Use Reply Paid for customer convenience

Reply Paid makes it easy - and free - for your customers to reply to your communications.

As well as the Priority delivery, Reply Paid offers the option of a Regular delivery service, taking up to an additional two business days for delivery.


  • Increase responses to your communications - when you enclose a Reply Paid envelope, your customers can respond quickly, easily and for free
  • Pay only for the articles that you receive

How to use Reply Paid

You can use our Reply Paid service for:

  • Reply Paid Letters (Domestic) - enclose a Reply Paid envelope, postcard, coupon or self-mailer in 'Large' or 'Small' items sent within Australia
  • International Reply Paid Letters (IRP) - extend your marketing campaign overseas and get the same benefits with for 'Small' items under 50g
  • If you need a reply paid service for larger items, you can use our Return Paid parcels service

We provide you with a Reply Paid address with barcode that can be pre-printed or handwritten onto envelopes. Customers then use this envelope to reply to you. You are charged only for the mail that is returned to this address - there is no charge to the customer.

What you can send

With Reply Paid, you can send 'Small' or 'Large' items

  Small Large
Maximum weight

Small125g (50g for IRP)


Minimum size

Small90 x 145mm


Maximum size

Small130 x 240mm

Large260 x 360mm

Maximum thickness



Get started!

To use our Reply Paid service, you'll need to complete a Reply Paid application form (PDF 115kB)

Send your completed form to Australia Post, Reply Paid Approvals Office, PO Box 1030 STRAWBERRY HILLS NSW 2012 or email it to Within 3 working days, we'll confirm our acceptance and send your Reply Paid approval and artwork.

Please note: You'll need an Australia Post business credit account to use this service.