Foreign Supplier Sends Wrong or Undeclared Goods to Turkey | Customs Liability 2026

Who pays customs taxes and penalties when a foreign supplier sends incorrect or undeclared goods to Turkey? Learn about importer liability, customs declarations, wrong quantities, undeclared goods, penalties, supplier recourse, and 2026 legal remedies.

A foreign supplier may accidentally or deliberately send goods to Turkey that do not correspond with the commercial invoice, packing list, purchase order, or customs declaration. The shipment may contain additional products, the wrong model, a larger quantity, different materials, undeclared spare parts, promotional goods, samples, or completely different merchandise.

When Turkish customs authorities discover the discrepancy, one of the most important questions is:

Who is responsible for the additional customs taxes and administrative penalties: the foreign supplier or the Turkish importer?

The answer is not determined simply by who made the commercial mistake.

Under Turkish customs law, customs authorities primarily examine the customs declaration, the declarant, the importer, the applicable representation structure, and the persons who may be legally responsible for the customs debt. The fact that a foreign supplier caused the discrepancy does not automatically prevent Turkish customs authorities from assessing taxes or penalties against parties involved in the Turkish customs procedure.

However, if the foreign supplier caused the problem, the importer may have separate contractual rights to recover taxes, penalties, storage costs, demurrage, return freight, and other commercial losses from the supplier.

The customs liability and the contractual liability between buyer and seller should therefore be analyzed separately.

What Happens If the Physical Goods Do Not Match the Customs Declaration?

Goods entering Turkey must be correctly declared according to matters such as:

• Type
• Quantity
• Tariff classification
• Customs value
• Country of origin
• Import permits
• Technical characteristics
• Product status
• Applicable trade-policy measures

Turkish customs authorities may physically inspect goods and compare the actual shipment with the declaration and supporting documents.

If authorities discover merchandise that was not declared or determine that the goods materially differ from the declaration, the consequences may include:

• Additional customs duties
• Value-added tax
• Additional customs duties
• Anti-dumping duties
• Other import charges
• Administrative monetary penalties
• Product-safety controls
• Detention of the shipment
• Re-export requirements
• Seizure in serious cases
• Anti-smuggling investigations

The seriousness of the case depends on the type of discrepancy and whether authorities believe the conduct was an innocent commercial mistake or intentional evasion.

Is the Foreign Supplier Automatically Liable to Turkish Customs?

No.

A foreign supplier is not automatically the person against whom Turkish customs authorities will pursue every customs debt or administrative penalty merely because the supplier packed the wrong goods.

Turkish customs authorities generally focus on the persons involved in the Turkish customs procedure, including the declarant and, depending on the legal structure, the importer or representative.

A foreign supplier that has no role in the Turkish customs declaration may therefore be commercially responsible for causing the problem without necessarily being the direct customs debtor in Turkey.

This distinction is fundamental.

Customs liability concerns the relationship with Turkish customs authorities.

Contractual liability concerns whether the importer can recover its losses from the supplier.

The importer may therefore first face a customs assessment in Turkey and later seek reimbursement from the foreign supplier.

Who Is the Declarant?

The declarant is the person in whose name a customs declaration is made or the person making the declaration in their own name.

Companies may conduct their own customs procedures or appoint authorized customs representatives. The Ministry of Trade confirms that companies are not legally required to appoint a customs broker and may conduct customs procedures themselves, although customs brokers commonly handle declarations because customs law involves technical issues concerning classification, value, origin, and foreign-trade requirements.

Who actually made the declaration and under what representation structure is therefore important when determining liability.

Direct and Indirect Representation Can Affect Liability

Representation structure should be examined carefully.

In customs practice, direct representation generally means that the representative acts in the name and on behalf of another person.

Indirect representation involves the representative acting in its own name but on behalf of another person.

Turkish customs rules contain specific liability provisions relating to indirect representation. In particular, responsibility may arise where an indirect representative knew or, because of professional duties, should normally have known that information used in the declaration was incorrect.

