Since 2009, the Collective Apostasy Campaign in Argentina has mobilized some people who are opposed to the political interference of the Catholic Church through the formal act of apostatizing. The politicization of sexual and reproductive rights, and, especially, the fight for the legalization of abortion, led to the campaign that acquired great public repercussions between 2018 and 2020. This paper analyzes 13 self-narratives of apostasy publicly available since 2009, digging into its plot, motives to apostatize, and motivation for its publicizing. Through a thematic analysis, the diverse self-narratives show similar motivations (to promote social debate on political secularization in the country), although they differ in the centrality of their personal, sociopolitical, and procedural motives to apostatize. The stories that apostates tell are resources for social mobilization as they seek an increasingly broad audience and serve the pedagogical function of sharing arguments against the political role of the Catholic Church and in favor of personal ideological coherence.