Iowa Code § 622.69: Witness fees.

1. Witnesses shall receive ten dollars for each full day’s attendance, and five dollars for each attendance less than a full day, and mileage expenses pursuant to section 602.1509 for each mile actually traveled.

2. Witness fees to be received by an inmate, while in the custody of the department of corrections, shall be applied either toward payment of any restitution owed by the inmate or to the crime victim compensation program established in sections 915.80 through 915.94.