Relevant circumstances can include obvious inconsistencies between documents, readily identifiable false or incorrect documents, or a tariff declaration that plainly contradicts the characteristics shown in the accompanying documents.

Accordingly, simply appointing a customs broker does not mean that the importer automatically transfers all customs risk to the broker.

What If the Supplier Sends More Goods Than Shown on the Invoice?

Quantity discrepancies are common.

For example:

• Invoice states 1,000 units but the container contains 1,200 units.
• Twenty additional spare parts are included free of charge.
• Supplier adds promotional items without informing the importer.
• Additional raw material is loaded by mistake.

Customs authorities will examine whether the undeclared quantity gives rise to additional customs obligations or another violation.

The importer should immediately determine:

• Why the excess goods were shipped
• Whether they belong to the importer
• Whether they were invoiced
• Their value
• Their tariff classification
• Whether import permits are required
• Whether they can lawfully enter Turkey

The company should not attempt to conceal the excess quantity after it has been discovered.

“Free of Charge” Does Not Mean “No Customs Value”

A frequent supplier mistake is sending additional products marked “free of charge.”

Commercially free goods can still have a customs value.

For customs valuation purposes, the relevant Turkish rules may require the value of imported goods to be established even where the commercial invoice does not contain a normal purchase price.

The Ministry of Trade’s customs valuation guidance confirms that various elements connected with imported goods may need to be included in customs value and that customs valuation is governed by Articles 23 through 31 of Customs Law No. 4458.

Foreign suppliers should therefore not place samples, replacement products, promotional goods, or spare parts inside a shipment without informing the importer.

What If Completely Different Goods Arrive?

The risk is greater where the shipment contains products of a different type.

For example, the purchase order may concern industrial pumps but the container also contains:

• Electronic components
• Chemical products
• Spare motors
• Control panels
• Replacement equipment
• Tools

Different goods may have completely different:

• Tariff classifications
• Customs duties
• Import permits
• Product-safety requirements
• TAREKS requirements
• Anti-dumping exposure

A supplier’s packing mistake may therefore create consequences far beyond a simple quantity difference.

Incorrect Tariff Classification Caused by Supplier Information

Another common situation arises where the importer correctly declares the product according to information supplied by the foreign manufacturer, but customs later discovers that the product specification is different.

For example, the supplier may provide:

• Wrong material composition
• Incorrect technical specification
• Wrong product catalogue
• Incorrect model number
• Misleading description

This can result in a different tariff classification and additional duties.

If additional taxes become payable because the declaration was incorrect, customs authorities may still address the Turkish customs parties first.

The importer may then pursue the supplier contractually if the supplier supplied materially incorrect information.

Incorrect Customs Value

Foreign suppliers may also cause customs penalties by issuing inaccurate invoices.

Examples include:

• Invoice value lower than the actual purchase price
• Side payments not shown on the invoice
• Incorrect discount
• Missing royalty information
• Incorrect freight allocation
• Related-party pricing not properly disclosed

Current Ministry guidance states that where the declared customs value is lower than the value determined under the Customs Law, additional import taxes may be assessed and Article 234 can also result in an administrative fine calculated by reference to the tax difference.

The same guidance expressly notes that the provisions of Anti-Smuggling Law No. 5607 remain reserved where the circumstances are sufficiently serious.

What If Import Permits Were Required for the Undeclared Goods?

This can substantially increase the risk.

Current Ministry guidance states that where imported goods require a license, permit, conformity certificate, or equivalent information but are declared as though no such requirement applies, the importer may be referred to the relevant institution for the necessary controls.

If the resulting inspection is negative, or if required import controls were represented as completed when they were not, penalties under Article 235 of the Customs Law may apply.

Accordingly, undeclared additional products may create both tax consequences and regulatory penalties.

