Anytime any of your billing information changes, you will want to be sure to update it online.
From the home screen of the Frontpoint App:
Tap the Menu button
Tap on My Account towards the bottom of the drop-down menu
Scroll down to the Account Billing section
Tap on Add New Payment Type shown on green until the Build in Backup section
Type in all the information for the payment method of choice
Tap on the Set to Auto-pay button that appears over the new payment method.
Note: This section of the Frontpoint App will only appear if you are logged in using the primary login for your account. Any secondary logins you have created will not have access to this page.