Credit cards numbers / expiration

[frosty]

ok, i know a lot has been made of the way AC always saves an order. Just wondering if a method exist in the API that will check for valid credit card numbers and expiration dates. I am using paypal which returns a 107xx error if the billing address is incorrect.

Why can it not the same look up on expiration date?

and

Why does

Transaction authTx = GetLastAuthorization(lastPayment);
authTx.TransactionStatus == TransactionStatus.Successful);

even if c-card number or exp date is incorrect.

[sohaib]

Please see this post
viewtopic.php?f=42&t=8852