Are NDAs enforceable in Turkey? Learn how Turkish law protects confidential information, trade secrets, personal data, and business know-how, including penalties, injunctions, damages, and cross-border enforcement in 2026

Non-disclosure agreements are widely used by foreign investors, technology companies, manufacturers, employers, consultants, distributors, shareholders, and international businesses operating in Turkey. They are designed to prevent confidential commercial information from being disclosed, copied, misused, or transferred to unauthorized third parties.

A properly drafted non-disclosure agreement is generally enforceable under Turkish law. However, enforceability depends on the scope of the protected information, the parties’ contractual obligations, the duration of confidentiality, applicable penalties, and whether the agreement complies with mandatory legal rules.

An excessively broad NDA that attempts to protect publicly available information, unlawfully restrict employment, or impose a disproportionate contractual penalty may be challenged before Turkish courts. For this reason, foreign companies should not rely on generic confidentiality templates without adapting them to Turkish commercial, contractual, employment, competition, and data protection law.

What Is a Non-Disclosure Agreement?

A non-disclosure agreement, commonly known as an NDA or confidentiality agreement, is a contract requiring one or more parties to protect confidential information received during a commercial or professional relationship.

An NDA may be:

• Unilateral, where only one party discloses confidential information;
• Mutual, where both parties exchange confidential information;
• Standalone, signed before negotiations begin;
• Integrated, included as a confidentiality section within another agreement.

NDAs are frequently used in:

• Merger and acquisition negotiations
• Investment discussions
• Technology licensing
• Software development
• Joint ventures
• Employment relationships
• Distribution and agency arrangements
• Manufacturing and supply contracts
• Franchise agreements
• Shareholder negotiations
• Consultancy relationships
• Commercial due diligence

Are NDAs Enforceable in Turkey?

Yes. NDAs are generally enforceable in Turkey under the principle of freedom of contract.

The Turkish Code of Obligations recognizes contracts formed through the parties’ mutual and corresponding declarations of intent. Parties are generally free to determine the contents of their agreement, provided that the terms do not violate mandatory law, public policy, morality, personal rights, or impossibility rules.

An NDA does not require notarization to be valid in most commercial situations. A written agreement signed by authorized representatives is normally sufficient. Electronic signatures may also be legally effective where the applicable electronic signature requirements are satisfied.

Nevertheless, written evidence is extremely important because the party alleging a breach must ordinarily prove:

• The existence of the confidentiality obligation;
• The information covered by the agreement;
• The other party’s access to that information;
• Unauthorized disclosure or use;
• The loss suffered;
• The connection between the breach and the loss.

Which Laws Apply to NDAs in Turkey?

Turkey does not have a single statute exclusively governing non-disclosure agreements. Their enforceability may involve several legal sources.

Turkish Code of Obligations

The Turkish Code of Obligations governs the formation, interpretation, performance, breach, termination, damages, and contractual penalty provisions of NDAs.

A party that breaches its contractual confidentiality obligations may be required to compensate the other party for losses caused by the breach.

Turkish Commercial Code

The Turkish Commercial Code protects businesses against unfair competition.

Unauthorized acquisition, disclosure, or exploitation of commercial secrets may constitute unfair competition, especially where a party improperly uses confidential business information, production secrets, customer data, pricing methods, or internal commercial documents.

The affected business may seek remedies such as:

• Determination of unlawful conduct;
• Prevention of continuing infringement;
• Elimination of the consequences;
• Compensation for financial loss;
• Recovery of profits obtained through the unlawful conduct;
• Publication of the judgment in appropriate cases.

Employment Law

Employees have statutory duties of loyalty and confidentiality. Confidentiality obligations may continue after employment ends where the information remains confidential and the employer has a legitimate interest in its protection.

However, an NDA should not be used as an unlimited prohibition preventing a former employee from using general professional knowledge, experience, or skills.

Where an employer intends to restrict competitive employment after termination, a separate and legally compliant non-compete clause may be required.

Personal Data Protection Law

Confidential information frequently contains personal data relating to employees, customers, suppliers, users, patients, or business contacts.

