The United States Postal Service (USPS) provides Priority Mail Express[1] for domestic U.S. delivery, and offers two types of international Express Mail services, although only one of them is part of the EMS standard. One is called Priority Mail Express International[2] and the other service is called Global Express Guaranteed (GXG).[3] The latter has no relation to "EMS" International service as provided by the EMS Cooperative.
The USPS Global Express Guaranteed (GXG),[4] involves USPS offices acting as drop locations for international packages which are then handled by FedEx international delivery network.
In some countries, import rules for packages received by courier services have different tax brackets and duties than parcels received on the postal system, and thus[5] EMS service (Express Mail International) may be preferred over FedEx's co-branded Global Express Guaranteed.
The term Priority Mail Express International is distinct from the domestic service called Priority Mail Express, which is a specific classification of mail for domestic accelerated postal delivery within the U.S.
In 2013, the USPS changed the name of the service from "Express Mail International" to "Priority Mail Express International".[6]