Neb. Rev. Stat. § 23-1602: Neb. Rev. Stat. § 23-1602

All warrants issued by the county board shall, upon being presented for payment, if there are not sufficient funds in the treasury to pay the same, be endorsed by the county treasurer not paid for want of funds, and the county treasurer shall also endorse thereon the date of such presentation and sign his or her name thereto. Warrants so endorsed shall draw interest from the date of such endorsement, at the rate to be fixed by the county board at the time of issuance and inserted in the warrant. No account or claim whatsoever against a county, which has been allowed by the county board, shall draw interest until a warrant has been drawn in payment thereof and endorsed as provided in this section.