in internal barcodes fall within the range of V–Z. PostBar.C10: * Z ANANAN [RS-30] BBBB * Business reply mail 52 bar long 4-state barcodes are used by Canada Post for business reply mail (BRM) addressing and payment. As of 2013 or earlier the previous BRM barcode, which were Code 93-type barcodes, were deemed non-machineable. An extended 73 bar long BRM barcode 'C73' , scheduled for availability from 2011, was indefinitely postponed. Caveat Lector The PostBar barcode dimensions, formats, and symbology examples in Canada Post 4-State Bar Code Handbook and as actually implemented by Canada Post are significantly different from the formats and symbology described in this article and in . For PostBar format D12, as described in this article and shown here, the Postal Code is encoded using fifteen bars and the 'A' and 'N' character sets. The Address Locater encodes four alphanumerics using twelve bars and the 'Z' characters set. This format also includes a space character and twelve bars for Reed-Solomon error correction for a total count of forty nine bars. On the other hand, PostBar format D52.01, as described in and shown here, encodes the Postal Code using only twelve bars and an unknown symbology. It encodes nine alphanumerics in the Address Locater field using twenty one bars and another unknown symbology. It does not include any fields for space characters, but it does include twelve bars for Reed-Solomon error correction for a total count of fifty two bars. Most significantly these two different formats use exactly the same code for their Data Content Identifier field; specifically two Full Height bars and an Ascender () which corresponds to a 'B' character using the 'Z' symbology. From samples of mail being delivered by Canada Post, the D52.01 format with an unknown symbology is the implemented standard, and not format D12 as described in this article. Postal customers who attempt to include a D12 formatted PostBar code, or any other PostBar format or symbology as described in this article may find it is misinterpreted by Canada Post's sorting machinery. This could possibly delay or even prevent their mail being delivered. See also RM4SCC – The barcode used by Royal Mail Intelligent Mail barcode - The barcode used by the U.S. Postal Service POSTNET - The barcode used by the U.S. Postal Service until 2011 References Related websites U.S. Patent 5,602,382 – – Assigned to Canada Post Corporation "A Guide