A last will and testament, except a nuncupative will, is invalid, unless it is in writing and executed in accordance with Title 75, Chapter 2, Part 5, Wills. When a will is to be shown, the instrument itself shall be produced, or secondary evidence of its contents given.
Utah Code § 78B-5-611
Proof of wills
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.