Ohio Revised Code Title VII. Municipal Corporations § 727.13

(A) Notice of the passage of a resolution of necessity and the filing of the estimated assessment under section 727.12 of the Revised Code, shall, after the estimated assessment has been made and filed as provided by section 727.12 of the Revised Code, be served by the clerk of the legislative authority, or a person designated by such clerk, upon the owners of the lots or parcels of land to be assessed for the proposed improvement, in the same manner as service of summons in civil cases, or by certified mail addressed to such owner at the owner's last known address or to the address to which tax bills are sent, or by a combination of the foregoing methods.

(C) The return of the person serving the notice or a certified copy thereof or a returned receipt for notice forwarded by certified mail accepted by the addressee or anyone purporting to act for the addressee shall be prima-facie evidence of the service of notice under this section.