The United States Postal Service provides tracking options for most packages and letters shipped to Canada. The USPS does not, however, ship or track Priority Mail International Fat Rate envelopes or small Flat Rate shipped boxes to Canada.
When shipping to Canada or one of the other 180 countries worldwide, the USPS limits the package weight to 70 pounds but does provide tracking through the online system for all international packages and letters. Customers can log into the postal service's website, enter the tracking number and track the package or letter as it travels internationally. A customer may qualify for free package pickup through the USPS online shipping service.