Ohio Revised Code Title LVII. Taxation § 5727.62

A person who appears before the department of taxation, on its order, as to the appraisal of property in any taxing district, shall be allowed and paid out of the treasury of the proper county, if an officer of any such taxing district, the person's actual and necessary traveling expenses, which shall be itemized and sworn to by the person who incurred the expense, and if other than any such officer, the person shall receive for attendance the fees and mileage provided for under section 119.094 of the Revised Code. Such traveling expenses and witness fees shall be audited and paid out of the county treasury of the proper county in the same manner as other expenses are audited and paid, upon the presentation of a certificate from the department certifying to the fact of such attendance.