"Intl shipment release" is a FedEx tracking status that indicates the package has been processed and released by customs officials in the recipient's country. This phrase applies only to packages that are sent across borders via FedEx.
The international shipping process starts in the sender's country, where FedEx receives the package and takes it through customs, after which it is transported to the recipient's country. Once at the port of entry into the recipient's country, the package is checked by customs officials who execute the applicable taxes and custom duties. The package is then taken to a FedEx facility and is delivered to the recipient's address.