Ohio Rev. Code § 729.03
Notice of the passage of a resolution of necessity under section 729.02 of the Revised Code shall be served by the clerk of the legislative authority, or a person designated by such clerk, upon the owners of the lots or lands abutting upon the sidewalks, curbs, or gutters to be constructed or repaired in the same manner as service of summons in civil cases, or by certified mail addressed to such owner at his last known address or to the address to which tax bills are sent, or by a combination of the foregoing methods. If it appears by the return of service or the return of the certified mail notice that one or more of the owners cannot be found, such owners shall be served by publication of the notice once in a newspaper of general circulation within the municipal corporation. 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 him shall be prima-facie evidence of the service of notice under this section. Such notice shall also set forth the place where the specifications governing the construction or repair of such sidewalks, curbs, or gutters are on file, the time within which the owner of such lot or parcel of land may construct or repair such sidewalks, curbs, or gutters, and that in the event such owner does not construct or repair such sidewalks, curbs, or gutters in accordance with such specifications and within such time, the municipal corporation will construct or repair such sidewalks, curbs, or gutters and assess the costs thereof against the lot or land of such owner.
R.C. §729.03