How to sign a PDF on iPhone and fax it

Get the PDF into the Files app

Signing is easiest from the Files app. If the PDF came by email, open the attachment, tap the share icon and choose Save to Files. If it came as a paper form, scan it with the Notes or Files scanner first and save it as a PDF. Give the file a clear name, such as Lease renewal signed, so you can find the right version later.

If the PDF is protected and Markup will not open it for editing, ask the sender for an unlocked copy. Printing it to a new PDF may also work, but check that all the pages and fields survive.

Check the signature will survive the fax

• Use black ink in Markup; light colors fade on a fax
• Make the signature large enough to read, but keep it inside the line
• Zoom in to check the signature did not land on top of printed text
• Confirm every signature and initial box is filled before sending
• Check whether the recipient accepts electronic signatures; some forms require a wet signature on paper

Fax the signed PDF

faxappsforiphone.com recommends FaxToFax.com, which works in Safari. It does not have its own e-signature tool, which is why you sign with Markup first.

1. In Safari, open FaxToFax.com and sign in with your email and one-time code.
2. Start a new fax and attach the signed PDF from Files.
3. Add a cover page naming the form and the number of pages.
4. Enter the fax number, confirm it, and send.
5. Keep the time-stamped delivery receipt as proof the signed form arrived.