OpenCart Community

When you checkout from canada the shipping is free.
The Field in USPS shipping Module (Display Delivery Time:) shows as $0.00 during checkout.

Open Cart Version 1.5.6.4

USPS rate request format changed for Canada slightly, so you'll either need to get a commercial extension like USPS Pro (www.opencartx.com/usps-pro), or make some of the edits detailed in these topics:

http://forum.opencart.com/viewtopic.php?f=20&t=145905
http://forum.opencart.com/viewtopic.php ... 40#p564292