Which type of service provides signature confirmation?

The service that provides signature confirmation is categorized under extra services. This option includes additional features that can be added to various mailing services to enhance the security and trackability of a shipment. Signature confirmation specifically ensures that the recipient's signature is obtained upon delivery, providing the sender with proof that the item has been received.

This service is often utilized in situations where it's critical to verify delivery, such as for important legal documents or valuable items. While both Priority and Express Mail offer various levels of tracking and delivery guarantees, signature confirmation is not inherently a part of those services unless specifically added as an extra feature. Standard Mail, on the other hand, does not provide tracking services or signature confirmation, as it is designed for bulk mailings and lower-cost options.

Therefore, identifying signature confirmation under extra services reflects a clear understanding of how USPS categorizes and offers its various mailing options to meet different customer needs.