In my admin panel I can see the Paypal IPN's and I am now taking credit cards via Auth.net AIM.
I want to make sure none of this is available to hackers. How can I tell if my site is storing card numbers and IPN's?
I am about to setup eChecks through Auth.net as well. I don't want to store anything from those either.
I do however plan in the future to offer layaway and allow customers to make their own payments so I don't want to interfere with that either.