Can the Importer Say “The Supplier Made the Mistake”?

Yes, but that explanation does not automatically eliminate customs liability.

The importer should provide evidence showing:

• What was actually ordered
• What the supplier promised to ship
• What was invoiced
• What was packed without authorization
• When the importer discovered the discrepancy
• Whether the importer had any prior knowledge

Important evidence includes:

• Purchase order
• Sales contract
• Proforma invoice
• Commercial invoice
• Packing list
• Supplier emails
• Shipping instructions
• Payment records
• Quality-control reports

These documents can help demonstrate that the importer did not intentionally cause the discrepancy.

However, Turkish customs liability is determined under customs legislation, not only according to which contractual party was commercially at fault.

Does Lack of Knowledge Eliminate the Additional Customs Tax?

Usually, not necessarily.

Customs duties concern the goods and the applicable customs debt. The fact that an importer did not know that the supplier loaded additional taxable goods does not necessarily mean that legally due import taxes disappear.

Lack of knowledge may nevertheless be highly important when determining:

• Administrative penalty liability
• Intent
• Anti-smuggling exposure
• Responsibility of representatives
• Contractual recourse against the supplier

The importer should therefore distinguish between the tax itself and the penalty imposed because of the incorrect declaration.

Can the Customs Broker Be Responsible?

Potentially, but only where the facts support responsibility.

A customs broker cannot normally be expected to know that a sealed container physically contains completely different goods when every document supplied by the importer and foreign supplier appears consistent.

However, responsibility may arise where the customs representative knew or professionally should have known that the declaration information was wrong.

Rules relating to indirect representation specifically identify situations such as obvious contradictions between supporting documents or clearly defective documentation as potentially relevant to responsibility.

The importer should therefore preserve all correspondence showing what information was provided to the customs broker.

Can Undeclared Goods Trigger an Anti-Smuggling Investigation?

Yes, in serious circumstances.

Not every discrepancy constitutes smuggling.

A genuine supplier packing error should not automatically be equated with deliberate customs evasion.

However, a criminal investigation may arise where authorities suspect conduct involving:

• Deliberate concealment
• False documentation
• Intentional misdescription
• Importation of prohibited goods
• Fraudulent permits
• Systematic undeclared imports
• Attempts to avoid taxes or regulatory controls

Anti-Smuggling Law No. 5607 may become relevant depending on the conduct and evidence.

Where prosecutors or customs enforcement units become involved, the company should obtain legal representation immediately.

Can the Incorrect Goods Be Returned to the Supplier?

Potentially, depending on their customs status.

Goods entering Turkey remain under customs supervision and must receive a customs-approved treatment or use. Official Ministry guidance identifies available treatments including placement under a customs regime, entry into a free zone, re-export, destruction, or abandonment to customs.

Accordingly, it may be possible to arrange return to origin or re-export rather than complete importation.

However, returning the goods does not automatically cancel every penalty or investigation already arising from the incorrect declaration.

Should the Importer Ask for Re-Export Immediately?

Not before understanding the consequences.

The importer should first determine:

• Whether the goods can legally be imported after correction
• Amount of additional taxes
• Possible penalties
• Storage and demurrage
• Re-export cost
• Whether supplier will accept return
• Whether the supplier will pay expenses

For valuable commercial goods, paying additional customs taxes may sometimes be economically preferable to international return freight.

In other cases, re-export may be the only commercially reasonable solution.

Can the Importer Recover Customs Taxes From the Supplier?

Potentially, through a contractual claim.

Suppose the supplier ships goods worth EUR 100,000 instead of the EUR 60,000 shipment ordered and the importer becomes responsible for additional customs charges.

Whether those taxes can be recovered from the supplier depends on the contract and governing law.

Relevant contractual provisions may include:

• Product-description warranties
• Quantity obligations
• Compliance warranties
• Documentation obligations
• Indemnity provisions
• Incoterms
• Limitation-of-liability clauses
• Governing law
• Dispute-resolution clause

A supplier that breaches its contractual obligations may potentially be required to compensate losses caused by that breach.

