Ohio Rev. Code Ann. § 2335.07

The sheriff or other officer serving a writ or subpoena shall indorse thereon the number of miles to which each witness is entitled as provided by sections 2335.05 and 2335.06 of the Revised Code. Each judicial officer returning witnesses under recognizance to any court for the trial of criminal causes shall indorse on his transcript the number of miles to which each such witness is entitled.