We ask you to provide a credit card for some free trials so that we do not have to interrupt your service when the trial period expires. We will notify you via email (at the email address you provided with your registration) before the trial expires so that you may cancel your trial if you wish. If you cancel your free trial before the end of the trial period, your credit card will NOT be billed. You can cancel your free trial at any time during the trial period without being charged.