If you are a foreign / out-of-state corporation and need to file suit in North Carolina, you will first need to file a Certificate of Authority with the Secretary of State, and as of the date of this post, that will cost you $250.00.
This is a prerequisite; if you do not have a Certificate of Authority on file in North Carolina prior to filing suit, your case will be thrown out of court. You can click the following link to get a Certificate of Authority form. You will have to scroll down to Form B-09. Instructions are included on page three of that form.