Which service allows for tracking and quick delivery of international packages?

Global Express Guaranteed (GXG) is the service that offers tracking and expedited delivery for international packages. This service is designed to meet the needs of customers who require urgent shipping to international destinations, providing delivery times as fast as 1 to 3 business days to select countries. GXG also includes tracking features that allow senders to monitor their package's progress from departure to arrival, ensuring transparency and peace of mind for both the sender and recipient.

In contrast, other services mentioned do not provide the same level of rapid delivery and tracking capabilities. Priority Mail International, while offering reliable delivery and tracking, generally has longer delivery times compared to GXG. First-Class Mail International is an economical choice for shipping small items internationally but lacks tracking and guarantees for delivery times. Media Mail is a domestic service specifically designed for shipping media items within the U.S. and does not apply to international shipping at all.