Utah Code Ann. § 78B-8-302
(2) Except as provided in Subsection (5), the following persons may serve all process issued by the courts of this state:
(3) Private investigators licensed in accordance with Title 53, Chapter 9, Private Investigator Regulation Act may not arrest anyone pursuant to a bench warrant. While serving process, a private investigator shall:
(a) have on the investigator's person a visible form of credentials and identification identifying:
(c) print on the first page of each document served:
(4) Any service under this section where the use of force is authorized on the face of the document, a breach of the peace is imminent, or likely under the totality of the circumstances may only be served by:
(5) The following persons may not serve process issued by the courts:
(6) A person serving process shall: