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What is a Postnet Barcode?

April 26, 2017barcode postnet

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What is a Postnet Barcode?

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In 1980 the Postal Service invented a unique bar-coding method called Postnet, an acronym for Postal Numeric Encoding Technique. The Postnet Barcode is a graphic method of encoding Zip + 4 information and is usually unique for each address. This information is used for sortation of letter and flat size mail. Every mailpiece in an automation rate mailing must bear a qualifying barcode.