Ohio Rev. Code § 1311.07: Copy of affidavit to be served on owner or lessee.

Any person filing an affidavit pursuant to section 1311.06 of the Revised Code shall serve a copy of the affidavit on the owner, part owner, or lessee of the improved property or his designee, within thirty days after filing the affidavit. If the affidavit cannot be served in accordance with section 1311.19 of the Revised Code, then the person shall serve the copy by posting it in some conspicuous place on the premises of the improved property within ten days after the expiration of the thirty days.