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

Overview

Thailand’s largest and most highly regarded independent law firm.

Since 1890, Tilleke & Gibbins’ head office has been located in Bangkok, Thailand’s capital and a regional center of commerce. From our offices in Bangkok, we serve the drivers of the regional economy, from regional operating headquarters to manufacturing conglomerates to new entrants in the Southeast Asian market.

Our Bangkok office offers unparalleled legal representation in the areas of commercial transactions and M&A, corporate services, dispute resolution and litigation, and intellectual property. We are also recognized by independent third parties for excellence in the fields of tax, regulatory affairs, transportation and logistics, technology, and banking and finance.

As a proudly independent regional firm, Tilleke & Gibbins is unique for our dedication to Thailand and Southeast Asia. It’s not just a market, but our home as well. Besides housing one of the best legal libraries in Thailand, our Bangkok office is home to our Museum of Counterfeit Goods, which educates visitors on intellectual property protection and enforcement, and our Textile Collection, which showcases our support for the cultures of the region by bringing together, preserving, and displaying over 2,000 pieces from different regions and ethnic groups in Thailand and Southeast Asia.

Experience

  • Successfully represented multiple clients in historic damages award judgements in complex IP litigation cases, including securing three judgments which respectively represent the highest-ever damages awards in Thai legal history for patent, industrial design, and trademark infringement cases—in all three instances beating records that were also previously set by Tilleke & Gibbins.
  • Representing a number of international creditors, including aircraft lessors, global banks, and credit card companies, in the landmark restructuring of national flag carrier, Thai Airways.
  • Acted for a global chemical manufacturing giants on the Indochina elements of a vast global acquisition and USD 1.6 billion asset swap with another leader in the sector, including extensive multijurisdictional due diligence, advice on antitrust and competition law, and advising on a number of post-acquisition matters.
  • Represented a major Thai bank in a multimillion dollar arbitration over delays to the construction of a landmark skyscraper project in Thailand.
    Advising many of the world largest technology companies, insurers, banks and financial services operators, and professional services companies on their compliance with Thailand’s Personal Data Protection Act, including carrying out compliance gap analysis, formulating implementation plans, and implementing compliance procedures across their Thai and global operations.
  • Retained by Marsh & McLennan Group to assist with all legal matters in mainland Southeast Asia, including market entry, M&As, joint ventures, business collaborations, insurtech offerings, product launches, cross-border insurance, and corporate secretarial services, among others.
  • Represented a multinational supplier to the petroleum industry in the establishment of their Thailand operations. In establishing their base of operations in Southeast Asia, we developed a flexible approach to provide for continued growth of the business in the region, and to minimize tax exposure for the company.
  • Appointed to manage the full global IP portfolio for Sundaram Clayton, a leading supplier of aluminum and magnesium castings to the automotive industry. Notably, the portfolio includes over 2,000 trademarks and more than 400 patents in 98 countries worldwide.
  • Worked with Thai government authorities to assist in the recovery of over USD 100 million of assets dishonestly expatriated from the country in one of the highest-profile fraud cases in Thai legal history.
  • Defended a leading global logistics company in three separate criminal actions brought by the Thai Customs Department with potential fines in excess of USD 15,000,000. After a defense put forth at the prosecutorial review stage, the Public Prosecutor issued non-prosecution orders in favor of our client. These orders have since been confirmed and this case is final.
  • Helped a manufacturer establish a subsidiary for the purpose of relocating its production facility to Thailand in a Board of Investment promoted investment project with a value of more than THB 100,000,000. We reviewed the joint venture agreement and advised on corporate law, relevant regulations, and necessary permits, before conducted a thorough review of the deposit agreement, land purchase and sale agreement, and utilities service agreement, and representing the client in the completion of the project.
  • Represented a major U.S. telecommunications and software vendor in negotiations with five Thai mobile telecom operators to deploy mobile number portability (MNP) in Thailand. We successfully negotiated the deal to full deployment, which included a build operate and agreed optional transfer build out. We also handled the formation of the client’s Thai subsidiary and associated visa/work permits and required Thai bank guarantees. MNP is now up and available in Thailand, and we continue to advise the client on mobile virtual network operator regulations and the offering of SMS services.
  • Advised the Thai subsidiary of a major Japanese automaker on a number of claims related to allegedly defective airbags. The claimants argued that they were injured after airbags deployed with excessive force when they were involved in accidents while driving the automaker’s vehicles. The claimants claimed damages and demanded that our client initiated recalls of its vehicles in Thailand. Through our representation, all cases were successfully settled for a nominal amount.

