Introduction
Responding to a Turkish Competition Authority investigation requires immediate organization, legal precision and strategic discipline. A competition investigation in Turkey can affect a company’s documents, employees, pricing practices, distribution contracts, digital systems, internal communications, management decisions, merger transactions and reputation. The process may begin with an on-site inspection, an information request, a complaint, a preliminary inquiry, a formal investigation notice or a sector-wide examination.
The main statute is Law No. 4054 on the Protection of Competition. The law aims to prevent agreements, decisions and practices that restrict competition, prohibit abuse of dominance and regulate mergers and acquisitions that may significantly lessen competition in Turkish markets. The current consolidated version reflects amendments up to Law No. 7511, which introduced changes to Articles 43 and 45 governing investigation procedure and defense stages.
A company under investigation must understand that the Turkish Competition Authority is not merely requesting ordinary commercial information. The Authority may be examining possible violations such as cartels, resale price maintenance, information exchange, bid rigging, abuse of dominance, no-poach agreements, wage-fixing, digital platform conduct, data-related practices, merger control violations or obstruction of an on-site inspection. The company’s response must therefore protect defense rights while avoiding any act that may be interpreted as obstruction, concealment or misleading information.
1. Do Not Treat the First Contact as Routine
The first contact from the Turkish Competition Authority may come in different forms. It may be an official information request, an invitation to submit explanations, a dawn raid, a preliminary inquiry notification, or a formal investigation notice. Each requires a different response.
The first mistake companies make is treating the matter as a routine regulatory correspondence. A competition investigation can lead to administrative fines of up to 10% of annual gross revenues for violations of Articles 4, 6 or 7 of Law No. 4054; Article 16 also provides separate fines for issues such as incomplete or misleading information and obstruction of on-site inspections.
The company should immediately notify internal legal, external competition counsel, senior management and relevant business units. It should preserve documents, identify the scope of the request or inspection, and avoid informal internal speculation. From the first moment, the company must assume that emails, chats, pricing files, meeting notes, CRM records, HR data and digital documents may later become evidence.
2. Establish an Internal Response Team
A Turkish competition investigation requires a coordinated internal response team. This team should usually include legal counsel, compliance officers, IT personnel, relevant business managers, HR if labor-market issues are involved, finance if pricing or cost issues are involved, and communications personnel if public disclosure may become necessary.
The response team should have clear responsibilities. Legal counsel should control legal strategy and privilege-sensitive communications. IT should assist with data preservation and electronic document access. Business teams should explain commercial context. Compliance should coordinate internal recordkeeping. Senior management should avoid contacting employees casually about the substance of the investigation unless instructed by counsel.
A company should not allow uncontrolled internal messaging. Employees may panic and delete documents, create misleading explanations, contact competitors or discuss the investigation in informal chats. All of these can worsen the situation.
3. Preserve Documents Immediately
Document preservation is critical. Once the company becomes aware of a Turkish Competition Authority investigation or possible inquiry, it should suspend routine deletion of relevant emails, messages, files and records. It should preserve physical and electronic documents, including WhatsApp messages, Teams chats, Slack channels, mobile phone data, cloud storage, shared folders, pricing files, HR records, meeting minutes and internal presentations.
The company should issue an internal legal hold notice in clear language. Employees should be told not to delete, alter, destroy or conceal documents. The notice should also explain that ordinary cleanup of emails or messaging applications must stop for relevant custodians.
Document destruction after an investigation begins can be interpreted severely. Even where the company believes the deleted material was irrelevant, deletion may create obstruction concerns and damage credibility.
4. Responding to an On-Site Inspection
An on-site inspection, often called a dawn raid, is one of the most urgent stages of a Turkish competition investigation. Article 15 of Law No. 4054 grants the Competition Board authority to conduct inspections at undertakings and associations of undertakings, examine books and documents, request explanations and inspect assets where necessary for its duties. The 2026 Constitutional Court decision confirmed that the Board’s on-site inspection authority under Article 15 remains in force in its current form, and that where inspection is obstructed or there is a likelihood of obstruction, inspection may be carried out with a criminal judgeship decision.
When officials arrive, reception should immediately contact the designated dawn raid team. The company should verify the officials’ identity and authorization documents, escort them to a meeting room, contact external competition counsel and cooperate calmly. The company should not delay access unlawfully while waiting for counsel, but counsel should be contacted immediately.
Employees must not delete emails, close applications, hide phones, disconnect servers, refuse access without legal basis or provide misleading explanations. At the same time, the company should carefully record what is inspected, what is copied, which employees are interviewed and what explanations are requested.
