1. Can your JAVA product add watermark stamp to a PDF, TIFFS, Word documents ?
2. What kind of license is required for all of the above?
1. Yes you can use Aspose.Pdf, Aspose.Imaging and Aspose.Words to add watermarks to PDF, TIFF and Word documents respectively. Please check the following topics for more details.
2. As three of Aspose APIs will be required to accomplish your requirements, so it is recommended to go for Aspose.Total for Java license.