I've been using an ECM competitor[1] for about 3 years and, like saurik, I've not run into this problem with either my banks or the IRS. The USPS does provide t

I've been using an ECM competitor[1] for about 3 years and, like saurik, I've not run into this problem with either my banks or the IRS. The USPS does provide that data, but to my knowledge it doesn't come as part of the standard address verification APIs. 1. http://www.virtualpostmail.com http://www.virtualpostmail.com