Selecting a valid credit card for default payment ensures all your requests are processed seamlessly in the system.
For example, the primary credit card will be automatically charged when you request a shipment. If that payment fails, the backup credit card will be automatically charged.
1. Log In To Your Account and click Settings:
Click on Payment Details to view your available methods of payment.
2. Select a primary or backup credit card
Go to the card you want to use for primary or backup, and click "Set this as primary or backup".
Choose whether you want the card you've selected to be Primary or Backup. You should get confirmation next to the card. The selected card is now ready for all requests.