A.R.S. § 12-303: Witness fees and mileage

A material witness attending the trial of a civil action shall be paid twelve dollars for each day's attendance to and including the time it was necessary for him to leave his residence and go to the place of trial and his discharge as a witness. The witness shall also be paid mileage at the rate of twenty cents for each mile actually and necessarily traveled from his place of residence in the state of Arizona to the place of trial, to be computed one way only.