The legislator provided for criminal liability for deliberately false denunciation to protect the interests of the justice authorities from imaginary criminal prosecution. Often, convicts, their acquaintances, relatives, and other persons, out of a sense of revenge for the official activities of an employee of the penal enforcement system, or other base motives, try to use the mechanism of initiating a criminal case to achieve their goals. Moreover, due to the leniency of the punishment, the convicts are not afraid of being brought to criminal responsibility for deliberately false denunciation. Nevertheless, the public danger of this act is not only that it encroaches on the normal activities of the judicial authorities, preventing the establishment of the truth in the case, the protection and restoration of the violated rights of the injured party, but also that a deliberately false denunciation under certain circumstances may entail extremely negative consequences in the form of a conviction of an employee or his dismissal from the service. The article explains the algorithm of actions when an investigation body receives a deliberately false denunciation of a crime committed by them. When preparing the article, we took into account the norms of the current criminal and criminal procedure legislation, as well as the established practice of investigating this category of criminal cases