abn
n. C1 Advanced abn
n. Stands for Australian Business Number. A unique nine-digit number that identifies a business in Australia. It is required for most official business activities.
n. Abbreviation for Australian Business Number. A nine-digit identifier issued by the Australian government to legal entities and sole traders for tax and business registration purposes.
You must include your ABN on every invoice.
The accountant reminded the small business owner to register for an ABN before starting to sell goods online.
Failure to display a valid ABN on a commercial invoice can result in the recipient being unable to claim a tax deduction for the purchase.