When Paper Is the Only Thing the Recipient Will Take
unofax exists because some organisations still insist on a fax. Clinics, courts, councils and government agencies keep a fax number long after everyone else moved on, and if that is the only channel on offer, you need a way to use it without owning a machine.
The opposite problem turns up just as often. A tribunal wants the form posted, not emailed. A landlord wants a notice delivered to an address. An insurer will take a complaint on paper and nothing else. In those cases a fax does not help, and neither does a PDF attachment. Something has to be printed, folded into an envelope and handed to a postal carrier.
That is what unopost does. It is our sister service, built by the same team on the same infrastructure as unofax: you upload a document, type an Australian address, pay once, and a printed letter goes into the Australia Post network. No printer, no envelope, no stamps, no trip to the post office, no account and no subscription.
How It Works
The flow is deliberately the same shape as sending a fax on unofax. Four steps, one page, no signup.
- Upload the document. PDF, Word, JPG or PNG, up to 50 pages and 50 MB. Word files are converted to PDF automatically, the same conversion unofax uses for Word documents.
- Enter the addresses. An Australian delivery address, checked down to whether the postcode really belongs to the state you picked, plus a return address that can be in any country.
- Check the preview. Your pages are laid out on A4 exactly as they will be printed, before you pay. Colour pages stay in colour at no extra charge.
- Pay by card. One Square checkout, one price set by the page count. The letter is printed, put in an envelope and lodged with Australia Post.
What It Costs
Two services, one flat price each, with everything included. Prices are in Australian dollars with GST.
| What you get | Price |
|---|---|
| Express Post letter, up to 12 pages, flat A4 envelope | $20.00 |
| Regular post letter, up to 12 pages, flat A4 envelope | $10.00 |
| Each page after the first 12 | $0.50 |
| Colour printing where the document has colour | Included |
| Australia Post tracking on every letter | Free |
| Double-sided printing, to save paper | Free |
| Folded to fit a letterbox, up to 10 pages | Free |
| Signature on delivery, Express Post only | Free |
For scale: Australia Post charged $11.60 for its prepaid Express Post envelope that fits A4 flat in July 2026, and that is before you have printed anything. The $20 covers the printing, the envelope, the postage and the tracking together.
Statutory declarations are always printed single-sided, even if double-sided is ticked, because the agencies that receive them usually reject a duplex copy.
Same Day, If You Pay by 2:30pm
Pay before 2:30pm Sydney time on a business day and the letter is printed and lodged that day. After the cutoff, or on a weekend, it goes out the next business day.
From there it is Australia Post. Express Post usually arrives the next business day inside its delivery network, and regular letters usually take three to seven business days. Those are Australia Post estimates rather than guarantees: once a letter is lodged, the timing belongs to the carrier. If you are working to a deadline, pay for Express Post and add signature on delivery, which costs nothing.
Fax or Post?
If the recipient accepts both, the choice comes down to speed, cost and what kind of record you need afterwards.
| unofax | unopost | |
|---|---|---|
| Arrives in | Minutes | Next business day by Express Post, 3 to 7 by regular post |
| Cost of 5 pages | $1.95 AUD, at $0.39 a page | $10 by regular post, $20 by Express Post |
| Where it goes | 45 countries | Australian addresses, from anywhere in the world |
| Record of sending | Transmission result per page | Australia Post tracking, and a signature on request |
| What the recipient gets | A black and white page out of their fax machine | A printed document, in colour, in an envelope |
| Good for | Clinics, IRS and ATO forms, anything with a fax number | Tribunals, councils, landlords, anyone who wants paper |
The short version: a fax is faster and much cheaper per page, but it arrives as a fax, which means grayscale and whatever the receiving machine makes of your layout. A posted letter takes days and costs more, but it arrives as the document you uploaded, in colour, with a tracking number attached to it. For an argument about why the fax side of that table has not disappeared yet, see our post on why businesses still use fax.
Posting to Australia from Overseas
This is the case unopost handles better than anything else we know of. If you live abroad and need something to reach an Australian address, the usual route is international mail: expensive, slow and impossible to track properly at the receiving end.
unopost prints in Australia, so your letter enters the postal system as a domestic letter. Upload from Berlin, Tokyo or Toronto, pay the same $10 or $20, and it is delivered on Australia Post timelines rather than international ones. The return address on the envelope can stay your overseas address, so undeliverable mail still comes back to you. It is the same logic behind sending international faxes online: put the document into the destination country as early as possible and skip the border entirely.
What People Post
The pattern is documents that only count on paper:
- Bond and tenancy disputes. Notices to a landlord, tenant or agent, with free signature on delivery as a record.
- Letters to council. Objections, complaints and applications that have to arrive in writing.
- Government forms. Anything an agency will not accept by email.
- Contracts and legal letters. Letters of demand and notices, posted flat so nothing arrives creased. Our guide to faxing legal documents covers the same material for the fax side.
- Complaints to a business, insurer or bank. Tracking shows when you sent it, which is usually the disputed part.
What it is not for is marketing. unopost posts letters and documents, not unsolicited advertising in bulk.
Printed, Posted, Then Deleted
Your document is encrypted in transit to unopost and on to the print partner. The moment the letter is lodged with Australia Post, every copy is deleted, including the print-ready one. Unpaid or unpostable letters are deleted after 14 days.
The practical consequence worth knowing in advance: nothing is kept while the letter is in the post, so a letter cannot be reprinted after it is sent. What survives is the receipt data, meaning the address, the page count and the price. This matches how unofax treats documents, described in our notes on payment and document security.
Letters from Code, Paid in USDC
unopost carries the same x402 API that unofax does, so an app or an AI agent can post a physical letter with no account and no API key, paying in USDC on Base. The prices match the card prices: 20 USDC by Express Post, 10 USDC by regular post, 0.50 USDC for each page past 12. Businesses posting in bulk can get their own rates, advertised from 2 USDC a letter.
If you have not come across the protocol, our post on how unofax supports x402 explains the 402 handshake in full. The shape is identical here, except that what comes out the other end is a letter in a letterbox rather than a page in a fax tray.
The Bottom Line
unofax and unopost solve the same problem from opposite ends: getting a document to someone who will not take an email. If the recipient has a fax number, send a fax from unofax.com at $0.39 AUD a page and it lands in minutes. If they want paper in an envelope at an Australian address, upload it to unopost.com.au and it goes in the post today.