Ohio Revised Code Title LIII. Real Property § 5301.10

The plaintiff in an action to cancel a lease or license mentioned in section 5301.09 of the Revised Code, or in any way involving it, in order to finally adjudicate and determine all questions involving such lease or license in such action, need only make those persons defendants, so far as such lease or license is involved, who claim thereunder and are in actual and open possession, and those who then appear of record, or by the files in such office, to own or have an interest in such lease or license. If there is no claimant in actual and open possession, and no persons whose interest appears of record or file, then so far as such lease or license is involved, it will only be necessary to make the original lessee or licensee defendant in order to finally adjudicate and determine all questions concerning such lease or license.