Which feature is included with Priority Mail Express services?

Priority Mail Express services include a feature known as "Signature required," which is essential for ensuring secure delivery. This service provides customers with added peace of mind, as it requires the recipient to sign upon receipt, confirming that the package has reached the intended person. This feature is particularly valuable for sensitive or high-value items, as it provides a layer of accountability and tracking in the delivery process.

The other features mentioned in the options do not align with the standard offerings of Priority Mail Express. For instance, Limited tracking options would not accurately describe the service, as Priority Mail Express includes comprehensive tracking throughout the shipment process. While weekend delivery is available for some locations, it is not exclusive, making it misleading to label Priority Mail Express as offering weekend delivery only. Lastly, while there can be extra fees for certain locations in general postal services, Priority Mail Express is designed to provide set pricing for expedited service, which means that additional fees are not a standard part of what is presented with this particular service.