The article examines the legal problems of greenwashing, which is the deliberate deception of consumers about the environmental characteristics of tourist services. The main features and forms of greenwashing are analyzed, as well as its negative consequences for consumers, conscientious participants in the tourism services market and the implementation of the principles of sustainable development in general. Gaps and inconsistencies in the current legal regulation have been identified. Based on a comparative legal analysis, the expediency of consolidating the presumption of unreliability of environmental statements in Russian legislation, as well as the introduction of legal definitions of the concepts of "environmental statement" and "ecological tourism" is substantiated. The elimination of the identified defects in legal regulation will contribute to the implementation of the principles of sustainable development and the establishment of effective legal mechanisms to prevent greenwashing in the tourism industry.