5. Protect Legal Privilege and Confidentiality
During an on-site inspection, companies should be careful about documents that may contain attorney-client communications or trade secrets. Turkish practice has specific rules and debates around legal privilege, especially for communications with independent external counsel. The company should identify potentially privileged materials and raise objections respectfully through counsel.
Trade secrets and commercially sensitive data should also be identified. However, confidentiality does not automatically justify refusing access to Authority officials. The correct approach is to cooperate while recording confidentiality claims and requesting appropriate protection in the file.
A company should never use privilege or confidentiality claims as a disguised obstruction tactic. Claims must be specific, legitimate and legally grounded.
6. Internal Interviews and Fact-Finding
After the first contact or on-site inspection, the company should conduct an internal fact-finding process. This should be led by counsel and should focus on understanding what happened, which employees were involved, what documents exist, whether competitors were contacted, whether pricing or HR decisions were coordinated, whether distribution practices created risks, and whether the company has a credible defense.
Internal interviews should be structured. Interviewers should explain that the purpose is to provide legal advice and establish facts. Employees should be told to be truthful, not to speculate and not to discuss the interview with others unless instructed.
The company should compare employee explanations with documents. In competition investigations, written records often decide the case. A business explanation that contradicts emails or chat messages may weaken the defense.
7. Responding to Information Requests
The Turkish Competition Authority may request information and documents during preliminary inquiries and investigations. Responses must be accurate, complete and timely. Providing incomplete, false or misleading information, or failing to provide requested information, can trigger separate administrative fines under Law No. 4054. Article 16 and Article 17 provide sanctions for incomplete, false or misleading information, failure to provide information and obstruction-related conduct.
A company should not rush to answer without understanding the request. It should identify the deadline, clarify ambiguous terms if necessary, collect data from relevant custodians, verify accuracy, preserve supporting records and ensure consistency with previous submissions.
If the requested information is unavailable, the company should explain why. If the request is too broad or technically difficult, counsel may seek clarification or extension where procedurally possible. The response should not include unnecessary admissions, speculative explanations or unreviewed employee comments.
8. Understand the Investigation Notice
If the Competition Board decides to open a formal investigation, the undertaking will receive an investigation notice. After the 2024 amendments introduced by Law No. 7511, the Board must notify undertakings against whom an investigation has been initiated within 15 days, together with sufficient information on the type and nature of the allegations; the former obligation to submit a first written defense at this early notification stage has been abolished.
This change is important. The investigation notice indicates that the Board has decided to investigate, but the detailed allegations and evidence are usually developed in the investigation report. Companies should still analyze the notice carefully. It identifies the general scope, possible legal theory, relevant markets and suspected conduct.
The company should begin building its defense immediately, even though the main written defense will come after the investigation report. Waiting until the report is served may leave too little time to collect documents, prepare economics, interview employees and organize legal arguments.
9. Defense Rights Must Be Actively Protected
Defense rights are central in Turkish competition investigations. Article 44(3) of Law No. 4054 provides that the Board may not base its decisions on issues about which the parties have not been informed and granted the right of defense. The investigated undertaking must be given the opportunity to submit defenses.
This principle should be used actively. If the Authority relies on new allegations, documents, economic analysis or legal theories, the undertaking should request the opportunity to respond. If access to file is insufficient, the company should raise the issue. If confidential evidence is used in a way that prevents meaningful defense, counsel should object.
A strong defense is not only about denying infringement. It is also about ensuring that the procedure is fair, that the company understands the case against it, and that all exculpatory evidence is placed before the Board.
10. The Investigation Report and Written Defense
The investigation report is usually the most important document in the administrative phase. It sets out the case team’s findings, legal assessment, evidence and proposed conclusions. Under the amended Article 45 framework, parties are notified to submit written defenses within 30 days after notification of the investigation report, and this period may be extended once if justified reasons are presented. If the case team changes its opinion after reviewing the written defenses, it must notify its written opinion within 15 days, and the parties may respond within 30 days.
The written defense should be comprehensive, evidence-based and structured. It should address jurisdiction, market definition, legal characterization, evidence, economic analysis, procedural objections, limitation issues, individual liability, mitigating factors and fine calculation.
A good defense does not ignore bad documents. It explains them in context, distinguishes lawful conduct from unlawful interpretation and identifies gaps in the Authority’s theory. If the case involves pricing, dominance, digital markets, algorithms, labor markets or merger control, economic evidence may be necessary.
11. Oral Hearing Strategy
In significant investigations, an oral hearing may become strategically important. The oral hearing is not a formality. It is an opportunity to present the core defense directly to the Board, clarify technical issues, respond to the case team’s position and emphasize legal weaknesses.
