This Resource File controls the list of available credit cards when accepting payment and can be edited using the Portal Admin page.
Before changing the cards listed, be sure that your Authorize.NET account is configured to support payments from these cards.
Sample cards file
<?xml version="1.0" encoding="utf-8" ?>
<card value="VISA" name="Visa"></card>
<card value="MASTERCARD" name="MasterCard"></card>
<!-- <card value="DISCOVER" name="Discover"></card> -->
<!-- <card value="AMEX" name="American Express"></card> -->
You can comment-out a card when not in use by wrapping it in comment tags: <!-- --> (see sample above). This disables the items but leaves them in the file for future reference. The value for each card is important for proper configuration, so it is helpful to retain this in case you need it.