Ohio Revised Code Title LIII. Real Property § 5309.27

If two or more persons are registered owners as tenants in common, or otherwise, of undivided interests in land, one owner's duplicate certificate of title may be issued for the whole land, or the owner of a separate or undivided interest may, upon the return and cancellation or proper notation upon the outstanding certificate, have a separate registration of his interest and a duplicate certificate of title issued to him.

A registered owner who holds one duplicate certificate for several distinct parcels of land may surrender such certificate and have separate registration and duplicate certificates for portions thereof, or if he holds separate duplicate certificates for several distinct parcels he may surrender them and have registration made of and take out a single duplicate certificate for the whole land, or several registration and duplicate certificates for different portions thereof. If a new or different plat and description is to be given in any new certificate so issued, such plat and description must be definite and certain and in conformity with the previously registered plat and descriptions and must be subject to the approval of the county recorder, who may in any case require the same to be approved by the court.

An owner who subdivides a tract of registered land into lots shall file with the clerk of the probate court or the clerk of the court of common pleas a plan thereof, when applying for a new certificate, and the probate court or the court of common pleas, before ordering such certificate to be issued, shall cause the plan to be certified and filed with the recorder and recorded, and require that all boundaries, streets, and passageways shall be distinctly and accurately delineated thereon.