Mo. Rev. Stat. § 408.677
Government access to records, when — requirements.
408.677. Government access to records, when — requirements. — Except as provided in section 408.690 , no government authority may have access to or obtain copies of the information contained in the financial records of any customer unless the financial records are reasonably described and:
(1) Such customer has authorized such disclosure in accordance with section 408.682 ;
(2) Such financial records are disclosed in response to a subpoena which meets the requirements of section 408.683 ; or
(3) Such financial records are disclosed in response to a written request which meets the requirements of section 408.683 .
(L. 1989 H.B. 82 § 3)