Customs Rejects an Import Invoice in Turkey: Alternative Evidence of Transaction Value — 2026 Current Guide

What can an importer do when Turkish Customs rejects an invoice? Learn how to prove transaction value with bank records, contracts, accounting data and alternative evidence in 2026.

Turkish Customs may reject an import invoice when it doubts whether the declared price reflects the actual price paid or payable. This does not automatically mean that the importer committed undervaluation or fraud. However, the importer must provide reliable evidence showing how the price was agreed, paid and recorded.

The strongest defence is usually a consistent evidence package combining commercial documents, bank records, accounting entries, transport costs, related-party explanations and supplier confirmations. If the transaction value cannot be accepted, Customs may apply alternative valuation methods and assess additional customs duty, import VAT, interest and penalties.

Why Can Turkish Customs Reject an Import Invoice?

An invoice may be questioned because:

• The unit price appears unusually low;
• The price differs from previous imports;
• The invoice conflicts with bank transfers;
• The importer and exporter are related;
• Discounts are not explained;
• Credit or debit notes were issued later;
• Payments were made by a third party;
• Freight, insurance or commissions are missing;
• Royalties or licence fees were not declared;
• Free-of-charge components were used;
• The invoice does not match the customs declaration;
• Customs suspects an artificial or incomplete transaction.

A low price alone should not automatically establish undervaluation. Customs should examine the commercial circumstances and the objective evidence supporting the transaction value.

Transaction Value Is the Primary Method

Under the customs valuation framework, the transaction value is generally the first method to be examined. It is based on the price actually paid or payable for goods sold for export to Turkey, subject to legally required additions.

The Turkish Ministry of Trade describes the order of valuation methods in its official customs valuation guidance. Alternative methods should generally be considered only where the transaction value cannot legally be accepted.

The importer should therefore explain why the invoice price is genuine before Customs moves directly to a reference price or another valuation method.

Alternative Evidence of the Transaction Value

Sales Contracts and Purchase Orders

A signed sales contract can show:

• The agreed unit price;
• Currency;
• Delivery term;
• Payment schedule;
• Quantity discounts;
• Warranty arrangements;
• Price-adjustment clauses;
• Incoterms;
• Responsibility for freight and insurance.

Purchase orders, order confirmations and supplier quotations may also demonstrate that the price was agreed before shipment.

Bank and Payment Records

Bank evidence can include:

• Bank statements;
• SWIFT messages;
• Payment instructions;
• Letters of credit;
• Advance-payment records;
• Instalment schedules;
• Supplier account statements;
• Intercompany settlement records;
• Third-party payment explanations;
• Credit and debit notes.

If one transfer covers several invoices, the importer should prepare a reconciliation table identifying the amount allocated to each declaration.

A payment difference may be caused by bank charges, currency conversion, a deposit, a credit note, freight or a payment for several shipments. Each difference should be explained with objective evidence.

Accounting and ERP Records

Customs may examine:

• Purchase ledgers;
• Accounts payable;
• Inventory records;
• General ledger entries;
• Cost accounting data;
• ERP transaction logs;
• E-invoices;
• E-ledgers;
• Stock movement records;
• Audit reports;
• Management accounts.

The accounting records should show that the invoice was recorded at the declared price and that the payment was properly booked. A reconciliation between the customs declaration, invoice, accounting entry and bank payment can be highly persuasive.

Supplier Confirmation

The foreign supplier may issue a written confirmation stating:

• The invoice is authentic;
• The price was agreed before shipment;
• No undisclosed side payment exists;
• No later price adjustment has been omitted;
• The payment amount corresponds to the goods;
• Any difference has a documented explanation.

Supplier confirmation is more credible when supported by the contract, purchase order, bank record and account statement.

Price Lists and Comparable Sales

The importer may provide:

• Supplier price lists;
• Prices offered to unrelated customers;
• Historical prices;
• Regional price comparisons;
• Product-quality differences;
• Volume-discount schedules;
• Market reports;
• Independent commercial quotations.

