At certain times it is necessary to add a stamp or unique mark to a PDF document to identify it as if it were a watermark. For this aim PDF Image Stamp has been created. It is a plug-in to add to Adobe Acrobat (version 5.0 or later) which lets you put your own stamps on any page of a PDF document.
The stamp is created by you, and you can add any logo, text, graphic, etc. These stamps have to be in any of these graphic formats: JPG, GIF, BMP or PNG.
Once you have designed the stamp, PDF Image Stamp lets you put it in any position in the PDF, including resizing it so it fits better.