Missouri Revised Statutes Title XXIV. Business and Financial Institutions § 362.435. Foreign banking corporation may transact business in this state, when

1. No foreign banking corporation, other than a bank organized under the laws of the United States, shall transact in this state the business of buying, selling or collecting bills of exchange, or of issuing letters of credit or of receiving money for transmission or transmitting the same by draft, check, cable or otherwise, or of making sterling or other loans or transacting any part of such business, or maintaining in this state any agency for carrying on such business, or any part thereof, unless such corporation shall have:

2. This section shall not be construed to prohibit foreign banking corporations which do not maintain an office in this state for the transaction of business from making loans in this state secured by mortgages on real property, nor from accepting assignments of mortgages covering real property situated in this state, nor from making loans through correspondents which are engaged in the business of a bank or trust company in this state under the laws of the state.