FINRA has changed its rules regarding fees for canceling and rescheduling exams. Beginning September 1, 2011, if you cancel or reschedule an exam within 3-10 business days of the scheduled date, you will be charged one-half of the exam fee being canceled or rescheduled. If you cancel or reschedule within two days prior to the exam date, you will be charged the full exam fee.
You can check out the full notice from FINRA by clicking here.