The credit card information is removed automatically for the Processed and Completed orders only by default. You are able to change this behavior by editing the settings of the order statuses on the Order statuses page (the link to this page is in the Orders tab of the administration panel):
- Log in to your administration panel and open the Orders tab.
- Click on the Order statuses link.
- Click on the edit link of the desired status.
- Select the Remove CC info check box.
- Click on the Save button to save the changes.
NOTE: When an order has a status for which the Remove CC info option is enabled the credit card information of this order will be removed.