Ohio Revised Code Title LIII. Real Property § 5321.18

(A) Every written rental agreement for residential premises shall contain the name and address of the owner and the name and address of the owner's agent, if any. If the owner or the owner's agent is a corporation, partnership, limited partnership, association, trust, or other entity, the address shall be the principal place of business in the county in which the residential property is situated or if there is no place of business in such county then its principal place of business in this state, and shall include the name of the person in charge thereof.

(B) If the rental agreement is oral, the landlord, at the commencement of the term of occupancy, shall deliver to tenant a written notice containing the information required in division (A) of this section.

(C) If the landlord fails to provide the notice of the name and address of the owner and owner's agent, if any, required under division (A) or (B) of this section, the notices to the landlord required under division (A) of section 5321.07 and division (A) of section 5321.08 of the Revised Code shall be waived by the landlord and his agent.