Thailand Trade Secrets Law: Protection, Infringement and Enforcement

Confidential business information is often among a company’s most valuable assets. Manufacturing processes, technical know-how, formulas, customer lists, pricing strategies, software source code, and other proprietary information can provide a significant competitive advantage if kept confidential. Unlike patents, trade secrets are not protected through registration. Their legal protection depends largely on the information remaining secret and on the business taking reasonable measures to maintain its confidentiality.

The Trade Secrets Act B.E. 2545 (2002) provides legal protection against the unauthorized acquisition, disclosure, or use of trade secrets and offers both civil and criminal remedies in appropriate circumstances. For businesses operating in Thailand or entering the Thai market, understanding the scope of trade secret protection is essential for managing commercial risks and safeguarding valuable intellectual property. 

Purpose of Thailand Trade Secrets Law

The Trade Secrets Act aims to protect confidential commercial information that business operators have developed, collected or maintained through effort, investment, experience, research or business resources. The Act seeks to prevent unfair conduct in business, particularly the unauthorized disclosure, taking or use of trade secrets. By protecting confidential business information, the Act supports fair competition, encourages commercial investment, and helps maintain a balanced economic environment.

Trade secret protection also serves the interests of consumers by encouraging businesses to develop better products, services, technology, processes and commercial methods without the risk that competitors may unfairly exploit confidential information.

Scope of Protection

The Trade Secrets Act recognizes the rights of trade secret owners and provides legal remedies against infringement. The Act covers several key matters, including:

• The legal meaning of trade secrets;
• Rights of trade secret owners;
• Authorization and transfer of trade secret rights;
• Acts that may constitute trade secret infringement;
• Exceptions that are not treated as infringement;
• Court protection and provisional measures;
• Mediation or settlement of trade secret disputes;
• Limitation periods for bringing claims; and
• Criminal penalties for certain offences.

The Act protects not only confidential information itself, but also the legal control, commercial use and fair exploitation of that information.

Authorities Responsible for Trade Secret Matters

Thailand trade secrets law involves the Trade Secrets Board and competent officials:

Trade Secrets Board (Department of Intellectual Property)

The Trade Secrets Board has important policy, advisory and dispute-resolution functions. The Board consists of the Permanent Secretary of the Ministry of Commerce as Chairperson, the Director-General of the Department of Intellectual Property (DIP) as Vice-Chairperson, relevant government officials, and qualified experts from fields such as agriculture, law, commerce, medicine or other relevant areas. The Act also requires the appointment of private-sector experts.

The Board has authority to propose opinions on policies and measures for trade secret protection and technology transfer policies relating to trade secrets. It may also provide recommendations to the Minister of Commerce concerning ministerial regulations and rules under the Act.

Where the parties request assistance, the Board may mediate or settle trade secret disputes before the matter proceeds to court.

Competent Officials

Competent officials have powers in relation to criminal cases under the Act. Where there is reasonable suspicion that documents or objects connected with an offence may be moved or destroyed before a search warrant can be obtained, competent officials may enter buildings, offices, production sites, storage places or vehicles to search or inspect, within the limits prescribed by law.

Competent officials may also seize or attach documents or objects connected with an offence for the purpose of legal proceedings, subject to the statutory period and conditions. Persons involved must provide reasonable assistance to competent officials in the performance of their duties.

What is a trade secret in Thailand?

A trade secret is commercial information that meets the requirements under the Act. In general, information may qualify as a trade secret if it has three key characteristics:

• It is not generally known or readily accessible to persons who normally deal with that type of information;
• It has commercial value because it is secret; and
• The person controlling the information has used appropriate measures to keep it confidential.

All three elements are important. Information is not protected merely because a business considers it important. It must be confidential, commercially valuable because of that confidentiality, and subject to appropriate measures to maintain secrecy.

Examples of Trade Secrets

Trade secrets may take many forms depending on the nature of a business and the industry in which it operates. They can include technical information, such as manufacturing processes, formulas, technical know-how, research and development data, and search engine algorithms, as well as commercial information, including customer lists, sources of raw materials, business methods, internal operating procedures, service delivery methods, and marketing or commercial strategies. 