PROFESSIONALS

RELATED INSIGHTS

September 30, 2026
On September 23, 2026, the Trade Competition Commission of Thailand (TCCT) launched a one-month public consultation period on a proposed notification that would overhaul how antitrust offenses under the Trade Competition Act B.E. 2560 (2017) are settled and penalized. The draft notification would replace the existing 2019 settlement framework with more detailed procedures, introduce offense-specific methods for fine calculation, and add tiered deterrence multipliers. Comments may be submitted until October 22, 2026. Restructured Settlement Procedures and Timelines The proposed notification formalizes the settlement process with clearer terminology and mandatory procedural steps. Once the TCCT determines that an accused party has committed an offense that does not warrant imprisonment, the commission would fix the settlement fine amount. The accused would have 15 days from receipt of the summons to appear before the TCCT, though this period may be extended if necessary. If the accused confesses, consents to settlement, and pays the fine within the prescribed period, the criminal case would be closed and the settlement recorded. Refusals would also be recorded for further arrangements, and failure to appear, pay, or consent would result in the TCCT forwarding the case file and its recommendation—along with the accused’s fingerprints—to the public prosecutor. Notably, the draft allows accused parties to request settlement even after the TCCT has recommended prosecution but before the public prosecutor files charges, subject to prosecutorial consent. The draft preserves TCCT discretion to decline settlement where the accused has committed more than three prior offenses or where the violation has substantially impaired free and fair competition, directing such cases directly to prosecution. Fine Calculation Frameworks The proposed notification establishes different fine calculation approaches depending on the type of Trade Competition Act violation. For the most serious offenses (such as abusing market dominance, making anticompetitive agreements, or forming hardcore cartels) the
September 30, 2026
Under Thailand’s Patent Act B.E. 2522 (1979), any person may raise the invalidity of a patent as a matter of defense. However, the right to initiate court proceedings to cancel a patent is reserved exclusively for an “interested person” or the public prosecutor. This distinction between merely challenging validity and initiating judicial revocation proceedings has given rise to a significant body of Supreme Court (Dika) jurisprudence interpreting who qualifies as an “interested person” under the Patent Act. Statutory Framework Section 54 of the Patent Act provides that any invention patent granted not in compliance with the patentability requirements will be invalid, and that a petition to cancel such a patent may be submitted to the court by any “interested person” or the public prosecutor. Section 64 mirrors this provision for design patents, and section 65 novies extends the same framework to petty patents. However, none of these provisions defines the term “interested person,” leaving its interpretation to the courts. Supreme Court Interpretation The Thai Supreme Court has developed a consistent body of case law establishing that an “interested person” must be someone directly affected by the existence of the patent—not simply any member of the public. In 1989, the court found (Dika No. 2670/2532) that a party whose intended use of the patented technology was still in a preparatory stage—before actual manufacturing had commenced—did not qualify as an interested person. However, in 2009 the Supreme Court further elaborated  (Dika No. 2906/2552) that an interested party is one whose rights to utilize the invention are restricted by virtue of the patent, such as a manufacturer or producer whose operations are directly impacted by the patentee’s exclusive rights. In the 2008 case of T.M. Grating Steel Co., Ltd. v. Billion Mass Industry Co., Ltd. (Dika No. 974/2551), where the plaintiff had
September 28, 2026
