How to Fix Unreadable Envelope Fonts When Printing Word Mail Merge
Question details
The user is experiencing an issue where fonts on envelopes created through a mail merge print incorrectly or appear unreadable on an HP printer.

- Product
- Microsoft Word
- Device & OS
- not provided
- Scenario
- Printing a batch of envelopes using the Mail Merge feature.
- Observed behavior
- The text on the printed envelopes has unreadable, corrupted, or incorrect fonts, despite appearing normal on the computer screen.
Before altering your printer settings, try printing a standard text document to determine if the unreadable font issue affects all print jobs or is strictly isolated to mail merge envelopes.
Test with a Standard Font to Isolate the Issue
Switching to a universally supported font helps determine if the printer is struggling to process and render a custom or complex font used in the envelope.
Some printers, particularly when processing complex mail merge data, may fail to render custom or downloaded fonts correctly, resulting in unreadable characters.
Open your mail merge document in Microsoft Word. Highlight the address blocks and any other text on the envelope.
Navigate to the 'Home' tab and change the font to a standard, basic font such as Arial, Calibri, or Times New Roman.
Go to 'File' > 'Print' and print a single test envelope to see if the standard font renders correctly on the paper.

Reinstall and Update the Printer Driver
Updating to the latest printer driver ensures that your computer communicates correctly with the printer, preventing font substitution and corruption errors.
Create and Print Mail Merge Envelopes Seamlessly with WPS Writer
If printer driver conflicts in Microsoft Word persist, you can effortlessly manage and print your mail merge envelopes using WPS Writer. WPS Office offers stable font rendering and an intuitive mail merge wizard that prevents formatting errors.
- 1. Open WPS Writer: Launch WPS Writer and open your envelope template, or create a new blank document.
- 2. Access the Mail Merge tab: Navigate to the 'Mailings' tab on the top ribbon and click 'Open Data Source' to link your spreadsheet of addresses.
- 3. Insert Merge Fields: Click 'Insert Merge Field' to place the delivery addresses precisely where you want them on the envelope layout.
- 4. Merge and Print: Click 'Merge to Printer' to send the accurately rendered envelopes directly to your HP printer.

Frequently Asked Questions
Why do my fonts change or look like symbols when I print a Word document?
This usually occurs due to a communication error between Word and your printer driver. The printer may substitute a font it cannot process with generic symbols. Updating your printer driver or sticking to standard TrueType fonts usually resolves this.
How do I know if my printer driver is causing the mail merge issue?
You can isolate a driver issue by printing a standard, non-mail-merge document. If standard documents print correctly but mail merge envelopes do not, the issue might be related to how the application handles merge data. If all prints have unreadable fonts, it is almost certainly a printer driver issue.
Can I save my mail merge envelopes as a PDF before printing to avoid font errors?
Yes. After completing your mail merge, choose 'Merge to New Document'. Then, go to File > Export to PDF. Saving your output as a PDF locks in the fonts and layout. You can then print the PDF, which often bypasses application-specific printer driver glitches.




