The editors of the journal “Fides, Ratio et Patria. Studia Toruńskie” use the plagiarism detection program https://www.crossref.org/services/similarity-check/ using iThenticate software (http://www.ithenticate.com/), which is owned by Turnitin. The program allows for examining the similarity of the submitted text to articles deposited by publishers using Similarity Check, as well as internet sources, within the “Fides, Ratio et Patria. Studia Toruńskie” editorial.