Blogger and Xboxic reader Jmel highlights the struggles faced with the billing procedures of Live accounts.
According to Major Nelson:
"I confirmed that you CAN get your CC removed from your account. It will take a call to support and a few days, but it can be done."
Upon ringing a few days later, Jmel finds that, in actual fact, support say no, the card cannot be removed. A few supervisors later and they apparently say the card will be removed within 7-10 business days. However given that the staff on the end of the phone were so uncertain, it is unlikely that it will ever happen.