S.C. Code Ann. § 33-31-1501: Authority to transact business required.

(a) A foreign corporation may not transact business in this State until it obtains a certificate of authority from the Secretary of State.

(b) The following activities, among others, do not constitute transacting business within the meaning of subsection (a):

(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 or any other rights in property securing the debts;

(9) owning, without more, 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;

(12) soliciting those contributions as are defined in Section 33-55-20(3) or any succeeding statute of like tenor and effect.

(c) The list of activities in subsection (b) is not exhaustive.