How Should Foreign Manufacturers Respond to a Turkish Anti-Dumping Questionnaire? – 2026 Legal Guide

Learn how foreign manufacturers should answer a Turkish anti-dumping questionnaire, protect their dumping margin and avoid adverse facts available findings.

Receiving a Turkish anti-dumping questionnaire is a critical legal and commercial event. It does not mean that the manufacturer has already been found to be dumping. However, an incomplete, late or inconsistent response may cause Turkish authorities to calculate the dumping margin using adverse facts available, potentially leading to a significantly higher customs duty.

Foreign manufacturers should therefore treat the questionnaire as a formal evidentiary process requiring legal, accounting, economic and technical coordination.

What Is a Turkish Anti-Dumping Questionnaire?

A Turkish anti-dumping questionnaire is an official request for information sent to foreign manufacturers, exporters, producers, affiliated companies and, in some cases, importers. The purpose is to determine:

• Whether the product is exported to Türkiye below its normal value;
• The correct export price;
• The normal value in the exporting country;
• The dumping margin;
• Whether the domestic industry has suffered material injury;
• Whether dumped imports caused that injury.

Turkey’s anti-dumping framework is primarily based on Law No. 3577 on the Prevention of Unfair Competition in Imports and its implementing legislation. The Ministry of Trade explains that an anti-dumping measure may be imposed only after the relevant authorities assess dumping, injury and causation. The Ministry’s official anti-dumping and subsidy page provides information about investigations, measures and applicable legislation.

The questionnaire is usually the manufacturer’s most important opportunity to establish an individual dumping margin and challenge the allegations with transaction-level evidence.

What Happens After the Questionnaire Is Received?

The process generally develops through the following stages:

1. Publication or notification of the investigation notice;
2. Service of questionnaires on interested parties;
3. Submission of initial responses;
4. Deficiency letters and requests for clarification;
5. Preliminary findings or provisional measures, where applicable;
6. Verification of information;
7. Final determination;
8. Definitive anti-dumping duty, termination or another legally available outcome;
9. Review proceedings after the measure enters into force.

The exact procedure depends on the investigation notice and the relevant product. The Ministry’s official application and questionnaire resources should be checked together with the specific notice published for the investigation.

Step One: Control the Deadline Immediately

Questionnaire deadlines can be short and extensions are not automatic. A manufacturer should immediately:

• Record the submission deadline and time zone;
• Identify whether the deadline applies to the producer, exporter or both;
• Request an extension before the original deadline expires;
• Explain the reasons for the extension request;
• Preserve all relevant electronic and paper records;
• Obtain a power of attorney if Turkish counsel will communicate with the authority.

An extension request does not suspend the original deadline unless formally accepted. The safest approach is to submit a written request as soon as the information burden becomes clear.

Step Two: Establish a Coordinated Response Team

A reliable answer normally requires more than a lawyer. The response team should include:

• Turkish trade-remedies counsel;
• International anti-dumping counsel;
• Finance and accounting personnel;
• Sales and pricing managers;
• Production and cost-accounting specialists;
• Logistics and customs personnel;
• IT or data-management staff;
• Local importers and distributors, where relevant.

Lawyer Fırat Fesih Kaya and the Fırat Fesih Kaya Law Office can coordinate the Turkish legal aspects of the investigation, including questionnaire strategy, confidentiality, customs consequences, administrative applications and judicial remedies.

One person should be responsible for version control. Different departments must not submit conflicting descriptions of the same transaction, product or accounting method.

Step Three: Understand the Product Scope and Product Matching

Product matching is one of the most important parts of an anti-dumping response. The authority may compare products using product-control numbers, model codes or physical characteristics.

The manufacturer should prepare a detailed product map covering:

• Model and part number;
• Dimensions and weight;
• Raw materials;
• Grade, quality and technical specifications;
• Function and end use;
• Production process;
• Packaging;
• Brand and technology;
• Customer type;
• Sales channel;
• Warranty and service terms.

If the questionnaire’s product definition is too broad or includes products with materially different characteristics, the manufacturer should explain the differences with technical documents, catalogues, test reports, photographs and engineering records.

