Utah Code Ann. § 75-3-1201
(1) Thirty days after the death of a decedent, any person indebted to the decedent or having possession of tangible personal property or an instrument evidencing a debt, obligation, stock, or chose in action belonging to the decedent shall pay the indebtedness or deliver the tangible personal property or an instrument evidencing a debt, obligation, stock, or chose in action to a person claiming to be the successor of the decedent upon being presented an affidavit made by or on behalf of the successor stating that: