Fax Once / Guide

What a fax confirmation shows, and what it doesn't

Updated October 31, 2026

A fax confirmation shows that a machine at that number answered and took your pages at a certain time. It doesn't show that a person read them or that the right person got them.

What's on a confirmation

Most confirmations show the number dialed, the date and time, the page count and the result. A Fax Once receipt shows those four things. It never stores your pages.

What it can and can't show

When a deadline matters

• Save a copy of what you sent. A receipt shows that a fax went through, not what was on it. Fax Once removes the pages from your iPhone once the fax is delivered, so save your own copy first.
• Save the receipt with that copy. Keep them together in one folder.
• Don't wait until the last hour. Lines can be busy, and fax machines run out of paper. Leave time to try again.
• Call to check. Ask the office to confirm that they have it, and write down the name, date and time.
• Check that fax is accepted. Some deadlines require another way of sending. Your notice, contract or court rules will say.

Whether a confirmation counts as legal proof depends on who you are dealing with and where. If a lot depends on it, ask a lawyer or the office that set the deadline.

Why a fax might show as failed

• Busy line. Fax Once tries again on its own, 3 tries in all.
• No answer. The machine may be off or out of paper.
• Not a fax line. A person or voicemail answered. Call the office to confirm the number.
• The call dropped. A poor line can cut off a long fax partway through.

In Fax Once, a failed fax gives your credit back and keeps your pages on your iPhone so you can try again.