Which of the following is NOT a type of Extra service offered by USPS?

The service that is not classified as an Extra service offered by USPS is Remote location delivery. Extra services are specifically designed options that provide additional features or benefits beyond standard mail services.

Certificate of Mailing, Signature Confirmation, and Restricted Delivery are all recognized Extra services intended to enhance the security and tracking of mail.

Certificate of Mailing provides proof that an item was mailed, which can be important for legal or compliance purposes. Signature Confirmation ensures that the recipient's signature is obtained upon delivery, providing an added level of security and assurance for the sender. Restricted Delivery, likewise, ensures that only the addressee or an authorized agent can receive the mail, adding another layer of security.

In contrast, Remote location delivery is not recognized as an official Extra service by USPS. This indicates that it does not offer any of the additional tracking, security, or documentation benefits associated with Extra services. As such, it is not included in the category of services that provide enhancements to the mailing process.