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Blank fax pages usually mean the original went in upside down or face down, so the scanner read the empty side. Check the feeder orientation, resend a test page, and confirm with the recipient before resending the full document.
| Symptom | Most likely cause | Quick check |
|---|---|---|
| Every page blank | Pages loaded face down or upside down | Reload one page the other way and send a test page |
| Some pages blank, some fine | Blank sheets mixed into the stack, or double-sided pages | Flip through the stack and mark which side holds print |
| Blank with a faint line or edge mark | Scanner glass dirty, or a page edge caught in the feeder | Clean the glass and straighten the stack before resending |
| Blank on one machine only | That machine's scanner or feeder fault | Try the same pages on a different machine or service |
A fax machine scans only one side of each sheet as it feeds. If you load the stack face down on a machine that expects face up, it scans the backs, which are empty, and faithfully sends perfect copies of nothing. Upside-down loading is a subtler version: the content is there, but the receiver may still see it as blank if the page is also reversed or if the scanner reads a blank reverse side. This is the single most common blank-fax cause, and it is also the easiest to miss, because the sender's machine reports a successful send. The confirmation counts pages, not ink.
Double-sided originals cause a related trap. A standard fax sends one side per sheet. If your document prints on both sides, the reverse sides never transmit unless you fax each side as its own page. People often discover this when page two of a form arrives blank: page two was the back of page one. Photocopy double-sided originals onto single sides first, or scan and reorder them, before faxing.
A dirty scanner glass or a worn feeder roller can leave pale streaks or a fully washed-out page, especially with light pencil, faint print, or a low-contrast photocopy. Very light originals sometimes fall below the scanner's threshold, so the machine treats light grey text as white paper. If your original is a faint carbon copy or a pale printout, make a darker photocopy first and fax that instead. Similarly, a page fed at an angle can slip partly past the scanner, leaving a blank strip or a page that looks empty except for one edge.
Blank pages can also hide inside the stack itself. Separator sheets, instruction sheets you meant to remove, and the blank back of a cover page all transmit as blank pages. When a recipient reports "three blank pages in the middle," check whether those correspond to sheets you never meant to send. Removing them before a resend saves the recipient confusion and saves you pages on the next quote.
Blank and all-black pages point to opposite faults. Blank pages usually mean the scanner saw no print: wrong orientation, a blank sheet, or print too faint to register. All-black pages usually mean the scanner saw too much: a lid left open on a flatbed scan, a stuck sensor, or a page fed with a dark backing sheet. Telling the recipient which one you got matters, because the fix is different. If you report "blank," the sender checks orientation. If you report "black," the sender checks the lid and the scanner. A one-line description of what actually printed saves a round of guessing.
When you fax through an online service or through LetterAgent, orientation errors of this kind mostly disappear, because you send a file rather than feeding paper. LetterAgent fax is available in testing for US and Canadian numbers, with a per-fax quote and a page count verified before you approve the total. If a file-based fax still arrives blank, the file itself is the place to look: check that the pages are not blank in the file, that scanned images are not reversed, and that no blank separator pages sit between content pages.
Suspect the receiver when the same document sends cleanly to one number but blank to another, or when every sender's faxes arrive blank at that number. A failing scanner lamp, a dirty sensor, or a machine set to an unusual contrast mode can wash out incoming pages. In that case, no resend from your side will fix it, and the recipient needs to test their machine or have it serviced. A short call beats three more blank sends: ask whether other people's faxes also arrive blank, and whether a test page from another sender reads normally.
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