Australian business number: eleven digits written in groups of two then three, three, three. The spacing is required here, since eleven bare digits are also the Italian VAT number and the Polish PESEL.
Label: AU_ABN
(?<!\d)\d{2}\s\d{3}\s\d{3}\s\d{3}(?!\d)ABN 51 824 753 556 on the invoice. → 51 824 753 556Supplier 12 345 678 901 registered. → 12 345 678 901ABN 51824753556ABN 51 824 753Tags: au, business, accounting