610 ILCS 5/4
When the articles shall have been filed and recorded in the office of the Secretary of State, as aforesaid, the persons named as corporators therein shall thereupon become and be deemed a body corporate, and shall thereupon be authorized to proceed to carry into effect the objects set forth in such articles in accordance with the provisions of this Act. As such body corporate they shall have succession, and in their corporate name may sue and be sued, plead and be impleaded. The said corporation may have and use a common seal, which it may alter at pleasure; may declare the interests of its stockholders transferable; establish by-laws, and make all rules and regulations deemed necessary for the management of its affairs in accordance with law. A copy of any articles of incorporation filed and recorded in pursuance with this Act, or of the record thereof, and certified to be a copy by the Secretary of State, or his deputy, shall be presumptive evidence of the incorporation of such company, and of the facts therein stated.
610 ILCS 5/4