Traditionally, registered mail was a manual process which gave rise to a great variety of distinctive
postal markings, like handstamps, and usage of registration labels. Many countries have issued special
postal stationery and
postage stamps for registered mail. Earlier similar services were known as
Money Letters. Today, the registration process is largely computerized with
barcode registration labels replacing the traditional analog labels having only a printed
serial number. Generally, the item is pre-paid with the normal postage rate and an additional charge known as a
registration fee. Upon payment of this fee the sender is given a receipt, and (usually) a unique numbered
registration label is affixed to the letter. As the letter travels from post office to post office and through any
sorting office, it has to be signed for on a ledger. This process is completed when the letter is delivered and the receiver signs for the item. With computerization and barcode technology, much of the logging once done manually has become simpler and leads to greater options for the sender and receiver alike to access the status of their shipment via the internet. Many postal authorities provide tracing information for registered items on their website. Internationally, the use of registered mail requires labels with a 13-digit reference number and corresponding barcode (UPU
S10). The first two letters indicate registration (usually "RR") while the last two letters usually represent the country where the registered item was posted.
E.g., RR913282511SG indicating Singapore, RB5584847749CN indicating China or RR123456785KR indicating South Korea. ==History==