Neb. Rev. Stat. § 23-1517: Neb. Rev. Stat. § 23-1517

The register of deeds shall keep indices showing all mortgages, including documents provided for in subdivision (a)(1) of section 9-501 , Uniform Commercial Code, and discharges thereof left for record, and entitled to be recorded, in the same form as is required for deeds. He or she shall also keep a separate index to the volumes of construction lien records and to the volumes of miscellaneous records.