EN
The article describes the phenomenon of denunciations [udavačství] in occupied Brno in the years 1940–1941 on the basis of source documents from the local police department, which are stored in the Moravian Land Archive. Statistical analysis of these materials demonstrates that this phenomenon was relatively more frequent among Germans than Czechs, which was undoubtedly related to the different attitudes of the two ethnic groups to the authority and regulations of the Nazi Reich. The social origin of those who wrote denunciations demonstrates that such acts were more frequently committed by those among the common people than by representatives of (broadly-conceived) social elites, and this tendency was especially marked among Czechs.