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The Postcode Address File (PAF) is a database that contains all known "delivery points" and postcodes in the United Kingdom. The PAF is a collection of over 29 million Royal Mail postal addresses and 1.8 million postcodes . [ 1 ]
A post town is a required part of all postal addresses in the United Kingdom and Ireland, and a basic unit of the postal delivery system. [1] Including the correct post town in the address increases the chance of a letter or parcel being delivered on time. Post towns in general originated as the location of delivery offices.
When combined with the ZIP + 4 code, the delivery point provides a unique identifier for every deliverable address served by the USPS. [1] The delivery point digits are almost never printed on mail in human-readable form; instead they are encoded in the POSTNET delivery point barcode (DPBC) or as part of the newer Intelligent Mail Barcode (IMb ...
Before an address can be certified as deliverable (CASS-certified), it must first be standardized. Standardization converts an address into a standard format by correcting the address, if possible, and adding missing information, such as a ZIP code, to produce a complete address containing a street address, city, state, and ZIP code.
Postal services in the United Kingdom are provided predominantly by the Royal Mail (and Post Office Limited which oversees post offices). Since 2006, the market has been fully opened to competition which has had greater success in business-to-business delivery than in ordinary letter delivery. [citation needed]
The full delivery address including postcode can be validated against the Royal Mail Postcode Address File (PAF), which lists 29 million valid delivery addresses, [27] constituting most (but not all) addresses in the UK. [28] A regular expression for validating UK postcodes is specified in the British Standards document BS 7666. [29]
POSTNET (Postal Numeric Encoding Technique) is a barcode symbology used by the United States Postal Service to assist in directing mail. The ZIP Code or ZIP+4 code is encoded in half- and full-height bars. [1] Most often, the delivery point is added, usually being the last two digits of the address or PO box number.
RM4SCC (Royal Mail 4-State Customer Code) [1] is the name of the barcode character set based on the Royal Mail 4-State Bar Code symbology created by Royal Mail. The RM4SCC is used for the Royal Mail Cleanmail service. It enables UK postcodes as well as Delivery Point Suffixes (DPSs) to be easily read by a machine at high speed.