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

March 15, 2016

Recognition of Well-Known Marks in Thailand

Managing Intellectual Property

After Thailand’s Department of Intellectual Property (DIP) recently announced that it would abolish the recordation system for well-known trademarks, many questions about the status of well-known marks remained unanswered. This article will discuss whether well-known marks are still protected in Thailand, who has authority to determine whether a mark is well known, and whether a similar recordation system will be reestablished in the future.

Abolishment of Well-Known Marks Recordation System

The Notification of Cancellation of Rules of the Department of Intellectual Property Regarding Recordation of Well-Known Marks B.E. 2548 (2005), issued on September 9, 2015, stated that the DIP’s recordation system for well-known trademarks was abolished because the Board of Trademarks already has criteria to determine whether a mark is well known. For the sake of harmonization, the DIP cancelled its recordation system.

Protection of Well-Known Marks

As Thailand is a member of the Paris Convention and the TRIPS Agreement, protection of well-known marks still exists in Thailand despite the recordation system being abolished. Under Section 8(10) of the Trademark Act, a mark which is identical or very similar to a well-known mark to the extent that it may cause confusion among the public as to the owner or origin of the goods is not registrable.

According to the Ministerial Notification regarding Rules on Determination of Well-Known Marks, dated September 21, 2004 (Ministerial Notification)—which is applicable to all government organizations, from the DIP to the Supreme Court—the following criteria should be used to determine whether a mark is well known:

  • The mark has been used on goods or services by way of distribution, or has been used, advertised, or used by other means in the usual manner and in good faith;
  • The mark has been widely used, whether in Thailand or abroad, in the usual manner and in good faith to the extent that it is well known among the general public or those in the relevant industry in Thailand;
  • The mark has been used to the extent that its reputation for quality is generally accepted among consumers; and
  • Such use is done whether by the applicant or the applicant’s authorized representative or licensee, and whether locally or abroad.

Current System

In the absence of the previously existing recordation system, the following authorities can now determine whether a mark is well known:

Trademark Registrars.  At the examination stage, trademark registrars have a duty to reject the registration of a mark which is identical or similar to a well-known mark and may cause confusion among the general public as to the owner or origin of the goods.

Board of Trademarks.  The Board of Trademarks, which acts as an appeal authority for decisions of the registrars, still has the authority to decide whether a mark is well known. If a case is appealed to the Board of Trademarks, the applicant or opposer may argue that its mark is well known. The Board of Trademarks will then make a decision on the well-known status of the mark in accordance with the Ministerial Notification, taking into account factors such as acknowledgement of the public in Thailand; the amount of sales or revenue generated by the mark; the market share of the applicant’s business; and so on.

The applicant or opposer should submit evidence in support of these factors, such as magazines, product samples, invoices, bills of lading, advertisements, trademark registration certificates, awards, judgments with favorable decisions, etc. In Thailand’s civil law system, however, court judgments are merely persuasive and do not hold binding precedence.

Courts.  The Intellectual Property and International Trade Court (IP&IT Court) and the Supreme Court can also make decisions on the well-known status of marks based on the Ministerial Notification. According to Supreme Court Decision No. 6113/2555, recordation is not mandatory. The fact that the opposer did not file a recordation was not a significant reason to decide that the mark was not well-known. It was determined that all facts must be considered in accordance with the Ministerial Notification, such as evidence proving the well-known status of the mark.

There is currently no indication that a recordation system for well-known marks will be re-established in the future. A single committee which is authorized to make a binding decision on whether a mark is well known would be welcomed, because multiple authorities issuing nonbinding decisions can be burdensome to trademark owners, who need to prove their mark’s well-known status at every different stage and in every similar case. In the future, if a system to record well-known marks is established which binds all relevant government authorities, owners of well-known trademarks will benefit tremendously because it will reduce costs and time to prove that a mark is well known.

