How to add a watermark to a PDF that is permanent
How to add a PDF watermark that is permanent (non-removable) using Safeguard PDF Security. When you add a watermark using MS Office (Word, Excel, Powerpoint, etc.) or a PDF editor, those watermarks can be easily removed. Safeguard stops your watermarks from being easily removed since protected PDF files cannot be opened in an editor application.
Locklizard provides the best watermarks for documents. Add watermarks to PDF documents for security, insert different view and print watermarks, watermark documents with recipient name and other dynamic variables (added on-the-fly), and prevent watermarks from being removed.
https://www.locklizard.com/pdf-waterm...