Subject to the provisions of subdivision (a) of Section 208, any note, mortgage, evidence of indebtedness, contract, share certificate, initial transaction statement or written statement, conveyance, or other instrument in writing, and any assignment or endorsement thereof, executed or entered into between any corporation and any other person, when signed by the chairperson of the board, the president or any vice president and the secretary, any assistant secretary, the chief financial officer or any assistant treasurer of such corporation, is not invalidated as to the corporation by any lack of authority of the signing officers in the absence of actual knowledge on the part of the other person that the signing officers had no

authority to execute the same.