Thailand has expanded the mandatory use of the Electronic Government Procurement (e-GP) system to cover submissions of procurement appeals to all government agencies subject to the Public Procurement and Supplies Administrative Act B.E. 2560 (2017) (Government Procurement Act). The expansion, which was set out in an official circular dated September 16, 2026, from the Public Procurement and Supplies Administrative Ruling Committee, takes effect on October 1, 2026. Notable Changes Under the expanded framework, bidders challenging an e-bidding or selective-method procurement result must file their appeal exclusively through e-GP within seven working days of the result being announced by the Comptroller General’s Department. While the system accepts filings around the clock during that window, submissions on the final day must be fully completed by 16:30 according to the e-GP system clock—merely starting a draft or uploading materials before the cutoff does not count as a confirmed submission. Government agencies that disagree with an appeal, in whole or in part, will also report their findings and supporting documents to the Appeals Committee through e-GP using the prescribed Appeal Opinion Report, also within seven working days of receipt. Withdrawals of appeals must likewise follow prescribed e-GP steps that vary depending on whether the matter is still under agency review, has been forwarded to the Appeals Committee, or has already been resolved. Excluded Categories Certain categories of procurement are not subject to the new guidelines on filing appeals electronically. These include: Procurement of supplies for confidential government use. Procurement conducted by government agencies operating overseas where the bidder is a foreign legal entity with no legal representative in Thailand, or where the bidder is a non-Thai national. Consulting service procurement under chapter 7 of the Government Procurement Act Design or construction supervision procurement under chapter 8 of the Government Procurement These exclusions apply
September 28, 2026
On September 15, 2026, the Thai Food and Drug Administration (Thai FDA) opened a public consultation period on the principles of a proposed Ministry of Public Health (MOPH) notification establishing specific Good Manufacturing Practice (GMP) requirements for foods derived from cultured animal cells. The proposal would build on Thailand’s existing safety assessment framework by proposing GMP requirements specifically tailored to the production of cultivated meat. As cultivated meat advances toward commercial production, its unique manufacturing processes present food safety challenges involving aseptic conditions, starting cell quality, culture media, and specialized equipment. Thailand’s Food Act B.E. 2522 (1979) provides the legal basis for regulating food manufacturing, but no GMP requirements specifically tailored to cultivated meat have been issued under it. The proposed framework aims to address this gap. The Thai FDA has not yet released a complete draft notification, so the proposed requirements outlined below may change before adoption. However, they indicate the direction the regulator intends to take, and companies preparing to enter the Thai market can use them now to anticipate their compliance obligations. What Is Cultivated Meat? Cultivated meat, also known as cell-based food or cell-cultured meat (and referred to in the proposed notification as food derived from cultured animal cells), is produced by cultivating animal cells rather than raising and slaughtering animals through conventional meat production. The process generally begins with the selection of animal cells or stem cells, which are cultivated in an appropriate culture medium within a bioreactor to promote cell growth and proliferation. Scaffolding materials or other techniques may subsequently be used to develop cells into tissue or other forms suitable for consumption. Unlike conventional meat production, this process introduces specific food safety considerations relating to starting cells, culture media, production substances, contamination controls, and potential residues in the final product. Thailand’s Safety
AWARDS & RANKINGS
September 30, 2026