A product that appears similar by name may have a different cost structure, customer segment or commercial value. These differences can materially affect the dumping-margin calculation.

Step Four: Prepare a Complete Export Transaction Database

The export database should cover every relevant sale during the investigation period, not merely selected transactions. Each line should be traceable to primary records such as:

• Commercial invoices;
• Purchase orders;
• Sales contracts;
• Packing lists;
• Bills of lading;
• Export declarations;
• Customs records;
• Bank receipts;
• Credit notes;
• Rebate documentation;
• Freight and insurance invoices;
• Commission agreements.

The database should identify the buyer, destination, product code, quantity, currency, invoice price, payment terms, delivery term and all post-invoice adjustments.

Authorities may question whether discounts, rebates or credits were actually granted. Every adjustment should therefore be supported by contemporaneous commercial records and reconciled to the company’s accounting system.

Step Five: Explain the Export Price

The export price is generally built from the price at which the product is sold for export to Turkey, subject to the methodology applied in the investigation.

The manufacturer should explain:

• The invoiced price;
• The sale date and shipment date;
• Currency conversion;
• Payment terms;
• Credit costs;
• Inland freight;
• International freight;
• Insurance;
• Handling and port charges;
• Packing costs;
• Commissions;
• Discounts and rebates;
• After-sales expenses;
• Related-party involvement;
• Any export taxes or fees.

If the foreign manufacturer sells through an affiliated trading company, the authority may examine whether the parties are independent and whether the invoiced price reflects an arm’s-length transaction. Corporate charts, shareholder information, intercompany agreements and transfer-pricing records should be disclosed consistently.

The export-price calculation must reconcile to audited financial statements, general ledgers and shipment records. A spreadsheet without an audit trail is rarely sufficient.

Step Six: Establish the Normal Value

Normal value may be based on comparable home-market sales, a constructed value or another methodology permitted by the applicable rules.

The response should address:

• The volume and profitability of home-market sales;
• Whether sales were made in the ordinary course of trade;
• Customer and distribution-channel differences;
• Product comparability;
• Domestic taxes;
• Packaging and delivery costs;
• Production costs;
• Selling, general and administrative expenses;
• Financing expenses;
• Profit methodology;
• Related-party purchases;
• Below-cost sales, if alleged.

If there are no usable home-market sales, the manufacturer should explain why and provide reliable cost information or other relevant evidence. It should never simply leave the normal-value section blank.

Cost data should be prepared by product or product-control number wherever possible. Raw materials, labour, energy, depreciation, factory overhead and selling expenses should be supported by the company’s normal accounting records.

Step Seven: Calculate the Dumping Margin Carefully

The dumping margin is affected by the comparison between export price and normal value. Small errors in product matching, currency conversion, freight allocation or cost classification can produce a substantial difference.

Before submission, the manufacturer should test:

• Whether all Turkish sales are included;
• Whether cancelled or returned sales are properly explained;
• Whether quantities and units are consistent;
• Whether exchange rates match the authority’s instructions;
• Whether freight is allocated using a defensible method;
• Whether related-party transactions are separately identified;
• Whether negative or zero-value entries are correctly treated;
• Whether the final calculation reconciles to total company sales.

The authority’s calculation methodology should be followed exactly, while legal objections should be clearly reserved in the narrative response.

Step Eight: Respond to Injury and Causation Issues

Although foreign manufacturers do not control the domestic-industry data, they can present evidence showing that injury was caused by factors other than imports.

Relevant alternative causes may include:

• Declining domestic demand;
• Currency fluctuations;
• Increased energy or raw-material prices;
• Productivity problems;
• Outdated technology;
• Poor capacity utilisation;
• Management decisions;
• Changes in consumer preferences;
• Third-country imports;
• Domestic producers’ pricing strategy;
• Supply-chain disruptions.

The response should distinguish between price effects caused by imports and losses caused by independent market conditions. Public market studies, industry statistics, customer evidence and internal economic analyses may support this argument.

Confidential and Non-Confidential Versions

Sensitive commercial data should be identified as confidential only where there is a legitimate business reason. Typical confidential information includes:

• Customer names;
• Unit prices;
• Production costs;
• Profit margins;
• Formulas and technical specifications;
• Affiliate structures;
• Supplier terms;
• Strategic business plans.

