805 ILCS 310/14

At any regularly called general or special meeting of the shareholders a written vote received by mail from any absent shareholder and signed by him may be read in such meeting, and shall be equivalent to a vote of each of the shareholders so signing; provided, he has been previously notified in writing of the exact motion or resolution upon which such vote is taken, and a copy of same is forwarded with and attached to the vote so mailed by him.