Mo. Rev. Stat. § 144.625: Vendors may be required to give bond.

To secure the payment of the tax, interest and penalties, which may become due from a vendor as provided in sections 144.600 to 144.745, the director of revenue may, where necessary to secure the payment of the tax, interest, and penalties require all vendors to file a bond or a letter of credit in an amount to be determined by the director, under the same requirements as provided in section 144.087.