This API method allows you to cancel any watches you have for a single package.
How the cancel method works
Parameters for the API request
||Tracking Identifier||The tracking identifier of the package you wish to cancel. This identifier was returned in the response of the watch API call.||0WuD56wGyTeNekdxtUT3|
On success, redirects to a URL (as specified on your license key). See the default New Zealand Post page for an example.