Printer adding random marks? Check it before signing

You print a contract and find stray dots, smudges, lines, or blotches across the page. Before anyone signs, find out whether the marks come from the printer, the paper, or the document itself.

A useful first check is to print a separate pattern with the Printer Test Page. It includes color blocks, gray steps, lines, and text. If the same kind of marks appear on that page, the contract file is less likely to be the cause.

Print a separate test page

1. Open the Printer Test Page and use your browser's print option to print the pattern. Do not use a contract page for this check.
2. Use plain, clean paper that matches the printer's settings. Check that the paper is loaded straight and the guides are snug, not pressing hard against it.
3. Look at the whole sheet in good light. Note whether marks are dots, streaks, smears, repeated spots, or lines, and whether they appear on one side or across the page.
4. If you see marks, print one more test page on a fresh sheet. Compare where the marks appear. If the test page looks clean, print one draft copy of the contract and compare that too.

Keep the test sheets separate from the signing copies. The test checks what comes through the browser and printer driver, so it can help narrow down the source, but it cannot identify a specific damaged printer part by itself.

What the result means

The test page has the same kind of marks

The problem is probably in the paper path, printer supplies, or print settings rather than the contract wording. If you can, try a second sheet of fresh paper. Marks in the same position on both sheets point to the printer or its supplies. Marks in different places may come from loose debris, a dirty roller, or paper dust.

The test page is clean, but the contract draft is not

The printer can produce a clean page, so check the contract file, the program you printed from, and the selected print settings. A mark visible on screen may be part of the document. A mark that appears only on paper can come from a rendering or driver issue, or from a print option such as comments or markup.

Marks repeat at regular intervals

A repeated spot or line at similar distances down the page can suggest a roller, drum, or other rotating part, especially on a laser printer. On an inkjet, bands or missing lines can instead point to a printhead or ink flow issue. These patterns are clues, not proof of a particular part failure.

The test page is clean once, but later pages are marked

The fault may be intermittent. Paper dust, a small scrap, a shifting cartridge, or a warm printer part can affect some pages but not others. Print a few draft pages only if needed, and inspect each one before using the printer for signing copies.

How to fix it

1. Check the paper. Remove bent, damp, curled, or dusty sheets and try fresh paper from a sealed ream. Confirm that the paper type selected in the print dialog matches what is loaded.
2. Look for loose debris. Turn the printer off and follow its manual to check areas the user can safely access. Remove loose paper scraps or dust gently. Do not touch a laser printer's hot fuser, and do not force open covers or parts.
3. Check the supplies. Make sure ink cartridges or toner are seated correctly and that any protective tape has been removed from a recently replaced cartridge. If a cartridge leaks, looks damaged, or leaves toner or ink on the paper, stop using it and follow the printer maker's replacement guidance.
4. Run the printer's built-in cleaning or alignment routine. Inkjet printers may offer printhead cleaning or nozzle checks; laser printers may offer supply or calibration checks. Find these in the printer's own menu or utility, and follow its instructions. Avoid repeated cleaning cycles, which can use a lot of ink.
5. Check print options. On Windows 11, open Settings › Bluetooth & devices › Printers & scanners, select your printer, and review its printing preferences or queue. On macOS, open System Settings › Printers & Scanners, select the printer, and check its options in the print dialog. Turn off comments, markup, or draft effects if they are not wanted, and print another draft.
6. Restart and compare. Cancel stuck jobs, turn the printer off briefly, then restart it and print the test pattern again. If the test pattern is clean but the contract still prints with marks, try printing the draft from another program or device.

When to use another printer

If marks continue on multiple fresh sheets, including the Printer Test Page, do not use that printer for the signing copies. A visible streak or blotch can obscure a name, date, signature line, or clause. Print the contract on another known-good printer and inspect every page before signing.

If the printer is under warranty, save a marked test sheet and contact the manufacturer or seller. For an older printer, repeated smears or lines after the recommended cleaning steps may need a new cartridge, drum, or repair. Avoid opening sealed sections or trying to clean parts that the manual says are not user-serviceable.

Check the final copies one page at a time

After the printer produces a clean test page, print one contract draft and inspect it before making the full set. Confirm that all pages are present, text is readable, and no marks cross the signing areas. If anything changes during a longer print job, stop and check the next page before continuing.