To prove a fax was delivered, keep the transmission report: it shows the number dialled, the time, the page count and that the receiving machine confirmed every page. FaxUp shows a Delivered status and can email that report as a PDF.
When the deadline matters (a tax authorization, an insurance appeal, a signed contract) you want more than "I think it went through". A fax gives you something email doesn't: the receiving machine confirms what it got, and you can keep a record of it.
How a fax confirms itself
Fax machines follow the ITU-T T.30 procedure. After each page, the receiving side sends back a message saying the page arrived correctly, or asking for it again. At the end of the call, the carrier knows whether every page was confirmed. That is what a "delivered" status means: not that someone read it, but that the machine on the other end accepted all the pages.
What FaxUp gives you
- Live status. In the app and under "Your faxes" on faxup.net/send, each fax moves from Sending to Delivered, or to Failed after its retries.
- A notification on your phone when the fax is delivered.
- A transmission report PDF by email, if email notifications are turned on in the app. The email says "Your fax was delivered" and carries a one-page report.
The report lists:
| Line | What it shows |
|---|---|
| Status | Delivered |
| To | The fax number dialled, with country code |
| Pages | Pages transmitted, including the cover page |
| Subject | The subject you gave, if any |
| Time | When delivery was confirmed, in UTC |
| Transmission reference | The carrier's ID for this fax |
It ends with a note that the receiving fax machine acknowledged the transmission. It is a PDF, so you can save it in Files, print it, or forward it to whoever needs proof.
Turn on the email report
- Open the FaxUp app on your iPhone or Android phone.
- In the app's settings, turn on email notifications and enter the address the reports should go to.
- Sign in with the same email on faxup.net if you also send from the web, so both share one account.
When the office says it never arrived
- Check the report's number against the number they gave you. A delivered fax to a wrong but working fax line still says "Delivered".
- Send them the report with the time and page count; it can help them find the pages in a shared inbox or a digital fax system.
- Resend with a cover page marked with their reference number and "Resent, originally sent on [date]". The cover sheet maker does this in a minute.
- Keep both reports. If there is a dispute about a deadline, two delivered reports are better than one.
Keep the right things
For anything official, keep three things together: the document exactly as sent (save the PDF), the transmission report, and any letter or form that gave you the fax number. Then the question "did you send it, to where, and when?" has a one-file answer.