Ohio Rev. Code § 321.17: Indorsement and interest on warrants not paid.

When a warrant is presented to the county treasurer for payment, and is not paid, for want of money belonging to the particular fund on which it is drawn, the treasurer shall record the warrant as not paid for want of funds. The warrant shall thereafter bear interest at the rate of six per cent per year. A memorandum of all such warrants shall be kept by the treasurer.