Mo. Rev. Stat. § 408.096

No person, firm or corporation shall receive or impose any fee or charge, other than one expressly provided for by statute, for arranging credit in the amount of one thousand dollars or less the proceeds of which are intended to be used by the borrower primarily for personal, family or household purposes. Any contract evidencing such excess fee or charge and any note evidencing credit so arranged is void. Any person, firm or corporation who receives or imposes a fee or charge prohibited by this section is guilty of a class B misdemeanor.