Thailand is one of the few countries where registration (or recordation, to be precise) of a well-known trademark is available at the Department of Intellectual Property under its Regulation Regarding Well-Known Marks B.E. 2548 (2005). Applications for well-known marks will be thoroughly examined by the Board of Well-Known Marks, chaired by the Director of the Trademark Office and composed of Thai Trademark Registrars from all classes of goods and services. When assessing well-known mark applications, the Board of Well-Known Marks requires that marks comply with certain criteria, as discussed in detail in this article.