An NDA alone does not create a lawful basis for processing or transferring personal data. Companies must separately comply with Turkish Personal Data Protection Law No. 6698, including transparency, lawful processing, security, retention, and transfer obligations.

The Turkish Data Protection Authority defines personal data processing broadly to include collection, storage, alteration, disclosure, transfer, classification, and prevention of use.

Where confidential information is transferred abroad, the parties must also evaluate the cross-border data transfer regime. Standard contracts and binding corporate rules are among the safeguards available under the current framework.

What Information Can an NDA Protect?

An NDA may protect information that has genuine commercial, technical, financial, or strategic value and is not generally available to the public.

Protected information may include:

• Business plans
• Pricing policies
• Customer and supplier lists
• Source code
• Algorithms
• Technical specifications
• Product designs
• Manufacturing methods
• Financial statements
• Market research
• Trade strategies
• Investment information
• Due diligence documents
• Internal correspondence
• Marketing plans
• Passwords and access credentials
• Commercial know-how
• Research and development results
• Unpublished intellectual property
• Negotiation documents

The definition of confidential information should be sufficiently detailed. A clause stating that “all information is confidential” may create uncertainty and weaken enforceability.

What Information Is Usually Excluded?

Well-drafted NDAs normally exclude information that:

• Was publicly available when disclosed;
• Becomes public without a breach;
• Was already lawfully known by the recipient;
• Was independently developed without using confidential information;
• Was lawfully received from another source;
• Must be disclosed under legislation, a court order, or an official authority’s request;
• Is disclosed with the written consent of the information owner.

Where disclosure is legally required, the NDA should oblige the receiving party to notify the disclosing party in advance, unless notification is legally prohibited.

Essential Clauses in an Enforceable NDA

A commercially effective NDA should address the following matters clearly.

Definition of Confidential Information

The agreement should identify the information being protected and specify whether oral, written, electronic, technical, or visual disclosures are covered.

Permitted Purpose

The recipient should be allowed to use confidential information only for a defined purpose, such as evaluating an investment, providing consultancy services, or performing a commercial contract.

Authorized Recipients

The NDA should state whether information may be shared with employees, directors, affiliates, lawyers, accountants, banks, investors, or subcontractors.

Recipients should generally be limited to persons who genuinely need access.

Security Measures

The agreement may require:

• Restricted access;
• Password protection;
• Encryption;
• Secure document storage;
• Prohibition of copying;
• Internal access logs;
• Employee confidentiality undertakings;
• Immediate breach notification.

An NDA is more persuasive when the information owner also takes reasonable practical steps to preserve secrecy.

Duration

Some confidentiality obligations apply for a fixed period, such as two, three, or five years. Others may continue for as long as the relevant information remains a trade secret.

A permanent obligation may be enforceable for genuine trade secrets, but it may be considered excessive for ordinary commercial information that loses value over time.

Return and Destruction of Information

The NDA should explain what happens when negotiations or the commercial relationship end.

The recipient may be required to:

• Return physical records;
• Delete electronic copies;
• Destroy backups where technically possible;
• Confirm destruction in writing;
• Preserve documents that must legally be retained.

Governing Law and Jurisdiction

Cross-border NDAs should clearly identify:

• Applicable law;
• Competent courts;
• Arbitration institution;
• Seat of arbitration;
• Language of proceedings;
• Rules for interim relief.

Poorly drafted dispute resolution clauses may cause costly jurisdictional disputes before the merits are examined.

Contractual Penalties for Breach of an NDA

Many NDAs include a contractual penalty payable if confidentiality is breached.

Contractual penalties are generally recognized under Turkish law. They may be especially useful because the precise financial damage caused by disclosure is often difficult to calculate.

However, a Turkish court may reduce a contractual penalty that is considered excessive. The enforceability of the penalty may depend on:

• The commercial status of the parties;
• The seriousness of the breach;
• The value of the protected information;
• The amount of actual or potential damage;
• The parties’ bargaining power;
• The proportionality of the penalty.

Foreign companies should avoid using unrealistically high penalty amounts that may later be reduced or challenged.

