Neb. Rev. Stat. § 25-21,216

No bond for costs, appeal, supersedeas, injunction, or attachment shall be required of the State of Nebraska, or of any state officer, state board, state commission, head of any state department, agent or employee of the state, the Director of Banking and Finance as receiver of insolvent state banks, or any receiver appointed on the application of the State of Nebraska, in any proceedings or court action in which said state, officer, board, commission, head of department, agent, or employee is a party litigant in its or his official capacity.