The use of books in churches was established from the 7-th century A.D. The 6-th Trulan Synod legislated, in the 68- th Canon, the ban of damaging or selling books to those who didn’t use them for Holy purposes. The canonical basis of the religious censorship is stipulated also in the Canon 103 of the 8-th local Synod in Cartagena. Church Law regulated even the cases of stolen books - they must be returned to their owner. By settling on sanctions against those who could affect, one way or another, the integrity of the books, the Canons also offer the necessary basis for understanding the role of the curses written on the books. The application of these canonic rules was introduced in the Romanian territories too, the reference area for this was Moldova; the documentary basis, beside the Church law books, also includes the notes written on the books.