This study is the first part of a planned series of articles on the issue of disputations about Wyclif in connection with his 45 articles. It analyses the anonymous undated refutation of Oxford University’s testimonial on the blameless life and work of John Wyclif, and makes it accessible in a critical edition in the form of an appendix. By taking into consideration manuscript preservation, argumentation, and literary arrangement as well as chronology, the author proves for the first time the immediate relation of the refutation to the Carthusian cloister of Údolí Josafat (Valley of Josephat) in Dolany near Olomouc and its prior Štěpán of Dolany. A component of the study is an excursion into the issue of Archbishop Zbyněk’s synodal directive to surrender books by Wyclif. and Dušan Coufal.