Can Administrative Penalties Also Be Recovered From the Supplier?

Potentially, but this is usually more complicated.

The supplier may argue that the importer had its own independent responsibility to check the customs declaration.

The importer may argue that the penalty arose directly because the supplier secretly or mistakenly loaded undeclared goods.

The result will depend on:

• Contract wording
• Cause of the penalty
• Importer’s conduct
• Supplier’s conduct
• Whether the importer knew of the discrepancy
• Whether the loss was foreseeable

Contractual indemnity clauses can become especially important in international supply agreements.

Can Storage and Demurrage Be Claimed Against the Supplier?

Potentially, yes.

Incorrect goods may remain at Turkish customs for weeks while the parties determine whether to import, re-export, or challenge a customs decision.

Losses may include:

• Port storage
• Customs warehouse fees
• Container demurrage
• Container detention
• Inspection expenses
• Customs broker charges
• Repacking costs
• Return freight

These expenses should be documented carefully.

The importer should send the supplier prompt written notice that it holds the supplier responsible for losses caused by the incorrect shipment.

Incoterms Do Not Automatically Decide Customs Penalty Liability

Incoterms can allocate delivery obligations, transportation costs, insurance responsibilities, and risk between buyer and seller.

However, Incoterms do not replace Turkish customs legislation.

For example, even where the seller bears extensive delivery obligations under DDP, Turkish customs authorities will still determine customs debt and penalties according to applicable domestic law and the structure of the customs declaration.

Similarly, an FOB or CIF term does not automatically excuse a supplier that sent goods materially different from those required by the sales agreement.

The customs relationship and sales-contract relationship should be examined separately.

What If the Supplier Admits the Mistake?

Obtain the admission in writing.

A supplier confirmation should ideally identify:

• Purchase order
• Container
• Incorrect goods
• Correct goods
• Quantity discrepancy
• Reason for the error
• Confirmation that the importer did not request the additional goods

This document may assist both in customs proceedings and in a later contractual damages claim.

However, a supplier admission does not automatically bind Turkish customs authorities.

Can the Importer Challenge the Customs Penalty?

Yes, where the applicable conditions are satisfied.

Relevant customs administrative decisions may generally be challenged through the administrative objection procedure under Article 242 of Customs Law No. 4458.

The statutory objection period is commonly 15 days from notification for decisions falling within Article 242.

The objection should distinguish carefully between:

• Taxes that are legally due
• Administrative penalties
• Incorrect factual assumptions
• Supplier-caused discrepancies
• Absence of intent
• Incorrect application of the relevant penalty provision

The formal notification date should be recorded immediately.

What Evidence Should the Importer Preserve?

A strong file should include:

• Purchase agreement
• Purchase order
• Proforma invoice
• Commercial invoice
• Packing list
• Bill of lading
• Customs declaration
• Supplier correspondence
• Payment records
• Customs inspection report
• Container opening records
• Photographs
• Product specifications
• Supplier admission
• Customs penalty decision
• Storage and demurrage invoices

The evidence should clearly demonstrate what the importer ordered and what the supplier actually shipped.

What Should Foreign Companies Do Immediately?

When incorrect or undeclared goods are discovered at Turkish customs, the importer should:

1. Stop making inconsistent customs statements.
2. Obtain the inspection report.
3. Identify exactly which goods differ from the declaration.
4. Notify the supplier immediately.
5. Obtain a written supplier explanation.
6. Determine additional customs taxes.
7. Check whether permits or TAREKS controls apply.
8. Determine whether penalties have been imposed.
9. Assess anti-smuggling risk.
10. Review return-to-origin or re-export options.
11. Preserve the 15-day customs objection deadline where applicable.
12. Document storage and demurrage.
13. Review contractual indemnity rights against the supplier.
14. Preserve all evidence showing that the importer did not request the incorrect shipment.