Tilleke & Gibbins has been named a finalist in two categories at the IFLR and International Tax Review (ITR) Asia-Pacific Awards 2026. The firm is shortlisted for Thailand National Firm of the Year at the IFLR Asia-Pacific Awards, which recognize innovative cross-border transactions and the firms, teams, and transactions shaping the region’s legal and financial landscape. Tilleke & Gibbins is also shortlisted for Thailand Tax Firm of the Year at the ITR Asia-Pacific Tax Awards. The awards recognize leading firms and practitioners across the region for their work in direct tax, indirect tax, tax disputes, and transfer pricing. The winners will be announced at a joint awards ceremony on November 12, 2026, at the Ritz-Carlton in Hong Kong. For more information, please see the full shortlists for the IFLR Asia-Pacific Awards 2026 and the ITR Asia-Pacific Awards 2026.
September 24, 2026
Tilleke & Gibbins has earned firm and individual recognition across Southeast Asia in the inaugural edition of the Copyright 1000, a new guide to the world’s leading copyright professionals published jointly by Intellectual Asset Management (IAM) and World Trademark Review (WTR). The firm’s offices in Indonesia, Thailand, and Vietnam were each recognized in the rankings. These results highlight the strength of Tilleke & Gibbins’ regional copyright practice and its capabilities in helping clients protect, commercialize, and enforce their copyright assets across Southeast Asia. Six Tilleke & Gibbins practitioners also received individual recommendations: Indonesia Wongrat Ratanaprayul Thailand Alan Adcock Somboon Earterasarun Suebsiri Taweepon Vietnam Linh Duy Mai Loc Xuan Le Dedicated exclusively to copyright law and practice, the Copyright 1000 rankings identify leading firms and practitioners across key jurisdictions worldwide. The rankings are based on qualitative research assessing factors such as depth of expertise, market standing, and the sophistication of firms’ and practitioners’ work. For more information, please see the full Copyright 1000 rankings.
September 23, 2026
Tilleke & Gibbins has received eight nominations for the Managing IP Asia-Pacific Awards 2026, recognizing the strength of the firm’s intellectual property practice across Southeast Asia. The firm has been shortlisted in the following categories: Asia-Pacific Firm of the Year (Domestic) Cambodia Firm of the Year Indonesia Firm of the Year Thailand Patent Firm of the Year Thailand Trademark Firm of the Year Vietnam Patent Firm of the Year Vietnam Trademark Firm of the Year In addition, Darani Vachanavuttivong, managing partner and managing director of the firm’s intellectual property practice, has been shortlisted for Asia-Pacific Practitioner of the Year (General Law Firms). The eight nominations reflect the continued recognition of Tilleke & Gibbins’ regional capabilities in intellectual property protection, commercialization, and enforcement. The winners will be announced at a ceremony in Kuala Lumpur on November 5, 2026. For more information, please see the full Managing IP Asia-Pacific Awards 2026 shortlist.
September 23, 2026
Tilleke & Gibbins has received 14 nominations for the Asialaw Awards 2026. The nominations span jurisdiction-level, practice-area, and individual categories across the region. At the jurisdiction level, Tilleke & Gibbins has been shortlisted in three categories: Cambodia Firm of the Year Laos Firm of the Year Thailand Firm of the Year The firm has also been shortlisted for four regional practice awards: Aviation and Shipping Firm of the Year Corporate and M&A Firm of the Year Dispute Resolution Firm of the Year Technology and Telecommunications Firm of the Year Seven individual nominations recognize lawyers from the firm’s offices in Laos, Thailand, and Vietnam: Prisna Sungwanna, Laos Female Lawyer of the Year Pimvimol Vipamaneerut, Thailand Female Lawyer of the Year Tram Ngoc Bich Nguyen, Vietnam Female Lawyer of the Year John Frangos, Aviation and Shipping Lawyer of the Year, Dispute Resolution Lawyer of the Year Pongpalin Chantrapirom, Dispute Resolution Rising Star of the Year Chusert Supasitthumrong, Labour and Employment Lawyer of the Year The winners will be announced at an awards ceremony in Kuala Lumpur on November 5, 2026. For more information on the Asialaw Awards 2025 and to browse a full list of the nominees, please visit the Asialaw website.

Bangkok Office

Bangkok Office

Supalai Grand Tower, 26th Floor, 1011 Rama 3 Road, Chongnonsi, Yannawa, Bangkok 10120