Originally Posted by
ALadyNCal
Incorrect. You cannot make up any numbers, it immediately knows if you have an invalid number. You can't even submit your bid.
The poster didn't say "make up any numbers." What was said, in case you missed it:
"mod-10 algorithm (you can easily come up with your own if you google anatomy of credit card numbers)."
Not that I agree with it, but you totally misinterpreted the post.