Nebraska Statutes: 23-1511
23-1511. Deed record; mortgage record; duty to keep. In counties where the book form of recording instruments is used, different sets of books shall be provided for the recording of deeds and mortgages. In one of the sets all conveyances absolute in their terms and not intended as mortgages or as securities in the nature of mortgages shall be recorded, and in the other set such mortgages and securities shall be recorded.