Mo. Rev. Stat. § 443.930
1. It is unlawful for a person, in connection with the application for or procurement of a loan secured by real estate to:
(4) Influence, through extortion or bribery, the development, reporting, result, or review of a real estate appraisal, except that this subsection does not prohibit a mortgage lender, mortgage broker, mortgage banker, real estate licensee, or other person from asking the appraiser to do one or more of the following:
(L. 2008 H.B. 2188)