Q: How do I turn off auto-renewal and cancel my .Mac membership?
To cancel your .Mac membership for the following year, go to Account and click the "Credit Card Info" button. Uncheck the "Auto-Renew" checkbox and click "Submit". The main Account page will then show that your account is set to expire on your anniversary date. Your credit card will not be charged for the following year, and you will receive a notice on your anniversary date that your account has expired.