Registered mail is a way to secure mail sent through the U.S. Postal Service. A sender can insure and track the progress of the letter as it makes its way to the intended recipient. The recipient is required to sign for the letter.
Registered mail is a good choice for sending time-sensitive paperwork, checks, money orders or other sensitive information if the sender is concerned about it getting lost in the mail. A sender can insure registered mail for up to $25,000, track it online using the USPS website, and require a signature of the recipient. Once the recipient signs for the letter, the sender can obtain a copy of the signature from the USPS website in order to verify that the signature is that of the intended recipient.
In order to send a letter by registered mail, the sender must take the letter to a USPS office and request that the letter be sent by registered mail. The post office charges extra fees for registered mail. A tracking number is provided on the receipt, and the sender uses that number to track the package online. USPS does not provide delivery status online for registered mail sent to APO or FPO military addresses.