Students are responsible for ensuring that required written coursework is submitted and received on time. Written work should not be left in open mailboxes or other unattended places but rather given personally and directly to the head of the course or a responsible person acting on his or her behalf. Papers that are mailed to instructors should be sent by certified mail, and a receipt of delivery should be requested from the Postal Service. The student should keep both the postal receipt and a copy of the paper. If work is submitted electronically, students are responsible for confirming receipt.