How to Find Out Who Leaked Your PDF

You send a report, a contract, or a paid document to a group of people. One of them shares it where it shouldn't go. If every copy was identical, you have no way to know who did it. All the copies look the same.

Why identical copies can't be traced

A leak investigation needs something that tells one copy from another. If you sent the exact same file to everyone, there is nothing to compare. A visible "Confidential" stamp doesn't help either — it's the same on every copy, and easy to crop out.

How per-recipient marking works

The fix is to give each copy its own hidden mark tied to one recipient. Each person gets a file that looks normal but carries a quiet, unique signature. If a copy leaks, you compare it to your records and the mark points to the source. Because the mark is spread through the file, cropping or a screenshot won't simply remove it.

Mark each copy before you send

Orilami's PDF Recipient Watermarker adds a unique, layered mark to a PDF for each recipient, so any shared or leaked copy can be traced back to its source. It builds the whole batch in your browser, so the document itself is never uploaded.

Who needs this

This is built for people who share sensitive files with named recipients: law firms, finance and deal teams, publishers sending review copies, and course creators selling paid PDFs. When a file leaks, knowing the source is the difference between a guess and an answer.

Don't send one file to many people. Send many files that each quietly say who they went to.