Ohio Rev. Code Ann. § 5715.18

In addition to the printed notice prescribed in section 5715.17 of the Revised Code, the tax commissioner may provide such additional notice of any change made in the assessment of any tract, lot, or parcel of real estate, or improvement thereon or minerals or mineral rights therein in such form and at such times as the commissioner deems advisable. Such additional notices shall be delivered to the parties interested by the method the commissioner orders.