The process by which the attendance of a witness is required is a subpoena. It is a writ or order directed to a person and requiring the person's attendance at a particular time and place to testify as a witness. The person may also be required to bring any books, documents, or other things under the person's control which is required to be produced in evidence.
Utah Code § 78B-1-129
Witnesses -- Subpoena defined
Renumbered and Amended by Chapter 3, 2008 General Session
Official source: Utah State Legislature. Reproduced from public-domain Utah statutes; confirm against the official source for the current text. Not legal advice.