A comparison should account for differences in quantity, model, quality, delivery term, warranty, market and date. A simple comparison with another product may not be reliable.

Customs Additions That Must Be Analysed

Even if the invoice price is accepted, certain additions may be required. These can include:

• Commissions and brokerage, except buying commissions;
• Container costs;
• Packing costs;
• Free-of-charge materials and components;
• Tools, moulds and production equipment;
• Engineering and design work;
• Royalties and licence fees that are a condition of sale;
• Resale proceeds accruing to the seller;
• Transport and insurance costs up to the Turkish entry point.

The Turkish Ministry’s guidance states that additions should be based on objective and quantifiable data.

The importer should not accept an unexplained lump-sum addition. Each item should be connected to the imported goods and supported by records.

Costs That May Be Excluded

Where separately identified, certain costs may not be included in customs value, such as:

• Transport after arrival in Turkey;
• Post-importation assembly;
• Maintenance and technical assistance performed after import;
• Certain financing interest;
• Buying commissions;
• Import duties and domestic taxes.

The contract, invoice and cost-allocation records should show these amounts separately.

Related-Party Transactions

When the importer and exporter are related, Customs may question whether the relationship affected the price.

The importer should prepare:

• Group-structure charts;
• Shareholding information;
• Transfer-pricing documentation;
• Comparable uncontrolled prices;
• Resale-price analyses;
• Cost-plus calculations;
• Intercompany agreements;
• Year-end adjustment explanations;
• Profit-margin data.

A related-party transaction is not automatically unacceptable. The importer may prove that the price was commercially determined and that the relationship did not influence the transaction value.

Transfer pricing and customs valuation should be coordinated, but they are not identical. A price accepted for corporate-tax purposes may still require a separate customs explanation.

What If the Invoice Was Issued Incorrectly?

If the invoice contains a genuine clerical error, the importer should obtain an authorised corrected invoice and explain the circumstances transparently.

The importer should not:

• Change the invoice independently;
• Backdate a document;
• Create a new invoice without a commercial basis;
• Hide a credit note;
• Split payments artificially;
• Use a different price only for Customs;
• Submit inconsistent explanations.

An unauthorised correction may create a greater customs risk than the original mistake.

Alternative Valuation Methods

If Customs lawfully rejects the transaction value, it may consider methods based on:

1. The transaction value of identical goods;
2. The transaction value of similar goods;
3. The deductive value method;
4. The computed value method;
5. The fallback method.

The methods should generally be applied in the prescribed order, unless the applicable rules permit a different sequence upon a written request.

The importer should ask Customs to explain:

• Why the transaction value was rejected;
• Which alternative method was used;
• Which comparable goods were selected;
• How adjustments were made;
• How the final customs value was calculated.

A valuation decision that provides no clear methodology may be challenged.

Penalties and Financial Exposure

If Customs concludes that the declared value was deficient, the importer may face:

• The customs duty difference;
• Import VAT on the revised base;
• Additional customs duties;
• Interest;
• Administrative customs penalties;
• Storage and demurrage costs.

Under the customs penalty framework, the penalty may be calculated by reference to the duty difference. A lower penalty treatment may apply in certain minor or formal accounting-error situations, but the facts must be assessed carefully.

If Customs alleges intentional falsification or deliberate duty evasion, anti-smuggling provisions may also become relevant. A rejected invoice does not automatically prove criminal intent.

Post-Clearance Valuation Investigations

Customs may investigate the invoice after the goods have been released. A post-clearance audit can cover:

• Several customs declarations;
• Multiple suppliers;
• Related-party transactions;
• Historical discounts;
• Royalty payments;
• Transfer-pricing adjustments;
• Accounting and bank records.

Under the general framework of Customs Law No. 4458, under-assessed customs duties may generally be notified within three years from the date the customs debt arose, subject to statutory exceptions.

The importer should preserve records for each declaration and avoid providing unrelated information beyond the scope of the request.

