A tax is deemed to have been levied when it has been voted by the tax levying board and certified to the county auditor. Each certificate of indebtedness issued wholly or in part against revenues that consist of levied and uncollected taxes must bear the certificate of the county auditor to the effect that it, together with all other outstanding certificates issued wholly or in part against revenues that consist of levied and uncollected taxes, is within the amount of uncollected taxes that have been levied lawfully in the then present year, plus uncollected taxes of the four preceding years. A county auditor who willfully signs a false certificate upon a certificate of indebtedness is guilty of a class A misdemeanor.