Can Damages Be Claimed in Addition to a Penalty?

The answer depends on the wording of the agreement and the circumstances of the breach.

An NDA should clearly state whether the innocent party may claim:

• The contractual penalty;
• Actual damages exceeding the penalty;
• Lost profits;
• Investigation expenses;
• Legal costs;
• Costs of technical remediation;
• Reputation-related losses;
• Profits obtained by the breaching party.

Proving indirect losses or future profits may require accounting records, technical analysis, expert reports, customer evidence, and market data.

Interim Injunctions and Urgent Legal Protection

Financial compensation may not be sufficient where sensitive information is about to be disclosed or continues to be used unlawfully.

The affected party may seek urgent judicial protection to:

• Prevent disclosure;
• Stop unauthorized use;
• Preserve digital evidence;
• Restrict access to files;
• Secure relevant records;
• Prevent further commercial exploitation.

An applicant seeking interim relief must usually demonstrate urgency, a credible legal right, and the risk of serious or difficult-to-repair harm.

Prompt action is essential. Delay may make it more difficult to prove urgency.

Is an NDA Enforceable Against Employees?

Yes, confidentiality clauses may be enforceable against employees, particularly regarding:

• Trade secrets;
• Customer databases;
• Pricing information;
• Technical processes;
• Internal financial information;
• Strategic plans;
• Passwords and system access information.

However, confidentiality provisions should not attempt to prevent employees from:

• Reporting criminal conduct;
• Cooperating with public authorities;
• Exercising statutory rights;
• Using general occupational experience;
• Disclosing information protected under mandatory law.

A confidentiality clause and a non-compete clause serve different purposes. Restricting a former employee’s future employment generally requires compliance with the separate legal rules governing non-compete obligations.

NDAs in Due Diligence and M&A Transactions

NDAs are particularly important during mergers, acquisitions, and investment negotiations because potential buyers may receive highly sensitive financial, operational, employment, tax, intellectual property, and customer information.

A due diligence NDA should regulate:

• Access to the virtual data room;
• Authorized advisers;
• Personal data processing;
• Prohibition of direct customer contact;
• Non-solicitation obligations;
• Use of transaction information;
• Return or destruction of documents;
• Announcements and publicity;
• Remedies if the transaction does not proceed.

The disclosure of data during due diligence must remain compatible with personal data protection requirements. A confidentiality clause does not automatically authorize unrestricted disclosure of employee or customer data.

Cross-Border NDAs and Foreign Companies

Foreign companies may sign NDAs governed by Turkish law or foreign law. Turkish courts may generally recognize the parties’ governing-law choice, subject to mandatory rules and public policy.

Where the recipient, confidential information, business operations, or harmful disclosure is connected to Turkey, Turkish legal remedies may become relevant even if the agreement has an international character.

For cross-border agreements, the parties should also address:

• Translation issues;
• Service of notices;
• Foreign evidence;
• International arbitration;
• Enforcement of foreign judgments;
• Cross-border personal data transfers;
• Disclosure to overseas affiliates.

Personal Data and Confidentiality in 2026

As of 2026, companies must pay particular attention to the distinction between contractual confidentiality and statutory data protection compliance.

Where an NDA involves personal data:

• The parties’ roles should be identified;
• The lawful basis for processing should be determined;
• Data subjects should receive the required information;
• Security measures should be implemented;
• Retention periods should be defined;
• Cross-border transfers should be separately assessed.

The Turkish Data Protection Authority states that a data controller is the person or entity determining the purposes and means of personal data processing.

The Authority also requires transparency notices to identify matters such as processing purposes, transfer recipients, collection methods, legal grounds, and the rights of data subjects.

A 2026 principle decision further emphasized that transparency notices and consent declarations must be presented separately where processing relies on explicit consent.

Therefore, inserting a general statement into an NDA that “all parties consent to data processing” may be legally insufficient.

