The earliest records of diocesan administrator ‘sede vacante’ from the Gniezno archdiocese come from Kraków. They were started a few days after the death of bishop of Kraków Jan Lutek of Brzezie (24 May 1471). Their author was administrator of the diocese – Jan Rzeszowski (d. 1488). The registration of his activities lasted until 15 August 1471, when he was elected the new bishop of Kraków. The result of the registration is a 16-page scroll preserved in the Archives of the Kraków Metropolitan Court. It contains more than 120 entries concerning Rzeszowski's activities, mainly in judicial and economic matters. The purpose of the paper will be to present the role of Rzeszowski's records in the management processes of the diocese when he was its administrator. I will present the content of the records, how they were managed and who was responsible for it. The paper is a contributor to the discussion about two problems: the series "acta administratorialia" and the administrator's chancery.