Whether particular information qualifies as a trade secret depends on the specific facts of each case, including whether it is genuinely confidential, has commercial value because of its secrecy, and is protected by reasonable measures to maintain its confidentiality.

Appropriate Measures to Maintain Confidentiality

A key requirement under the Act is that the person controlling the information must use appropriate measures to keep it confidential. Appropriate measures may include physical, technical, contractual and organizational controls, such as:

• Restricted access to confidential documents or systems;
• Secure storage areas or locked cabinets;
• Password protection and encryption;
• Confidentiality agreements;
• Non-disclosure agreements;
• Access logs and internal authorization controls;
• Employee confidentiality policies;
• Document classification;
• Data room controls;
• Exit procedures for departing employees; and
• Restrictions on copying, downloading or transferring sensitive information.

In practice, businesses should not rely only on asserting that information is confidential. They should be able to show that they treated the information as confidential before the dispute occurred.

This issue often becomes central in trade secret disputes because a court may consider whether the business used reasonable and appropriate measures to protect the information.

Rights of Trade Secret Owners

• A trade secret owner has the right to disclose, take or use the trade secret. The owner may also authorize another person to disclose, take or use the trade secret, subject to conditions requiring the information to remain confidential.
• A trade secret owner may also transfer trade secret rights to another person. A transfer of trade secret rights, other than inheritance, must be made in writing and signed by both the transferor and the transferee. If the transfer agreement does not specify a period, the transfer is deemed to be for a period of 10 years.
• These rules are important in commercial transactions involving confidential information, including technology transfer, manufacturing arrangements, licensing, joint ventures, mergers and acquisitions, research cooperation and business sales.

Trade Secret Infringement

Trade secret infringement generally involves the unauthorized disclosure, taking or use of a trade secret without consent and in a manner contrary to honest commercial practices. Examples of conduct that may constitute trade secret infringement include:

• Theft or espionage of confidential information;
• Copying electronic files;
• Photocopying confidential documents;
• Taking photographs of confidential materials;
• Oral disclosure of confidential information;
• Disclosure to the public or competitors;
• Use of trade secrets for personal or commercial benefit;
• Breach of a non-disclosure agreement;
• Inducing a person who knows the secret to disclose it; and
• Obtaining trade secrets through bribery, threats, fraud, theft, receiving stolen property, electronic espionage or other improper means.

Trade secret disputes often arise in commercial situations involving employees, former employees, directors, contractors, consultants, suppliers, business partners, distributors, licensees or competitors.

Breach of Non-Disclosure Agreements

A breach of a non-disclosure agreement may support a trade secret claim where the breach involves unauthorized disclosure, taking or use of protected confidential information.

However, contractual confidentiality protection and statutory trade secret protection should work together. A well-drafted confidentiality agreement can strengthen trade secret protection by clearly defining confidential information, limiting permitted use, restricting disclosure, requiring return or destruction of materials, and preserving remedies for breach.

Businesses should review whether their confidentiality agreements are suitable for Thailand and whether their internal practices support the confidentiality obligations stated in those agreements.

Exceptions to Trade Secret Infringement

The following acts are not treated as trade secret infringement under the Act:

Good Faith Acquisition Through Legal Transaction

Disclosure or use of a trade secret obtained through a legal transaction may not constitute infringement if the person did not know, and had no reasonable cause to know, that the other party had obtained the trade secret by infringing another person’s rights.

Disclosure or Use by State Agencies

A state agency may disclose or use a trade secret in certain circumstances, including where necessary to protect public health or public safety, or where necessary for another public interest that is not commercial in purpose. However, the state agency must take steps to protect the trade secret from unfair commercial use.

Independent Discovery

Independent discovery is not trade secret infringement. This applies where a person discovers or develops the same information through that person’s own knowledge, skill, effort or independent work, without improperly taking another person’s protected information.

