What is a key aspect of the security features of Registered Mail?

A key aspect of the security features of Registered Mail is the accountability measures throughout the delivery process. Registered Mail is designed to provide a heightened level of security for valuable items by ensuring that each stage of the delivery is meticulously tracked and documented. Each item in Registered Mail is assigned a unique tracking number, which allows senders and recipients to monitor its location throughout its journey. Additionally, the process involves strict handling procedures and often requires a signature at various transit points to verify receipt, thereby creating a chain of custody. This level of accountability is crucial for securing valuable or sensitive items, giving senders peace of mind that their mail is being handled with the utmost care and security until it reaches its final destination.