyer may act under a power of attorney issued before a Turkish consulate or a local notary.

Depending on the country where the power of attorney is issued, legalization, apostille and official translation may be required. Foreign corporate documents may also need certification and translation.

Lawyer Fırat Fesih Kaya assists foreign suppliers with unpaid invoices, commercial enforcement, provisional attachment, litigation, arbitration and cross-border debt recovery in Turkey.

2026 Legal Considerations

In 2026, electronic invoices, online payment records, digital delivery systems, corporate emails, cloud documents and business messaging applications may be central to proving an unpaid invoice.

Foreign suppliers should preserve complete transaction records and avoid relying only on informal messages. The supplier should also check current rules on interest, mediation, enforcement deadlines, court jurisdiction and document formalities before beginning proceedings.

The most effective strategy often combines a formal demand, asset investigation, provisional protection and a carefully selected enforcement, court or arbitration route.

Frequently Asked Questions (FAQ)

1. What should a foreign supplier do first when a Turkish customer ignores an invoice?

Verify the invoice and contract, preserve delivery evidence and send a formal written payment demand.

2. Can a foreign supplier start debt enforcement without a court judgment?

In many cases, yes. A monetary enforcement proceeding may be started if the debt is due and the procedural conditions are satisfied.

3. What happens if the Turkish customer objects to enforcement?

The process may be suspended or become contested. The supplier may need to challenge the objection or file a commercial lawsuit.

4. Can the supplier freeze the customer’s bank accounts?

A provisional attachment may be requested if the legal conditions are met and there is a risk to collection.

5. Is a formal payment demand mandatory?

It may not be mandatory in every case, but it can establish default, clarify the claim and support later proceedings.

6. Can the supplier claim interest on the unpaid invoice?

Interest may be claimed according to the contract and applicable legal rules. The calculation should use the correct default date and currency.

7. What if the customer says the goods were defective?

The supplier should examine delivery acceptance records, inspection documents, warranty terms and all communications concerning the alleged defect.

8. Can a foreign supplier sue the director of the Turkish company?

Only where a personal guarantee, fraud, misuse of assets or another independent legal basis supports personal liability.

9. Can the supplier act without traveling to Turkey?

In many cases, yes. A Turkish lawyer may act under a valid power of attorney.

10. How long does invoice recovery take in Turkey?

The duration depends on objections, evidence, expert examinations, asset availability, court workload and whether the matter proceeds through enforcement, litigation or arbitration.

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 Foreign Suppliers

An ignored invoice can become more difficult to recover if the customer’s assets are transferred or evidence is lost. Early legal review helps determine whether to use a formal demand, enforcement proceeding, provisional attachment, lawsuit or arbitration.

Fırat Fesih Kaya Law Office provides professional legal support to foreign suppliers in unpaid invoice recovery, commercial debt collection, enforcement proceedings, asset protection, provisional attachment and cross-border litigation.

Call: +90 312 434 22 22
WhatsApp: +90 532 769 22 22
Email: info@firatfesihkaya.av.tr
Address: Mevlana Boulevard No:221, Yildirim Tower, Balgat, Cankaya, Ankara, Turkey