The aim of this paper is to find and to analyse the references to and the presence of Petrarch’s works in Francesco Filelfo’s collected letters. First, I traced the references to Petrarch’s works (Filelfo wrote a commentary on Petrarch’s Rerum Vulgarium Fragmenta, and a commentary on Triumphs was attributed to him). Above all, Petrarch’s Familiares and Seniles became a model for humanistic collections of epistles: just like Petrarch, Filelfo selected and edited his letters, with the purpose of offering his readers a clear and accurate picture of himself. Moreover, as Petrarch does, Filelfo says that he started to collect his letters following a traumatic event. Finally, I make a comparison between Petrarch’s consolatory letters and Filelfo’s ones.