How Can the Importer Challenge the Decision?

The importer should request the complete written assessment and submit:

• The contract;
• Purchase order;
• Original invoice;
• Corrected invoice, if applicable;
• Bank and payment records;
• Supplier confirmation;
• Accounting reconciliation;
• Freight and insurance evidence;
• Royalty and commission analysis;
• Related-party documentation;
• A challenge to the alternative valuation method.

Under Article 242 of Customs Law No. 4458, an objection is generally filed within 15 days from lawful notification of the customs decision.

If the objection is rejected, the importer may bring proceedings before the competent tax court within the applicable procedural period. An objection or lawsuit does not automatically suspend collection. A separate suspension-of-execution request may be necessary where immediate payment would cause serious and difficult-to-repair harm.

Settlement may be available for certain customs receivables and penalties. The importer should compare settlement with litigation and possible contractual claims against the supplier.

2026 Compliance Priorities

In 2026, Turkish Customs increasingly compares customs declarations with:

• E-invoices;
• E-ledgers;
• Bank data;
• ERP records;
• Freight platforms;
• Transfer-pricing reports;
• Supplier databases;
• Electronic customs systems.

Companies should maintain a transaction-value file before importation. It should contain the agreed price, payment route, discount basis, freight allocation, royalty position and related-party analysis.

Practical Response Checklist

When an invoice is rejected, the importer should:

1. Obtain the written reason for rejection.
2. Identify the relevant customs declarations.
3. Record the notification date.
4. Reconcile invoice, payment and accounting records.
5. Obtain supplier confirmation.
6. Explain discounts and credit notes.
7. Analyse royalties, commissions and assists.
8. Review related-party pricing.
9. Challenge any unsupported alternative value.
10. File the objection within the legal deadline.

Frequently Asked Questions (FAQ)

1. Can a bank transfer prove the transaction value?

It is important evidence, but Customs may also require contracts, invoices, accounting records and explanations of any difference.

2. What if the importer has not paid the invoice yet?

The importer may provide the contract, purchase order, accounts-payable records and payment terms proving the price payable.

3. Can a supplier confirmation replace the invoice?

Usually not by itself. It should support the invoice together with payment, contract and accounting evidence.

4. Are related-party invoices automatically rejected?

No. The importer can prove that the relationship did not influence the price.

5. Can Customs include royalties in customs value?

Potentially, where the royalty relates to the imported goods and is a condition of sale. The facts and contract must be examined.

6. Can freight after importation be excluded?

Potentially, if it is separately identified and properly documented.

7. Can Customs use a reference price instead of the invoice?

Only where the transaction value cannot be accepted under the applicable valuation rules. The method and calculation should be explained.

8. Can a corrected invoice be submitted?

Possibly, if the correction is genuine, authorised and supported by commercial records. Independent alterations and backdating should be avoided.

9. What is the deadline to object to a customs valuation assessment?

An objection is generally filed within 15 days from lawful notification under Article 242 of Customs Law No. 4458.

10. Can the importer challenge an alternative valuation method?

Yes. The importer may challenge the rejection of the transaction value, the chosen method, comparable goods and the final calculation.

This article is intended for general informational purposes only. To avoid any loss of rights, we recommend consulting your lawyer regarding your specific circumstances.

Legal Support for Customs Valuation Disputes

Fırat Fesih Kaya Law Office advises international companies, foreign suppliers, Turkish importers, manufacturers, distributors and logistics providers on invoice rejection and customs valuation investigations.

Lawyer Fırat Fesih Kaya can assist with transaction-value evidence, bank and accounting records, supplier confirmations, royalty and freight analysis, related-party pricing, customs audits, administrative objections and tax-court proceedings.

For urgent legal support:

Mobile / WhatsApp: +90 532 769 22 22
Office: +90 312 434 22 22
Email: info@firatfesihkaya.av.tr
Address: Mevlana Boulevard No: 221, Yıldırım Tower, Balgat, Çankaya / Ankara, Turkey