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Fax Header

Fax Header: What's Included?

Fax Header

A fax header is the identifying line printed at the top of every page, showing who sent it, when, and how many pages follow.

Published on
September 9, 2026
Last updated on
September 24, 2026

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  • A fax header is the line of information automatically printed at the top of every page in a fax transmission.
  • It typically includes the sender's identification, the date and time sent, and the page number out of the total pages.
  • Fax.Plus's Custom Fax Header setting lets an account control exactly what identifying text appears at the top of outgoing faxes.

What Is a Fax Header?

A fax header is the line of text automatically printed across the top of every page in a fax transmission, showing who sent it and basic details about the transmission itself. It typically includes the sender's identification, the date and time the fax was sent, and the page number relative to the total page count, so a recipient can tell at a glance whether every page arrived. For a related look at what goes on the page before the header, see completing a fax cover sheet before it's sent.

What the Header's Sender Line Actually Is

The sender-identification portion of a fax header is what the T.30 fax standard calls the Transmitting Station ID, more commonly the Station ID line, and it works alongside a separate identifier for the receiving side. For the full breakdown of how those two identifiers differ, see the difference between CSID and TSID.

Setting a Fax Header on Fax.Plus

Fax.Plus's Custom Fax Header setting lets an account control exactly what identifying text, typically a business name and fax number, appears at the top of every outgoing facsimile. This is set once in the account's Faxing settings and then applies automatically to every fax sent from that account.

A Common Case: Confirming Every Page Arrived

A mid-size real estate company in Arizona faxes a multi-page closing document to a title company and needs to confirm every page made it through in order. The fax header printed on each page shows the page number against the total count, so a quick glance at the last page confirms nothing is missing.

FAQs

What information does a fax header include?

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A fax header typically includes the sender's identification, often a name or fax number, the date and time the fax was sent, and the page number out of the total pages. Exact formatting varies slightly by machine or service.

Is a fax header the same thing as a Station ID?

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Not quite. A fax header is the full line of information printed at the top of every page, including the date, time, and page count. The Station ID is specifically the sender-identification portion of that header, the part that identifies who sent the fax.

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