Ohio Revised Code Title XXVII. Courts Revised Code General Provisions Special Remedies § 2712.09

(A) Unless otherwise agreed to by the parties, any written communication is deemed to have been received if it is delivered to the addressee personally or if it is delivered at his place of business, habitual residence, or mailing address, and the communication is deemed to have been received on the day it is so delivered.

(B) If none of the places referred to in division (A) of this section can be found after making reasonable inquiry, a written communication is deemed to have been received if it is sent to the addressee's last-known place of business, habitual residence, or mailing address by certified mail, return receipt requested, or by any other means that provides a record of the attempt to deliver it.

(C) This section does not apply to written communications in court proceedings.