The faxed document
Fax header
The fax header is the line printed at the top of every page sent, showing the date, time, sender's identity and page number.
It is added by the sending machine at the time of sending, from the date, name and number settings its owner entered. It is therefore part of the transmitted image: the recipient receives it with the page. Some receiving machines add their own reception line at the bottom of the page.
Why it matters for fax
The header is useful for filing a page and matching it to its transmission, but it is no proof: a wrongly set clock or a made-up name appear just as readily as accurate details. It complements the transmission report; it does not replace it.