A non-confidential version must still provide a meaningful understanding of the evidence. A statement such as “confidential business information” without a proper summary may be rejected.

The manufacturer should maintain a document showing:

• Which information is confidential;
• Why disclosure would cause competitive harm;
• What summary has been provided;
• Whether redaction is necessary;
• Whether consent to disclosure can be obtained.

Verification and Data Integrity

Turkish authorities may verify questionnaire data through documents, written questions, remote review or an on-site verification process.

The company should prepare:

• A reconciliation from questionnaire figures to audited accounts;
• A reconciliation from sales databases to invoices;
• Production and inventory reconciliations;
• Sample transaction files;
• Freight and insurance support;
• Cost-accounting explanations;
• Corporate ownership documents;
• Turkish or English translations where requested;
• A clear electronic data room.

Every figure in the questionnaire should be reproducible by an independent reviewer. Unsupported estimates and unexplained manual adjustments can undermine the entire response.

What Happens If the Manufacturer Cannot Provide Certain Data?

Data may be unavailable because of system changes, old accounting software, mergers, discontinued products or third-party record limitations. In that situation, the manufacturer should:

1. Identify the missing information precisely;
2. Explain why it is unavailable;
3. Describe the search undertaken;
4. Provide alternative documents;
5. Offer a reasonable estimation methodology;
6. Request guidance before the deadline;
7. Explain any limitations in the narrative response.

Silence is usually more damaging than a transparent explanation supported by alternative evidence.

Risks of a Late, Incomplete or Inconsistent Response

Failure to cooperate may lead to the use of facts available. Potential consequences include:

• A higher dumping margin;
• A country-wide or residual duty rate;
• Loss of an individual exporter margin;
• Adverse assumptions about product scope;
• Rejection of claimed adjustments;
• Reduced ability to challenge preliminary findings;
• Increased risk for Turkish importers;
• Difficulties in future review proceedings.

A late response may also prevent the authority from verifying the manufacturer’s data. Even where the company has strong substantive arguments, procedural non-compliance can produce an unfavourable result.

Provisional and Definitive Anti-Dumping Measures

Depending on the investigation, provisional measures may be imposed before the final determination. These may affect customs clearance through a duty, deposit or guarantee mechanism.

A definitive measure may apply to future imports for the period specified in the official decision. The manufacturer should immediately assess:

• Effective dates;
• Covered tariff codes;
• Product descriptions;
• Company-specific rates;
• Country-wide rates;
• Importer notification requirements;
• Potential retroactive collection;
• Review deadlines.

A price undertaking or another negotiated solution may be legally available in certain circumstances, but it should be evaluated carefully because it can create long-term pricing and reporting obligations.

Can the Anti-Dumping Result Be Challenged?

Yes. Possible remedies may include:

• Comments on preliminary findings;
• Comments on final disclosure;
• Requests for hearings or meetings;
• Administrative applications;
• Review applications;
• Scope or anti-circumvention proceedings;
• New-exporter or changed-circumstances reviews;
• Expiry or sunset reviews;
• Annulment proceedings before the administrative courts;
• Requests for suspension of execution.

The filing of a lawsuit does not automatically suspend collection of an anti-dumping duty. A suspension request generally requires a credible showing of apparent unlawfulness and serious harm that may be difficult to repair. The exact court, deadline and remedy depend on the legal nature of the decision and its notification or publication method.

For customs debts arising during import clearance, an objection under Article 242 of Customs Law No. 4458 may be relevant. Customs objections often involve strict deadlines, commonly calculated from lawful notification, so the specific notice must be reviewed immediately. The Official Turkish Legislation Portal should be checked for the current consolidated text of the applicable legislation.

2026 Compliance Priorities for Foreign Manufacturers

For 2026 investigations, manufacturers should focus on:

• Transaction-level data that can be audited quickly;
• Consistent product-control-number mapping;
• Origin and routing documentation;
• Related-party and transfer-pricing records;
• Electronic preservation of invoices and shipment documents;
• Prompt monitoring of Ministry notices;
• Separate confidential and non-confidential submissions;
• Turkish translation and power-of-attorney formalities;
• Early preparation for verification;
• Anti-circumvention risk management.

