You are using an outdated browser and your browsing experience will not be optimal. Please update to the latest version of Microsoft Edge, Google Chrome or Mozilla Firefox. Install Microsoft Edge

December 16, 2011

How to Prove Damages in Trade Secret Infringement Disputes

Bangkok Post, Corporate Counsellor Column

Calculating damages is difficult in any type of litigation, but attempting to assess the damages in cases involving trade secrets can be far more complex than in cases relating to other forms of intellectual property rights.

For plaintiffs, recovery of damages is a key factor in trade secrets litigation. Like other forms of intellectual property litigation, the plaintiff’s lost profits form a central component of any damages award. But unlike trademark or patent litigation, Thailand’s Trade Secrets Act empowers the court to move beyond lost profits and award other types of damages as well.

Causes of Action

Protection for trade secrets is usually provided in the form of non-disclosure of trade information, which must be kept confidential by the owner through the use of appropriate means. Trade secrets are only valuable as long as they remain a secret.

Any act of disclosure, deprivation, or usage of a trade secret without the consent of the owner in a manner contrary to fair commercial practice constitutes an infringement of trade secret rights, provided that the infringer knows or should have known that his or her action is contrary to fair commercial practice.

The causes of action which are available in trade secret cases include: (1) breach of an employment agreement by an employee; (2) misappropriation of trade secrets and confidential information; and (3) tortious interference with business relations with the ex-employee and/or between the former employer and its customers or suppliers.

Calculating Lost Profits

Where a cause of action exists, the plaintiff will likely seek damages that are sufficient to compensate for the economic and financial loss caused by the defendant’s infringement.

In trade secrets litigation cases where both the plaintiff and the defendant have already developed and sold the products, a historical baseline for profitability can be been established. If such actual damages can be proved, then the lost profits may be recoverable.

Lost profits are typically calculated as net profits (i.e. gross revenue minus overheads and expenses). Most courts prefer to use the plaintiff’s lost profits, or the defendant’s profit gains, as the preferred measure for assessing damages.

However, if neither the plaintiff nor the defendant has any sales history on which to base such a calculation, most courts would find the measure of lost profits to be too speculative for the purpose of recovering damages.

The court calculates the lost profits which are attributable to the plaintiff through a range of methods, which vary from relatively straightforward to extremely complex. The court will consider the following factors:

  • The nature of the misappropriated trade secret
  • Research and development costs
  • Competition between the businesses of the plaintiff and the defendant
  • The size of the markets and other factors which are difficult to quantify

Therefore, during the trial, the plaintiff should show the court that the plaintiff has invested significantly, over the course of many years, in technology, time, money, intellectual property, security measures, and so forth, in relation to the trade secrets. The plaintiff may present evidence to prove these factors to the court, so that the court can use the information to determine the amount of damages to award.

The Thai Trade Secrets Act does not specify the amount of expenses that can be claimed in relation to the enforcement of rights, in the same manner as the Thai Patent Act. A plaintiff can claim its lawyers’ fees and travel expenses in the lost-profit calculations, but it is important to bear in mind that there is no precedent judgment in relation to such claims.

Additional Damages

Beyond just recovery of lost profits, the Thai Trade Secrets Act empowers the court to apply several additional measures for calculating damages:

  1. In addition to the damages for the actual damage suffered, the court may include in the damages for the plaintiff profits accrued from, or connected with, the infringement by the infringer.
  2. If the court is unable to measure the damages under (1), it may order that an amount of damages be paid to the controller of the trade secrets.
  3. Where there is clear evidence that the infringement of trade secrets has been conducted wilfully or maliciously, the court is empowered to order the infringer to pay punitive damages, in addition to the amount of damages granted under (1) or (2). However, the punitive damages are limited to no more than double the damages payable under (1) or (2).

These additional forms of damages provide new avenues for trade secret owners to seek redress when their valuable information has been misappropriated. Thai legal practitioners will be closely monitoring the practical application of these damages awards as more trade secrets disputes are heard by Thailand’s Intellectual Property and International Trade Court.

