In which context is PS Form 153 used?

PS Form 153 is utilized specifically for Signature Confirmation, which is a service that provides proof of delivery through the recipient's signature. This form is important as it aids in confirming that the mail was received by the intended recipient, enhancing the reliability of deliveries. The signature also provides a layer of security and assurance for both the sender and the recipient, ensuring that the item has not only been delivered but has been acknowledged by the individual to whom it was sent.

The other options pertain to different postal services or forms that serve distinct purposes. For instance, collecting postage would involve different procedures and forms that directly deal with postage payment, while confirming the identity of a letter recipient generally requires a different verification method. A Delivery Notice is used to inform the recipient that a package could not be delivered, and does not pertain to the signature confirmation process that PS Form 153 addresses. Understanding the specific functionalities of various postal forms, like PS Form 153 for Signature Confirmation, is essential for effective retail clerking within the USPS framework.