Nebraska Revised Statute 21-19,146
(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) 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, without more, real or personal property;
(10) Conducting an isolated transaction which is completed within thirty days and which is not one in the course of repeated transactions of a like nature; or
(11) Transacting business in interstate commerce.
(c) The list of activities in subsection (b) of this section is not exhaustive.
Laws 1996, LB 681, § 146.