Using Australia Post Barcodes allows Australia Post to efficiently process your mail. It’s cheaper for them and they give you cheaper postal rates in return. To use Australia Post Barcodes, you will need to have Australia Post approved addressing software such Hopewiser or QAS configured with thankQ,
The barcode information needs to appear on the Envelope or Label. If using Window Envelopes, then include the barcode on the letter and make sure it is clearly displayed in the window envelope.