RELATED INSIGHTS​ 

September 25, 2025
In the Thailand contribution to Labor and Employment Disputes 2026, four members of Tilleke & Gibbins’ Bangkok labor and employment team outline key aspects of dispute resolution in Thailand. Their analysis, part of Lexology Panoramic’s comparative guide covering jurisdictions worldwide, addresses the following areas: Pre-action considerations: key requirements, third-party funding, contingency fee arrangements Issuing a claim: forum, territorial jurisdiction, standing, commencing claims, fees, service, defendants and legal personality, types of claims, time limits, counterclaims Case management: procedure, rules, amendments to claims, adding parties, consolidating proceedings, class and collective actions, evidence, witnesses, tactical considerations Interim relief: availability, requirements Trial: hearings conduct and time frames, confidentiality and public access, media reporting, elements of successful claims and burden of proof Alternative dispute resolution: available types, requirements and expectations, enforcement Collective employment and labor rights: enforcement and standing Remedies and enforcement: available remedies, assessing compensation, enforcement mechanisms Appeals: procedure, time frames, other means of challenge Updates and trends: recent cases and developments, technology developments, other issues The complete Thailand chapter can be downloaded below. Tilleke & Gibbins also contributed the Cambodia and Vietnam chapters to Labor and Employment Disputes 2026. Readers can also gain 30 days of complementary access to the full Labor and Employment Disputes 2026 guide and the rest of Lexology Panoramic’s varied offerings through this link.
September 25, 2025
Four of Tilleke & Gibbins’ labor and employment specialists in Phnom Penh have authored the Cambodia chapter of Labor and Employment Disputes 2026, the latest edition of Lexology Panoramic’s global guide to handling labor and employment disputes. The chapter provides practical insights on a wide range of dispute resolution issues, including: Pre-action considerations: key requirements, third-party funding, contingency fee arrangements Issuing a claim: forum, territorial jurisdiction, standing, commencing claims, fees, service, defendants and legal personality, types of claims, time limits, counterclaims Case management: procedure, rules, amendments to claims, adding parties, consolidating proceedings, class and collective actions, evidence, witnesses, tactical considerations Interim relief: availability, requirements Trial: hearings conduct and time frames, confidentiality and public access, media reporting, elements of successful claims and burden of proof Alternative dispute resolution: available types, requirements and expectations, enforcement Collective employment and labor rights: enforcement and standing Remedies and enforcement: available remedies, assessing compensation, enforcement mechanisms Appeals: procedure, time frames, other means of challenge Updates and trends: recent cases and developments, technology developments, other issues The full Cambodia chapter is available for download below. Tilleke & Gibbins also contributed the Thailand and Vietnam chapters to Labor and Employment Disputes 2026. Readers can also gain 30 days of complementary access to the full Labor and Employment Disputes 2026 guide and the rest of Lexology Panoramic’s varied offerings through this link.
September 24, 2025
Online shopping in Thailand is more accessible than ever, with global platforms, local social media shops, and entertainment-driven social commerce enabling instant purchases. However, this convenience comes with rising concerns over digital intellectual property (IP) infringement, including counterfeit goods, pirated content, and unauthorized brand usage. At first glance, online platforms appear to offer quick solutions. Most major e-commerce sites, social media channels, and social commerce platforms provide “notice and takedown” systems, where IP owners can file complaints and request the removal of listings that infringe IP rights, such as trademarks and copyrights. These tools are certainly useful, as seeing a fake product vanish from a platform feels like progress. But the reality is less reassuring. The counterfeit goods themselves remain in warehouses, markets, or shops, ready to be resold. Sellers whose accounts are taken down often return within days under new names or accounts. In other words, a takedown is like cutting weeds without pulling out the roots: they always grow back. While notice and takedown tools are widely available and can be managed internally by most IP owners, their impact is often short-lived. IP owners seeking more effective, lasting protection need to take a more strategic and multilayered approach. The same applies to online piracy. Unauthorized streaming websites that offer free access to movies, TV shows, or sports broadcasts have become widespread in Thailand. To combat this, rightsholders can request website blocking under the Computer Crime Act, through the Ministry of Digital Economy and Society and the courts. Once requests are approved, internet service providers are ordered to block access to infringing sites. Blocking orders can be effective in disrupting large-scale piracy operations, but they also face limitations—pirate sites frequently reappear under new domains. Strategic Protection Whether the infringing material is physical counterfeit goods or intangible streaming content,
September 10, 2025
Under Thai law, authorized directors stand as a company’s mind and will and, as such, may incur personal criminal liability for acts or omissions committed in the course of company business. When allegations surface, directors must be prepared for the practical reality that, before guilt or innocence is ever adjudicated, they could be deprived of liberty unless bail release is promptly achieved through the competent legal authority. When Bail Can Be Granted Two procedural moments trigger the need to consider bail. The first arises during the investigative phase, when a claim is lodged against a director with the competent law enforcement authorities. Upon receipt of a complaint, the assigned inquiry officer summons the director for questioning, compiles evidence, and ultimately forwards a prosecution or nonprosecution recommendation to the public prosecutor. Although the public prosecutor retains ultimate discretion to indict an accused director, the police or prosecutor may conclude that pretrial detention is necessary and may therefore apply to the court for an order to hold the director in court custody. The second moment occurs after a criminal case is filed directly with the court. This occurs once a court accepts a criminal case filed by a prosecutor against a director or, alternatively, when the court accepts a case filed by an individual for trial. For cases filed by individuals, the plaintiff presents prima facie evidence at the preliminary hearing, and the court will accept the complaint if it finds sufficient grounds, thereby conferring upon the director the status of a criminal defendant. Upon acceptance of the criminal case, the court then has the inherent authority to order custody pending trial unless the defendant secures bail release. Procedural Considerations Experienced litigants typically prepare bail security in advance and submit a bail petition at the earliest possible time. While there are