We have implemented, for Canada Post, the ability to void shipments that have been already manifested. In this scenario techSHIP will make a call to CanadaPost and request a deletion of an order already manifested. We have also added an email address at the carrier setup page to send a notification once the shipment has been cancelled by Canada Post. The email will be sent by CanadaPost. Notice that CanadaPost will not cancel the shipment immediately but instead creates a case that gets processed at a later time. Email notification will be sent once the case has been processed.

In the case where CanadaPost does no require a manifest the cancelation can only be sent one hour after the shipment has been created on CanadaPost end or an error will be received. This is a limitation on CanadaPost end.