Overt Acts (18 U.S.C. 371) are criminal acts committed by two or more persons in furtherance of an illegal agreement to commit an offense against the United States. Under 18 U.S.C. 371, an overt act must be committed by one of the conspirators in order for the conspiracy to be considered complete. Overt acts can include any affirmative step taken by one of the conspirators to further the illegal agreement, such as planning a meeting, purchasing supplies, or communicating with other conspirators. There are two types of overt acts 18 U.S.C. 371: completed overt acts and attempted overt acts. Completed overt acts are those which have been fully executed, while attempted overt acts are those which have been attempted but ultimately failed.