# PDF Stamp / Watermark

> To add an extra layer of protection to your PDF files, you can automatically stamp (or watermark) them.

Source: https://tentary.com/en/help/pdf-stamp/
Last updated: 2025-10-09

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To add an extra layer of protection to your PDF files, you can automatically stamp (or watermark) them. A stamp makes it more difficult for buyers to share your files.

## What is a PDF stamp?

A PDF stamp is a security measure that prevents illegal sharing of the PDFs that you sell. Through this process, called stamping, each page of your PDF file(s) is stamped with the buyer's name and e-mail address.

## How stamps work at Tentary

- Stamps are inserted on every page
- Stamps are inserted centered at the bottom of the page
- Stamps consist of the buyer's name and e-mail address.

Please also note the [information listed below](#notes).

Example:

![file-lZbe1vU93T.png](https://tentary.com/help/en/pdf-stamp/01.webp)

## Activate PDF Stamp

You can add a stamp to any of your files available for purchase. Just follow these steps:

1. Create a new product
2. Upload a pdf file
3. In the product settings, enable the option **Enable stamps/watermarks for PDFs**.
4. Save your product

![file-KgdSF3RL7m.png](https://tentary.com/help/en/pdf-stamp/02.webp)

From now on, on each page of the PDF files offered with the product, the name and e-mail address of the buyer will be inserted before downloading.

## Notes

A stamp can only be applied to

- PDF files
- files smaller 1000 MB
- files that are not password protected
- files that are not read-only

If multiple files are sold with one product (e.g. a few PDFs and a video), the stamp will only be applied to the PDFs.