To cancel registration and obtain a full refund of   tuition and fees, students must notify the registrar in writing prior to   the first day of classes. A student whose registration is canceled by the   registrar will receive a full refund of tuition and fees and prorated   charges for room and board, if applicable. Notification of cancellation   received on or after the first day of classes is treated, for billing   purposes, as a withdrawal and a refund is made based on the general   refund policy.