RELATED INSIGHTS​ 

February 26, 2026
Thailand is preparing to offer new tools for intellectual property enforcement as the Electronic Transactions Development Agency (ETDA) recently released for public consultation a draft notification requiring social media platforms to verify user identities and conduct know-your-customer (KYC) checks on advertisers. The draft Notification of the Electronic Transactions Commission on Measures to Prevent Technological Crimes for Social Media Service Providers, which is to be issued under the Emergency Decree on Measures for the Prevention and Suppression of Technological Crimes B.E. 2566 (2023), as amended in 2025, primarily aims to combat online fraud and technology-related crimes. However, its new obligations also provide IP owners with valuable tools to identify anonymous infringers. Key Regulatory Mandates The draft notification imposes several verification requirements on social media platforms operating in Thailand. These requirements also strengthen IP rights holders’ ability to identify anonymous infringers, as platforms must: Verify user identities through registered phone numbers and link all accounts to verifiable identities. Conduct KYC checks on advertisers, including individuals, companies, and any third-party payers. Perform heightened identity checks for high-risk or repeat offenders before publishing advertisements. Promptly remove content flagged by the Anti-Technology Crime Division and prescreen advertisements for prohibited or high-risk content. How IP Owners Can Use This Notification for Enforcement The phone number–based verification requirement enables IP owners to work more effectively with enforcement authorities in tracing individuals or entities responsible for infringing content. The comprehensive advertiser KYC obligations, including mandatory disclosure of third-party payment sources, create a clear audit trail even when bad actors attempt to obscure their identity through intermediaries or shell accounts. This traceability is essential for pursuing damages and dismantling organized counterfeit operations. The ETDA is now considering adjustments to the draft notification after receiving comments during the public consultation period, which ended on February 2, 2026. Following finalization
February 25, 2026
Tilleke & Gibbins has updated the Vietnam chapter in the newly released Licensing 2026 guide, published by Lexology Panoramic. The comparative guide provides companies and other interested readers with information on licensing law and practice in various countries around the world. Licensing 2026 provides detailed information on the following topics: Restrictions, laws and licensing arrangements Intellectual property issues: Paris Convention for the Protection of Industrial Property, contesting the validity of licensor’s IP rights, invalidity and expiry of IP rights, security interests, proceedings against third parties, sublicensing, jointly owned IP, first to file, scope of patent protection, trade secrets, copyright Software licensing: Perpetual licensing, legal requirements, user restrictions Royalties and payments, currency conversion, and taxes: Relevant legislation, restrictions, taxation of foreign licensors Competition law issues: Restrictions on trade, legal restrictions, and IP-related court rulings Indemnification, disclaimers, and damages: Prevalence and enforceability of indemnity provisions and contractual waivers of damages Termination: Right to terminate, impact of termination Bankruptcy: Impact of licensee or licensor bankruptcy Dispute resolution: Governing law, arbitration, enforceability, injunctive relief, contractual waivers The Vietnam chapter is available below as a PDF. Readers can gain 30 days of complementary access to the full Licensing 2026 guide and the rest of Lexology Panoramic’s varied offerings through this link.
January 30, 2026
On December 26, 2025, the government of Vietnam promulgated Decree No. 341/2025/ND-CP on administrative sanctions for violations of copyright and related rights (Decree 341), with an effective date of February 15, 2026. The new decree replaces Decree No. 131/2013/ND-CP, as amended, and represents the first comprehensive revision of the administrative enforcement framework in this area in eight years. Legislative Context and Objectives Decree 341 reflects Vietnam’s evolving copyright and related-rights framework, particularly in light of the country’s commitments under bilateral, regional, and multilateral treaties governing the digital environment. While the decree retains a number of provisions from the previous regime, it also introduces significant amendments to infringing acts, penalty thresholds, remedial measures, and enforcement procedures. The primary objectives of the new decree are to (i) enhance the deterrent effect of administrative sanctions; (ii) harmonize sanctions with the 2025 amendments to the Law on Intellectual Property and criminal law principles; and (iii) address enforcement challenges arising from online and cross-border exploitation of copyrighted works. Expanded Scope of Sanctionable Subjects Under Decree 341, administrative sanctions apply not only to Vietnamese entities committing infringing acts within Vietnam, but also to Vietnamese and foreign entities that commit acts of infringement on the internet where the protected content is accessed, consumed, or exploited by users in Vietnam. This expansion reflects the realities of cross-border digital exploitation. However, the decree does not yet provide precise definitions of key terms such as “users” or “consumers” of digital content in Vietnam, which may require further regulatory clarification. Monetary Penalties and Penalty Structure The statutory maximum fines remain unchanged, at VND 250 million for individuals and VND 500 million for organizations, but the penalty framework is substantially restructured. Fines are now calibrated based on three core criteria: (i) the amount of illegal profit obtained; (ii) the level of
January 30, 2026
Vietnam’s Intellectual Property (IP) Law, despite being amended in 2022, underwent another significant revision at the end of 2025. The latest amendment aimed to address five major policy objectives set by the Vietnamese government, including promoting innovation, digital transformation, and international integration. Among the most notable changes in the 2025 IP Law, which takes effect on 1 April 2026, is the expansion of industrial design protection under Article 4.13. The revised definition now includes partial designs and intangible designs, marking a transformative shift in Vietnam’s industrial design regime. This change has particularly significant implications on designs classified under Class 32 of the Locarno Classification—which covers graphic designs, logos, ornamentation, surface patterns, arrangements, and other intangible products. These designs, previously excluded from protection in Vietnam, are now recognized under the new legal framework. Background: Status of Class 32 Designs Before 2026 Th Intellectual Property Office of Vietnam currently applies the 13th edition of the Locarno Classification for industrial design filings. However, not all classes in this system have historically been eligible for protection. Under the 2022 IP Law, Class 32 designs were explicitly excluded based on the following legal grounds: Definition under Article 4.13 (2022 IP Law): “An industrial design is the external appearance of a product or a component for assembly into a complex product, expressed in shapes, lines, colors, or a combination thereof, and visible during the exploitation of the product’s utility or the complex product.” Product requirements under Article 21.2 of Circular 23/2023/TT-BKHCN: A product is defined as an object, a tool, a device, or means, manufactured by industrial or handicraft methods, with clear structure and function. A component for assembly into a complex product must be capable of independent circulation and detachable from the complex product. Based on these definitions, Class 32 designs, such as graphical