During the reign of Jaume II the organization of the Chancellery and the real administration receives an almost definitive push. The series of registries acquire a more complete and definitive diversification, that gave rise to the creation of new series and one more a more coherent distribution of the documentation copied in them. A new series of this reign is the one of the registries "Officialium", in which the appointments of real officials of Aragon, Catalonia, Valencia and Murcia were copied. The present work contributes data for the study of the elaboration documentary of the appointments of the Catalan real officials.