When a company promotes its products or services, it will naturally use laudatory terms or phrases to describe their quality. However, in Vietnam, such use could constitute trademark infringement, as many terms with a descriptive or laudatory nature have been granted registration as trademarks, often without disclaimers. Examples include “Nuoc Mam Me Lam” (“Fish sauce made by mom”) under Reg. No. 392575 for fish sauce, “Drink it, Wear it” under Reg. No. 387444 for clothing retail services, and “Making Cancer History” under Reg. No. 388177 for healthcare services. Imagine a case where a hospital advertises that its cancer treatment services can help “make cancer history.” Would such advertisement be considered trademark infringement of the registered mark “Making Cancer History”? Fair use or infringement? Under the doctrine of descriptive fair use commonly adopted worldwide, a third party, even a direct competitor, may use another party’s descriptive trademark to describe its own products or services, even if such mark has acquired secondary meaning. However, that use can only be in a purely descriptive manner. Descriptive fair use requires that the mark being used actually describes a quality or attribute of the goods or services, rather than indicating the source. The descriptive words must also be used in the normal course of language. In addition, the mark must be used in the text portions of an advertisement and not as a banner or in any other manner that sets it apart from the other words in the sentence or paragraph in which it is used. To be nominative fair use, such use should accurately refer to a trademark owner or to goods or services and cannot be misleading or defamatory, or imply endorsement or sponsorship by a trademark owner. Vietnam does not have any detailed regulation on fair use of descriptive marks.