Ohio Rev. Code § 5721.29
The county auditor shall keep a record of all delinquent lands sold by proceedings pursuant to Chapters 5721. and 5723. of the Revised Code wherein he shall enter each procedural step required by Chapters 5721. and 5723. of the Revised Code.
Each county auditor shall compile and make up, in tabular form and alphabetical order, separate lists of the names and description of the property as it appears on the tax list, date of sale, name of purchaser, amount bid, amount paid, costs, total, and date of county auditor's or sheriff's deed.
The county auditor shall compile a complete alphabetical index, direct and reverse, of all sales, after the completion of the annual sale, of all lots and lands, advertised for sale pursuant to section 5723.05 of the Revised Code.
A certificate that all procedural steps have been complied with shall be made on a form as prescribed in section 5715.30 of the Revised Code, and said certificate shall bear the county auditor's signature with his official seal affixed thereto. Said certificate shall be received in all courts within the state, as prima facie evidence of the existence of such instruments, and as conclusive evidence of the existence of such records.
R.C. §5721.29