On Mon, 23 Aug 2004 14:33:56 -0700, Brian Dunning
<[EMAIL PROTECTED]> wrote:
> The plot thickens. I added AVS *and* CVM to the site - and the Amex
> orders are still going through. Amex ignores CVM, and the address was
> correct, so the thieves must have gotten ahold of printed statements
> that show the billing address. Any idea how to combat THAT? They are
> using fake IP addresses now so I can't keep up by blocking IP's.
> 
> Your clever ideas appreciated.
> 

"Fake"? There's always a real IP on the other end or you can't
communicate with them. There *has* to be a way to get the real IP
address. How are you doing it now? What makes you think it's fake?

One thing nobody mentioned was a CAPTCHA. There's a new, simple, one in PEAR:
http://pear.php.net/package/Text_CAPTCHA
http://www.captcha.net/

I know they're annoying, but it could cut things down if they're
automating this.

You could also resort to the "create a login" method. Or even a "valid
e-mail address" option if you really want to stop them.

We implemented a nice one-step credit card, address, and login method
on www.pnicorp.com. Go to the link below and click "Continue
Checkout".
http://www.pnicorp.com/pniCart/?addItem=60

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