Reverse Engineering

Reverse engineering may be permitted where a person studies and analyzes a publicly known product to discover how that product was invented, made or developed. However, the product must have been obtained in good faith. In addition, the analysis should be assessed carefully where there is a clear contractual obligation with the trade secret owner or seller that restricts reverse engineering.

Please note that these exceptions provided in the Act does not create an absolute monopoly over information. It protects against unfair acquisition, disclosure or use, while allowing lawful independent discovery and other permitted conduct.

Court Protection for Trade Secrets

Where there is clear evidence that a person has infringed or is about to infringe trade secret rights, the trade secret controller may apply to the court for provisional measures before filing a lawsuit.

The court may order the relevant person to stop or refrain from trade secret infringement on a temporary basis where the legal requirements are satisfied. The trade secret controller may also bring a court action seeking an injunction to prevent further infringement and may claim damages from the infringer.

Court protection can be especially important where confidential information may be quickly copied, transferred, uploaded, disclosed, destroyed or used by competitors. In serious cases, urgent evidence review and early legal action may be critical.

Mediation and Settlement of Trade Secret Disputes

Before bringing a trade secret dispute to court, the parties may agree to request the Trade Secrets Board to mediate or settle the dispute. Mediation may be useful where the parties wish to preserve a commercial relationship, resolve misuse of confidential information, obtain undertakings, control future disclosure, or settle claims without lengthy litigation. However, where confidential information is at immediate risk, court protection or urgent legal measures may still be necessary.

Limitation Period for Trade Secret Infringement Claims

A lawsuit may not be filed after three years from the date the trade secret controller became aware of the infringement and the identity of the infringer. In any event, the claim must not be filed later than 10 years from the date of infringement.

This limitation period makes early investigation and legal assessment important. Businesses that suspect misuse of trade secrets should act promptly to preserve evidence, identify responsible persons and assess available legal remedies.

Criminal Offences, Penalties, and Liabilities

The Act imposes criminal penalties for certain conduct, including;

Obstruction of Competent Officials

A person who obstructs the performance of duties by a competent official may face imprisonment of up to one year, a fine of up to 20,000 baht, or both. A person who fails to provide reasonable assistance to a competent official may face imprisonment of up to one month, a fine of up to 2,000 baht, or both.

Disclosure of Another Person’s Trade Secret

A person who discloses another person’s trade secret to the public, by any means, with malicious intent to cause damage to that person’s business, may face imprisonment of up to one year, a fine of up to 200,000 baht, or both. This offence is compoundable.

Misuse by Persons Responsible for State-Held Trade Secrets

A person who has a duty to maintain trade secrets held by a state agency and who improperly discloses or uses such trade secrets for that person’s own benefit or another person’s benefit may face imprisonment of up to two years, a fine of up to 200,000 baht, or both.

Disclosure of Confidential Business Facts Learned Through Official Duties

A person who discloses facts relating to the business of a trade secret controller, where such facts are not normally disclosed and were learned through duties under the Trade Secrets Act, may face imprisonment of up to one year, a fine of up to 100,000 baht, or both.

This does not apply where disclosure is made in the course of official duties, investigation or court proceedings.

A person who later learns such facts from an official source in connection with official duties, investigation or court proceedings, and then discloses them, may also face the same penalty.

Corporate Liability

Where an offence is committed by a juristic person, and the offence results from the order, act, omission, or failure to perform a required duty by a managing director or person responsible for the operations of the juristic person, that person may also be liable for the offence.

Settlement of Certain Criminal Offences

Certain offences under the Act may be settled by the Trade Secrets Board or a person authorized by the Board.

If the offender agrees to settlement and pays the fine within the specified period, the case is deemed settled under criminal procedure law. If the offender does not agree or fails to pay the fine within the prescribed period, the case proceeds further.

Practical Considerations for Businesses

Businesses should treat trade secret protection as an integral part of their operational, contractual, and legal risk management strategy. This includes identifying and classifying confidential business information, limiting access to sensitive information, and implementing appropriate confidentiality measures through non-disclosure agreements, employment contracts, and internal policies. Businesses should also establish safeguards for contractors, suppliers, consultants, and other business partners, while adopting technical measures such as access controls, encryption, and monitoring systems to protect valuable information.