Common Reasons NDAs Become Difficult to Enforce

An NDA may become ineffective or difficult to enforce where:

• Confidential information is defined too broadly;
• The information is already public;
• The owner failed to protect the information;
• The agreement has no permitted-purpose clause;
• The alleged breach cannot be proved;
• The penalty is disproportionate;
• The duration is unreasonable;
• The agreement conflicts with mandatory law;
• The signatory lacked authority;
• Personal data rules were ignored;
• The dispute resolution clause is defective;
• The protected information cannot be distinguished from general knowledge.

Practical Recommendations for Foreign Businesses

Foreign companies should:

• Use a Turkey-specific NDA rather than a generic international template;
• Define confidential information precisely;
• Identify permitted recipients;
• Limit use to a stated commercial purpose;
• Regulate personal data separately;
• Include proportionate penalties;
• Preserve evidence of disclosure;
• Mark sensitive documents as confidential;
• Control data-room access;
• Use secure file-sharing systems;
• Obtain legal advice before disclosure;
• Act immediately when a breach is suspected.

Conclusion

Non-disclosure agreements are generally enforceable under Turkish commercial law when they are clear, proportionate, and compatible with mandatory legal rules.

Their effectiveness depends not only on contractual wording but also on whether the information is genuinely confidential, whether the owner took reasonable security measures, and whether the breach can be proved.

Foreign companies should also remember that an NDA is not a substitute for compliance with Turkish personal data protection, employment, competition, intellectual property, or procedural law. A carefully drafted agreement, supported by practical information-security measures, offers significantly stronger protection than a generic confidentiality clause.

Frequently Asked Questions

1. Are NDAs legally binding in Turkey?

Yes. NDAs are generally legally binding where they satisfy the requirements of Turkish contract law and do not violate mandatory law, public policy, morality, or personal rights.

2. Must an NDA be notarized in Turkey?

Usually no. A written agreement signed by authorized representatives is generally sufficient. Notarization may nevertheless provide evidential advantages in certain disputes.

3. Can an NDA protect trade secrets permanently?

Potentially yes. A confidentiality obligation concerning a genuine trade secret may continue while the information remains secret and commercially valuable. Ordinary information may justify a shorter period.

4. Can a Turkish court reduce an NDA penalty?

Yes. A court may reduce a contractual penalty considered excessive, depending on the circumstances and applicable rules.

5. Can damages be claimed without a contractual penalty?

Yes. A party may claim proven damages caused by the breach even where the NDA contains no penalty clause.

6. Can an injunction stop confidential information from being disclosed?

Yes. Urgent interim relief may be available where disclosure is imminent or continuing and may cause serious harm.

7. Does an NDA permit personal data to be transferred abroad?

No. Cross-border personal data transfers must independently comply with Turkish data protection law. The NDA alone is not a sufficient transfer mechanism.

8. Are employee confidentiality clauses enforceable after resignation?

They may remain enforceable for genuine trade secrets and confidential business information. They cannot normally prevent a former employee from using general professional knowledge and experience.

9. Can an NDA governed by foreign law be enforced in Turkey?

Potentially yes, subject to Turkish private international law, mandatory rules, public policy, and the validity of the governing-law and dispute resolution clauses.

10. What evidence is required in an NDA dispute?

Important evidence may include the signed agreement, disclosure records, emails, access logs, downloaded files, expert reports, witness statements, financial documents, and evidence of actual or threatened misuse.

Legal Support for Confidentiality and Trade Secret Disputes

Confidential information may represent one of a company’s most valuable commercial assets. An unclear NDA or delayed response to a breach can lead to the loss of customers, technology, investment opportunities, competitive advantage, and business reputation.

Fırat Fesih Kaya Law Office provides legal support to foreign companies, investors, employers, technology businesses, executives, and entrepreneurs concerning NDA preparation, trade secret protection, data confidentiality, breach investigations, interim injunctions, compensation claims, and cross-border commercial disputes in Turkey.

Receiving a legal assessment tailored to your specific commercial relationship can help prevent avoidable losses and strengthen the enforceability of your confidentiality arrangements.

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

Disclaimer: This article provides general legal information and does not constitute legal advice. The enforceability of an NDA depends on its wording, the nature of the confidential information, the parties’ conduct, and the specific circumstances of each dispute.