Credit Card Checker

If you were wondering about the comment, it was just a little joke. Anyway I read MathManiac's comment but I gotta point out frauders already know that credit card numbers use a special formula. It's common knowlege to almost anyone who works with credit cards. But there is still such a huge combination of possible numbers, and they have to match a name and a billing address, and a security code, it's pretty tough to make up a fake credit card without already having access to someone's actual information.