Format Of and Verify an ABN – Ouh a secret puzzle

Written by James McDonald

January 14, 2018

Just discovered it’s not just Credit Cards and Barcodes that have validity check digits and algorithms

FIrstly an ABN (Australian Business Number) is formatted

XX XXX XXX XXX e.g 84 008 812 322

The ABR website has the information on how to calculate the validity of an ABN

https://www.abr.business.gov.au/HelpAbnFormat.aspx

 

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