Frequently Asked Questions

1. Who pays customs tax if a foreign supplier sends extra goods to Turkey?

The answer depends on the customs declaration and applicable customs-debt rules. Turkish customs authorities may pursue the persons legally responsible under customs legislation even if the commercial mistake originated with the foreign supplier. The importer may separately have a contractual claim against the supplier.

2. Is the supplier automatically responsible for Turkish customs penalties?

No. Supplier fault does not automatically determine who is legally liable to Turkish customs. Customs responsibility and contractual responsibility are separate issues.

3. What happens if undeclared goods are found inside a container?

Customs authorities may assess additional taxes, impose applicable administrative penalties, require additional product controls, detain the goods, require re-export, or, in serious cases, initiate an anti-smuggling investigation.

4. Can free samples create customs liability?

Yes. A zero commercial price does not automatically mean that the goods have no customs value or require no customs declaration.

5. Can the importer avoid penalties by proving the supplier made the mistake?

Supplier fault can be highly relevant, particularly regarding knowledge, intent, and contractual recourse, but it does not automatically eliminate all customs consequences.

6. Can the customs broker also become liable?

Potentially. Liability may arise in an indirect representation structure where the representative knew or professionally should have known that declaration data was incorrect.

7. Can incorrect goods be sent back to the foreign supplier?

Potentially, yes. Depending on the customs status, return to origin or re-export may be available. However, return does not necessarily cancel an existing penalty or investigation.

8. Can the importer recover storage and customs losses from the supplier?

Potentially, where the supplier breached the sales contract and caused the loss. Recovery depends on the contractual terms, governing law, and evidence.

9. Can undeclared goods result in a criminal case?

Yes, where authorities suspect deliberate customs evasion, concealment, false documents, prohibited goods, or other conduct falling within Anti-Smuggling Law No. 5607. A genuine commercial mistake must be distinguished from intentional conduct.

10. When should a foreign-owned importer instruct a customs lawyer?

Immediately where substantial taxes or penalties are imposed, goods are detained, customs suspects smuggling, an Article 242 objection deadline is running, or the importer wishes to pursue losses against the foreign supplier.

Legal Support for Foreign Companies Facing Incorrect or Undeclared Shipments in Turkey

A supplier’s shipping mistake can create significant customs exposure for the importer even where the importer did not request or know about the incorrect goods. Additional taxes, customs penalties, TAREKS controls, storage charges, demurrage, re-export expenses, and even anti-smuggling investigations may arise before the commercial responsibility of the foreign supplier is resolved.

Fırat Fesih Kaya Law Office provides legal assistance to foreign-owned companies, importers, manufacturers, international trading businesses, and logistics companies facing customs disputes caused by incorrect or undeclared shipments in Turkey.

Lawyer Fırat Fesih Kaya assists clients with customs tax assessments, undeclared goods, quantity and classification discrepancies, Article 234 and Article 235 penalties, Article 242 customs objections, return-to-origin and re-export procedures, anti-smuggling investigations, supplier indemnity claims, and recovery of storage, demurrage, and other losses arising from incorrect shipments.

Early legal intervention can help separate customs liability from supplier contractual liability, protect short objection periods, reduce regulatory risk, and preserve the importer’s right to recover losses from the party that actually caused the shipment error.

Phone: +90 312 434 22 22
Mobile: +90 532 769 22 22
Email: info@firatfesihkaya.av.tr
Address: Mevlana Boulevard No:221, Yıldırım Tower No:148, 06520 Balgat, Çankaya, Ankara, Turkey

This publication is provided for general informational purposes and does not constitute legal advice. Liability for incorrect or undeclared imported goods should be assessed according to the customs declaration, representation structure, product, nature of the discrepancy, applicable taxes and regulatory controls, contractual terms, and legislation in force at the relevant time.