This article systematises procedures for dismissing a Head of State in the countries of South America. We look at the genesis of introducing impeachment to the constitutions of countries in this part of the world, paying close attention to the specific historical background of the Western Hemisphere, then focusing on the categorization and systematisation of the procedure itself. We present three models of the presidential impeachment in South America: Judicial, Bicameral and Unicameral. Using a contextual approach, doctrinal research, comparative method and theory-building strategy, we discuss the general features of these models and the specificities of use in each country of the continent.