Neb. Rev. Stat. § 25-1717

No bond for cost, appeal, supersedeas, injunction, or attachment shall be required of any county or of any officer, board, head of any board, department, head of any department, commission, head of any commission, agent, or employee of any county in any proceeding or court action in which the county or any officer, board, head of any board, department, head of any department, commission, head of any commission, agent, or employee of the county is a party litigant in its, his, or her official capacity.