Utah Code § 17-22-20
Current with legislation effective through 5/2/2024
No direction or authority by a party or the party's attorney to the sheriff in respect to the execution of process or the return thereof or to any act or omission relating thereto is available to discharge or excuse the sheriff from liability for neglect or misconduct, unless it is contained in a writing, signed by the attorney of the party or by the party, if the party has no attorney.
Utah Code § 17-22-20