Originally Posted by
isladar
It's been said, but I'd rather it be repeated:
Once you have gone to the VbV or Mastercard Securecode site and registered your card and designated your password, you MUST update your billing information in POL.
You'll put in everything exactly as it was (unless in order to be verified you've had to switch cards), and then POL will give you a link to a browser window that opens OUTSIDE of POL. Don't do this while running windower like I did and almost shit myself when POL crashed. This page will be a magic POL verification site, wherein you enter the VbV or Securecode password you made when registering for either of those services.
Upon completion, you'll go back to POL, click submit, and you're done.
Again, simply making your card 3D secure, or having that service already, is not enough: you MUST update your billing information in POL.