Ohio Rev. Code § 4505.03: Certificate of title.

No person, except as provided in sections 4505.032 and 4505.05 of the Revised Code, shall sell or otherwise dispose of a motor vehicle without delivering to the buyer or transferee of it a certificate of title with an assignment on it as is necessary to show title in the buyer or transferee; nor shall any person, except as provided in section 4505.032 or 4505.11 of the Revised Code, buy or otherwise acquire a motor vehicle without obtaining a certificate of title for it in the person's name in accordance with this chapter.