What benefit does "certified mail" provide?

Certified mail is a service provided by postal carriers that offers important benefits to the sender. One of the primary advantages of certified mail is that it provides proof of mailing and delivery. This means that when an item is sent via certified mail, the sender receives a mailing receipt at the time of mailing. Additionally, the recipient is required to sign for the item upon delivery, which generates a delivery record that can be accessed by the sender. This process ensures that there is an official record of the item being sent and received, making it particularly valuable for legal documents, sensitive communications, and important transactions.

The option that mentions free shipping for large packages is not accurate as certified mail does not offer any shipping costs tailored to package size. Similarly, delivery to PO boxes only is not a limitation of certified mail, as it can be delivered to various locations, including residential addresses. Lastly, the idea of an immediate delivery guarantee is not a feature of certified mail, as it does not promise expedited delivery like some other postal services might offer. Thus, the provision of proof of mailing and delivery is the key benefit that certified mail ensures for its users.