Ohio Rev. Code Ann. § 5301.19

When lands or tenements are mortgaged to the state to secure the payment of money due the state, and the money so secured, together with the legal interest due thereon, is paid to the treasurer of state, or other person authorized to receive it, the governor shall sign and deliver to the mortgagor, his heirs, or assigns, a deed of release of the real estate so mortgaged.