Mo. Rev. Stat. § 184.108

A museum shall give the lender or claimant written notice of any known injury to or loss of loaned property, in the form required under this section. The director shall adopt by rule a form of notice of injury or loss, no later than December 31, 1991, and shall distribute the rule and form to all identified museums in this state within sixty days after the promulgation of the rule. The notice shall be mailed to the lender's or claimant's last address of record within thirty days after the date on which the injury or loss is first known by the museum. Published notice of injury to or loss of undocumented property shall not be required.