Neb. Rev. Stat. § 77-1616

The tax list shall be completed by the county assessor and delivered to the county treasurer on or before November 22. At the same time the county assessor or county clerk shall transmit a warrant, which warrant shall be signed by the county assessor or county clerk and shall in general terms command the treasurer to collect taxes therein mentioned according to law. No informality therein, and no delay in the transmitting of the same after the time above specified, shall affect the validity of any taxes or sales, or other proceedings for the collection of taxes as provided for in this chapter. Whenever it shall be discovered that the warrant provided for in this section was not at the proper time attached to any tax list, or was not transmitted as herein provided for any preceding year or years, in the hands of the county treasurer, the county assessor shall forthwith attach or transmit such warrant, which shall be in the same form and have the same force and effect as if it had been attached to such tax list, or transmitted as herein provided, before the delivery thereof to the county treasurer.