Companies should also review supply chains for transshipment, minor processing in third countries, inaccurate certificates of origin, product modification and indirect sales arrangements. These issues can create additional customs and penalty exposure even after the original investigation ends.

Practical Submission Checklist

Before filing, the manufacturer should confirm that:

• The response is submitted before the deadline;
• All questions have been answered;
• Any unavailable data is explained;
• All Turkish sales are included;
• Home-market sales are properly classified;
• Product codes match the investigation scope;
• Price adjustments are documented;
• Costs reconcile to accounting records;
• Affiliates are fully disclosed;
• Confidential claims are justified;
• Non-confidential summaries are meaningful;
• Calculations are independently reviewed;
• Supporting documents are indexed;
• Translations are accurate;
• A copy of the final submission is preserved.

Official Resources

Manufacturers should monitor the Ministry of Trade’s official anti-dumping and subsidy information page, review the Ministry’s application and questionnaire forms, and verify current legislation through the Official Turkish Legislation Portal.

Frequently Asked Questions (FAQ)

1. Does receiving a Turkish anti-dumping questionnaire mean that dumping has already been proven?

No. A questionnaire is part of the investigation process. It gives the manufacturer an opportunity to provide evidence regarding export price, normal value, injury and causation.

2. Can a foreign manufacturer request more time to answer?

Yes, an extension may be requested, but it is discretionary. The request should be submitted in writing before the original deadline and should explain why additional time is necessary.

3. What happens if the manufacturer submits an incomplete response?

The authority may reject unsupported information and use facts available. This can result in a higher dumping margin or an adverse country-wide rate.

4. Can confidential commercial information be withheld?

Confidential treatment may be requested for genuinely sensitive information. However, the manufacturer should provide a meaningful non-confidential summary.

5. What documents are usually required?

Common documents include invoices, sales ledgers, contracts, export declarations, freight records, production costs, inventory records, financial statements and affiliate agreements.

6. What if the manufacturer has no home-market sales?

The manufacturer should explain the situation and provide reliable cost data or other evidence relevant to the normal-value methodology. Leaving the section unanswered can create serious disadvantages.

7. Can a Turkish importer answer the questionnaire on behalf of the foreign manufacturer?

An importer may provide relevant market and transaction information, but the foreign manufacturer normally controls the production, cost and exporter data required for the dumping analysis.

8. Can provisional anti-dumping duties be challenged?

Potentially, yes. The available administrative and judicial remedies depend on the official decision, notification date and the specific legal basis of the measure.

9. How should a manufacturer prepare for verification?

It should create reconciliation schedules, preserve source documents, identify responsible employees, prepare sample transaction files and ensure that every reported figure can be independently reproduced.

10. When should a Turkish trade-remedies lawyer be appointed?

Counsel should be appointed immediately after the questionnaire is received, preferably before the response team begins preparing calculations. Early advice helps protect deadlines, confidentiality and legal objections.

Legal Disclaimer

The information provided in this article is for general informational purposes only and does not constitute legal advice. Laws and regulations may change, and each case depends on its specific facts. For advice regarding your situation, consult a qualified lawyer.

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

Expert Legal Support

Specialist legal support is essential to prevent loss of rights in a Turkish anti-dumping investigation. By working with a lawyer experienced in customs, trade-remedy and administrative disputes, foreign manufacturers can protect their commercial position in Turkey and internationally.

Fırat Fesih Kaya Law Office provides professional legal support for Turkish anti-dumping questionnaires, dumping-margin calculations, customs disputes, administrative applications, court proceedings and suspension-of-execution requests. Lawyer Fırat Fesih Kaya and his team assist foreign manufacturers, exporters, importers and international groups throughout the investigation process.

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

Turkish anti-dumping questionnaire, anti-dumping investigation Turkey, foreign manufacturer Turkey, dumping margin defense, Turkish customs lawyer, trade remedies Turkey, facts available defense, Fırat Fesih Kaya Law Office