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Old 12-07-2006, 03:09 PM   #1
Jon Finch
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Default Royal Mail Reference Numbers

A bit of a UK centric question, but if anyone round the globe can help, feel free!

Royal Mail Recorded/Special Delivery letters contain a thirteen digit references in the form AA xxxx yyyy zGB where AA is any two letters, xxxx and yyyy are four digit numbers, z is a single number and GB is always GB. I'm pretty sure that z is a check digit calculated from the rest of the reference but can't find out how its done.

Anyone know?

   
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