Mo. Rev. Stat. § 443.857: Licensee shall maintain at least one full-service office with staff, duties to handle matters relating to mortgage — waiver, when.

Each residential mortgage loan broker shall maintain, in the state of Missouri, at least one full-service office with staff reasonably adequate to efficiently handle all matters relating to any proposed or existing home mortgage with respect to which such residential mortgage loan broker is performing services; except that, this provision may be waived by the director for persons providing mortgage loan servicing or exclusively engaged in the business of loan processing or underwriting as defined in this chapter.