Mo. Rev. Stat. § 355.751: Foreign corporation, certificate of authority — transportation of business.

1. A foreign corporation may not transact business in this state until it obtains a certificate of authority from the secretary of state.

2. The following activities, among others, do not constitute transacting business within the meaning of subsection 1 of this section:

(1) Maintaining, defending, or settling any proceeding;

(2) Holding meetings of the board of directors or members or carrying on other activities concerning internal corporate affairs;

(3) Maintaining bank accounts;

(4) Maintaining offices or agencies for the transfer, exchange, and registration of memberships or securities or maintaining trustees or depositaries with respect to those securities;

(5) Selling through independent contractors;

(6) Soliciting or obtaining orders, whether by mail or through employees or agents or otherwise, if the orders require acceptance outside this state before they become contracts;

(7) Creating or acquiring indebtedness, mortgages, and security interests in real or personal property;

(8) Securing or collecting debts or enforcing mortgages and security interests in property securing the debts;

(9) Owning real or personal property;

(10) Conducting an isolated transaction that is completed within thirty days and that is not one in the course of repeated transactions of a like nature;

(11) Transacting business in interstate commerce.

3. The list of activities in subsection 2 of this section is not exhaustive.