The oral hearing presentation should be concise and focused. It should not repeat the entire written defense. It should identify the decisive points: absence of agreement, independent commercial rationale, lack of dominance, no foreclosure, no effect on competition, procedural violation, unreliable evidence or disproportionate fine.
Company executives should be prepared carefully if they will speak. They should not improvise beyond the agreed strategy. In complex matters, economists and technical experts may also play an important role.
12. Commitment Mechanism
The commitment mechanism may be available for certain competition concerns under Articles 4 and 6 of Law No. 4054. Article 43(3) allows investigated undertakings to offer commitments during preliminary inquiry or investigation stages, but hard-core restrictions such as price fixing between competitors, customer or territory allocation and supply restriction do not fall within the commitment mechanism. Commitments may be behavioral or structural, and the request must be submitted in writing within the relevant procedural framework.
Commitments can be useful where the company does not accept an infringement but wants to address competition concerns quickly and avoid a full infringement decision. For example, a platform may revise access rules, a supplier may remove restrictive clauses, or a dominant undertaking may offer non-discrimination commitments.
However, commitments are not suitable for every case. They should be realistic, monitorable, proportionate and commercially workable. A vague commitment may be rejected. An overly broad commitment may damage the business more than litigation.
13. Settlement Procedure
Settlement is different from commitment. In settlement, the investigated undertaking accepts the existence and scope of the infringement and may receive a reduction in the administrative fine. Settlement may be strategically attractive where evidence is strong and the company wants to reduce uncertainty, cost and reputational damage.
However, settlement has consequences. It involves acceptance of infringement and may affect follow-on damages claims, public perception and judicial review options. The company should assess evidence strength, fine exposure, private litigation risk, global investigations, management responsibility and future compliance obligations before entering settlement discussions.
Settlement should not be treated as a default shortcut. It is a strategic decision requiring board-level understanding.
14. Leniency and Active Cooperation in Cartel Cases
If the investigation involves cartel conduct such as price fixing, customer allocation, market sharing, bid rigging or certain no-poach arrangements, leniency or active cooperation may be relevant. The first qualifying applicant may receive the strongest protection, while later applicants may obtain reductions depending on timing and value of evidence.
Leniency is time-sensitive. If internal review reveals cartel evidence, the company must act immediately. Delay may mean losing the opportunity to another participant. The company should preserve evidence, stop unlawful conduct, avoid tipping off competitors and seek urgent competition law advice.
Leniency can reduce administrative exposure, but it may also increase civil damages risk and requires careful coordination with other jurisdictions if the conduct is cross-border.
15. Managing Employees During the Investigation
Employees are often the source of both risk and defense. Sales teams, pricing teams, HR, procurement, executives, distributor managers, tender teams and platform teams may hold critical information.
The company should instruct employees not to discuss the investigation externally, not to contact competitors, not to delete documents and not to create new explanations without counsel. Employees should be told that the company expects truthful cooperation.
If individual employees may have personal exposure, conflict issues may arise. The company may need to consider whether separate counsel is appropriate for certain individuals. Management should also avoid retaliation against employees who provide truthful information.
16. Communications and Reputation Management
Competition investigations can become public, especially in high-profile sectors such as digital platforms, retail, pharmaceuticals, banking, automotive, labor markets and public tenders. The Turkish Competition Authority may publish announcements about investigations, commitments, settlements and final decisions.
The company should prepare a communication plan. Public statements should be accurate, cautious and consistent with legal strategy. They should not deny facts that documents may contradict. They should not attack the Authority. They should not disclose confidential strategy.
Investor relations, customers, distributors, employees and business partners may need tailored communications. If the company is listed, capital markets disclosure obligations may also need to be considered.
17. Fine Exposure and Mitigating Factors
Fine exposure should be analyzed early. Law No. 4054 sets significant administrative fine exposure for substantive infringements and procedural violations. Article 16 provides fines up to 10% of annual gross revenues for undertakings that violate Articles 4, 6 or 7, and separate fines for issues such as obstruction of on-site inspections or failure to provide information.
The company should identify possible aggravating and mitigating factors. Mitigating elements may include limited involvement, short duration, termination of conduct, cooperation, compliance efforts, lack of implementation, corrective actions or settlement reduction. Aggravating factors may include recidivism, leadership role, obstruction, long duration or continued infringement after warning.
A defense should address fine calculation separately from liability. Even if the company contests infringement, it should preserve alternative arguments for proportionality and reduction.
