The Card Updated event triggers any time your customer has updated their card.

If the customer is updating their card after a failed payment has occurred, all unpaid balances will be processed immediately. If they are on a subscription, it will be set to Active status. 

This event is most commonly used as a goal to stop other follow-up campaigns and automations that other Billing Automation Events have previously started. It’s also common to set up this event to trigger a single customer email, confirming that their credit card has been updated.