This article examines several cases of problematic documents, arising from their improper, singular or anomalous placement, which have surfaced during the recent activities related to the reorganization and the study of the archives of Adolfo Mussafia and Ernesto Giacomo Parodi at the Biblioteca Umanistica of the University of Florence. Firstly, it clarifies why three letters from Gustav Gröber and one from Emil Levy in the Parodi Archive should instead be attributed to the Mussafia Fonds. The article then discusses the current extent of Gröber’s correspondence with Mussafia and suggests a date for the only letter lacking one, providing a full transcription of it. Subsequently, attention turns to the postcards sent by Kristoffer Nyrop to Ernesto Giacomo Parodi, with corrections made to their order, and to the inappropriate placement of a letter from Joseph Bédier found in his correspondence with Parodi. This letter, originally sent to someone else (presumably Francesco Novati), to serve as a mediator following an alleged discourtesy from the French philologist towards Parodi, was subsequently forwarded to Parodi.