Effective trade secret protection also requires businesses to implement procedures for departing employees, monitor potential unauthorized disclosures, and preserve evidence where misuse is suspected. Because legal protection depends on maintaining the confidentiality of the information, businesses should ensure that practical security measures are supported by appropriate legal documentation. A proactive approach to trade secret management can significantly strengthen enforcement and reduce the risk of commercial loss.

Trade Secrets and Employee Misconduct

Trade secret disputes often arise where employees, former employees, directors, consultants or business partners access confidential information and later use it outside the authorized purpose.

Examples may include copying customer lists, downloading technical files, transferring internal documents before resignation, sharing pricing information with competitors, using supplier data for a competing business, or disclosing formulas, know-how or business methods.

For employers, prevention is usually more effective than post-dispute enforcement. Employment agreements, confidentiality policies, access controls, device management, data monitoring, and exit interviews can all support trade secret protection.

Trade Secrets and Business Transactions

Trade secrets are frequently involved in commercial transactions, including joint ventures, mergers and acquisitions, technology licensing, manufacturing contracts, distribution agreements, research cooperation and outsourcing.

Before sharing sensitive information, businesses should consider whether appropriate confidentiality agreements, disclosure protocols, data room controls, permitted-use restrictions, and return or destruction obligations are in place.

Where trade secrets are transferred, licensed or disclosed for commercial purposes, the documents should clearly define the scope of rights, confidentiality duties, duration, permitted use, remedies, and post-termination obligations.

How We Can Assist

At Skyinterlegal, we assist clients with trade secret matters in Thailand, including confidentiality strategy, non-disclosure agreements, internal policy review, evidence assessment, employee misconduct issues, business partner disputes, data misuse concerns, urgent legal strategy and trade secret enforcement support.

Our legal and investigation background allows us to assist clients with evidence gathering, internal fact review, access-pattern analysis, document control issues, witness coordination, misconduct indicators and litigation strategy.

For companies that rely on confidential business information, early legal and investigative assessment can help preserve evidence, reduce commercial damage and improve the effectiveness of enforcement action.

Contact Skyinterlegal today to discuss trade secret protection and enforcement strategy in Thailand.

Frequently Asked Questions

What is a trade secret under Thai law?

A trade secret is commercial information that is not generally known or readily accessible, has commercial value because it is secret, and is subject to appropriate measures to keep it confidential.

Does a trade secret need to be registered in Thailand?

No, trade secret protection in Thailand does not require registration. Protection depends on whether the information meets the legal requirements and whether the person controlling the information has taken appropriate confidentiality measures.

What types of information can be protected as trade secrets?

Trade secrets may include formulas, customer lists, supplier information, technical know-how, manufacturing methods, algorithms, business methods, commercial strategies, research data and other confidential business information.

What acts may constitute trade secret infringement?

Unauthorized disclosure, taking or use of a trade secret may constitute infringement if it is done without consent and contrary to honest commercial practices. Examples include theft, electronic copying, disclosure to competitors, breach of an NDA, or inducing another person to disclose confidential information.

Is reverse engineering always prohibited?

No, reverse engineering may not be trade secret infringement if the product was obtained in good faith and the analysis is legally permissible. However, the position may differ if there is a clear contractual restriction against reverse engineering.

Can a business seek urgent court protection for trade secret misuse?

Yes, where there is clear evidence that a person has infringed or is about to infringe trade secret rights, the trade secret controller may request provisional court measures before filing a lawsuit.

What is the limitation period for trade secret infringement claims in Thailand?

A trade secret infringement claim must generally be filed within three years from the date the trade secret controller became aware of the infringement and the identity of the infringer. In any event, the claim must not be filed later than 10 years from the date of infringement.

Why are confidentiality measures important?

Confidentiality measures are essential because information must be subject to appropriate measures to qualify as a protected trade secret. Businesses should use practical controls such as restricted access, NDAs, internal policies, secure storage, passwords, encryption and employee procedures.