"registered mail"的定义和意义

What is "registered mail"?

Registered mail is a type of postal service that provides additional security and tracking for important or valuable items sent through the mail. When using registered mail, the sender receives proof of mailing, and the item is tracked at each stage of its journey until delivery. This service also includes a higher level of protection, as registered items are handled with extra care. In most cases, the recipient must sign for the item upon delivery, ensuring it reaches the intended person safely.