The copyright law currently in effect in Thailand is the Copyright Act B.E. 2537 (1994), which came into force in March 1995. After 20 years, a new amendment came into effect in August 2015, with a focus on updating the law for the digital age, followed by a further amendment that became effective in March 2019 to comply with the Marrakesh Treaty providing exemptions to copyright infringement for people with disabilities. Recently, to comply with the World Intellectual Property Organization Copyright Treaty (WCT) and update practices in combating online infringement, the Thai Copyright Act has been amended once again. This article will explore the backstory behind this amendment, highlight the law’s successes and potential areas of concern, and explain what copyright owners, practitioners, and—most importantly—internet service providers (ISPs) should be aware of in order to comply with this law, which was published in the Government Gazette on February 24, 2022, and will become effective on August 23, 2022. The Backstory Despite the modernizing focus of the 2015 amendment, in recent years Thailand recognized the necessity of strengthening copyright protection and modernizing the law further to cope with online infringement problems fueled by today’s rapid technological change. Previously, the Copyright Act B.E. 2537 (1994), as amended in 2015, provided a specific mechanism to solve online copyright infringement. This mechanism, which appeared in Section 32/3 of the law, differed from the clearly defined notice-and-takedown system favored in several other countries by relying on the courts to resolve copyright infringement matters in relation to the provision on ISP liability and safe harbors. As the law did not include adequate notification procedures or rapid dispute resolution mechanisms, the implementation of Section 32/3 became impractical. In addition, the definition of an ISP was broad, so “mere conduit” (or intermediary) ISPs would often receive court