First, you will need to login to MyADT.com. Click the Account tab from the left navigation and click Update Payment Method. If you have already entered at least one payment method, choose it from the Saved Payment Methods. If you are enrolled in ADT® EasyPay, then click the Manage EasyPay button
To add a new method, click the link for Add New Payment Method, then enter the card or bank account information.
To save the new method information, click the box next to Save account information for future use and click Submit.