During account registration, NS1 asks you to provide a credit card to keep on file for general billing purposes and to cover any monthly limit overages. You can update the credit card information associated with your account via the NS1 portal.
To view the current payment method(s) associated with your account or organization, click your username in the upper-right corner of the portal and select Billing from the drop-down menu. Then, click the Payment Methods tab to view a list of credit cards associated with your account.
The card with the "Set as default" option enabled is the active card to which charges incur. You can enable this option for another card in the list to change the default payment method.
From the list of payment methods, click Add New Credit Card.
Enter the requested information and, optionally, enable the "Make this my default credit card" option to make this the default payment method.
Click Save Changes.