18. Judicial Review of the Final Decision
If the Turkish Competition Board issues an adverse final decision, the company may challenge it before the administrative courts. Judicial review does not automatically suspend implementation or collection of the administrative fine, so a stay of execution request may be necessary in appropriate cases. Law No. 4054 states that lawsuits against administrative sanctions are filed before the competent administrative courts and that judicial review does not cease implementation of Board decisions or collection of administrative fines.
A judicial review strategy should be prepared before the final decision is issued. The administrative defense file should preserve all procedural objections and substantive arguments. Courts will review legality, procedure, evidence, reasoning, proportionality and defense rights.
The petition should not merely repeat business dissatisfaction. It should identify legal errors, evidentiary gaps, procedural violations, incorrect market analysis, unsupported economic reasoning and fine calculation errors.
19. Follow-On Damages Risk
A competition infringement decision may trigger private damages claims. Customers, competitors, suppliers, employees or public authorities may allege that they suffered loss due to anti-competitive conduct. In cartel, bid rigging, resale price maintenance, wage-fixing or abuse of dominance cases, damages exposure may become as important as administrative fines.
The company should consider damages risk when deciding whether to settle, admit infringement, challenge the decision or make public statements. Documents created during the defense process should be managed carefully. Civil litigation strategy should be coordinated with administrative defense.
A company should also review insurance coverage, indemnities, distributor contracts, employment issues and shareholder reporting obligations.
20. Remediation and Compliance After the Investigation
Whether the investigation ends with no infringement, commitments, settlement or an adverse decision, the company should implement remedial measures. These may include contract revisions, pricing policy changes, HR compliance rules, distributor training, dawn raid protocols, data governance, platform rule changes, internal audits and disciplinary measures.
A credible compliance program can reduce future risk and may support mitigation in later proceedings. It should be practical, not merely a written policy. Sales employees should know what they cannot discuss with competitors. HR should understand no-poach and wage-fixing rules. Distribution teams should avoid resale price maintenance. Digital teams should understand data and algorithmic risks. Management should know when to seek legal review.
21. Practical Checklist for Companies Under Investigation
A company facing a Turkish Competition Authority investigation should immediately:
Identify the procedural stage and legal basis of the request or inspection.
Notify internal and external competition counsel.
Preserve documents and suspend deletion.
Set up an internal response team.
Control employee communications.
Cooperate during on-site inspections without obstructing.
Record copied documents and explanations requested.
Review privilege and confidentiality issues carefully.
Conduct internal fact-finding under counsel supervision.
Respond to information requests accurately and on time.
Prepare a defense plan before the investigation report.
Evaluate commitment, settlement or leniency options.
Assess fine exposure and private damages risk.
Prepare for oral hearing and possible judicial review.
Implement remediation and compliance improvements.
22. Common Mistakes to Avoid
The most dangerous mistake is obstruction. Deleting messages, delaying officials, hiding phones, refusing access without legal basis or misleading inspectors can create separate liability.
The second mistake is submitting rushed and inaccurate information. Once a response is filed, inconsistencies may be used against the company.
The third mistake is ignoring internal bad documents. The defense must address difficult evidence directly.
The fourth mistake is allowing business teams to manage the response without competition counsel.
The fifth mistake is treating settlement or commitment as automatically beneficial. Each mechanism has legal and commercial consequences.
The sixth mistake is failing to think about private damages and judicial review from the beginning.
Conclusion
Responding to a Turkish Competition Authority investigation requires speed, discipline and strategic legal analysis. Law No. 4054 gives the Authority broad powers to investigate restrictive agreements, abuse of dominance, merger control violations and procedural infringements. It also gives the Board authority to conduct on-site inspections, request information, impose administrative fines and adopt remedies. The 2024 amendments to Articles 43 and 45 changed the defense timeline by abolishing the former first written defense stage and restructuring the written defense process after the investigation report.
The company’s first priorities should be cooperation, document preservation, accurate information management and protection of defense rights. During dawn raids, employees must cooperate without obstructing; following the 2026 Constitutional Court decision, the Board’s on-site inspection authority under Article 15 continues to remain in force in its current form.
A strong investigation response combines procedural protection with substantive defense. The company must understand the alleged conduct, review evidence, prepare economic and legal arguments, consider commitments or settlement where appropriate, assess leniency in cartel cases, manage employees and preserve judicial review options. The final goal is not only to respond to the Authority, but also to protect the company from fines, follow-on damages, reputational harm and future compliance failures.
For undertakings operating in Turkey, the safest approach is preparation before an investigation begins. A dawn raid manual, competition compliance training, document retention policy, HR antitrust guidance, distributor communication rules, pricing review procedures and data governance controls can determine whether a company responds confidently or loses control in the first critical hours of an investigation.
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