Any foreign corporation, foreign bank or foreign real estate trust without being admitted to do business in this state, may loan money in this state only on real estate mortgages, deeds of trust and notes in connection therewith, and take, acquire, hold and enforce the notes, mortgages or deeds of trust given to represent or secure money so loaned or for other lawful consideration. All such notes, mortgages or deeds of trust taken, acquired or held are enforceable as though the foreign corporation, foreign bank or foreign real estate trust were an individual, including the right to acquire the mortgaged property upon foreclosure or under other provisions of the mortgage or deed of trust, and to dispose of the same. Any such corporation, bank or trust except banks and institutions whose shares, certificates or deposit accounts are insured by an agency or corporation of the United States government shall first file with the secretary of state a statement, signed by its president, secretary, treasurer or general manager, that it constitutes the secretary of state its agent for the service of process for cases limited to, and arising out of, such financial transactions, including therein the address of its principal place of business. Upon such service of process, the secretary of state shall forthwith forward all documents by registered or certified mail to the principal place of business of the corporation, bank or trust. Nothing in this section authorizes any such corporation, bank or trust to transact the business of a bank or trust company in this state.