When sending a package domestically, what document is required?

When sending a package domestically, a shipping label is essential because it contains crucial information needed for the delivery process. The shipping label includes the sender's address, the recipient's address, and a tracking number that enables both the sender and recipient to monitor the package’s journey. This document ensures that the package is directed to the correct location and facilitates its movement through the postal system.

A receipt for tracking, while important for verification, is not a mandatory document for sending the package itself. Insurance forms may be necessary if the sender opts for additional protection for valuable items, but they are not required for all shipments. A confirmation letter is not typically part of the package sending process; it may be used in some business transactions but does not serve as a standard requirement for shipping.