title: Test REAL credit card #'s and CVV with authorize.net
body: <p>My client would like to test his application using real credit card #'s and real cvv codes.  We don't want to charge the cards, but we do want the system to act the way it would in production.  Namely, it should validate both the CC # and CVV codes.  Is there a way to do this with authorize.net?  We are currently in "live mode" in the sandbox at <a href="https://sandbox.authorize.net" rel="nofollow">https://sandbox.authorize.net</a>.  </p>