Security

Beyond the Black Bar: How to Redact a PDF for Real

Drawing a black box over text doesn't remove it. Learn the 'Paul Manafort' error and how to use structural redaction to stay safe.

James D., Legal Tech Consultant
2026-02-02
6 min read
Beyond the Black Bar: How to Redact a PDF for Real

The Danger of the "Fake" Redaction

Many people think that drawing a black box over text in a pdf, is enough to hide it. This is a dangerous mistake.

In 2019, a famous legal case (Paul Manafort) failed because lawyers use "fake" redaction. Reporters just copied the text under the black bars and pasted it into a new file. The secret words were still there!

Why "Black Bars" Fail

A PDF has many layers. When you draw a box, you are just adding a new layer on top. The original words are still in the code underneath.

The Right Way: Structural Redaction

To be safe, you must use a tool that removes the data from the file code.

How to Redact Safely:

  1. Use our PDF Redactor.
  2. Mark the text you want to hide.
  3. Click Redact & Save. Every page with a redaction is rebuilt as a flat image with the box burned in, and the original words are deleted from the file.
  4. Check the result with the PDF Redaction Checker.

The "Copy-Paste" Test

Always test your file. Try to select the area with your mouse. If you can't select any text, the redaction worked. For a full check, run the file through the PDF Redaction Checker, which lists any text that is still in the file but not visible on the page.

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