LISLE, Ill., MISSISSAUGA, Ontario, & STAMFORD, Conn.--May 5, 2003-- Moore Corporation Limited and Wallace Computer Services, Inc. announced today that the closing date for their merger is scheduled for Thursday May 15, 2003. Under the terms of their merger agreement, the Election Deadline is therefore fixed at 5:00 p.m., New York City time, Monday May 12, 2003. This is the deadline by which all Wallace stockholders must submit to the exchange agent their forms of election indicating the type of consideration they wish to receive. Wallace stockholders may elect to receive either cash or Moore common shares in exchange for their Wallace common shares, subject to the pro-ration provisions of the merger agreement. Any Wallace stockholder who does not submit a valid election form to the exchange agent by the Election Deadline will be deemed to have no preference as to the form of consideration such stockholder will receive. Completion of the merger remains subject to the terms and conditions of the merger agreement between Moore and Wallace.