I found that it is possible to add a digital signature to a word-document and save it as a pdf using Aspose.Words. (source: http://www.aspose.com/documentation/.net-components/aspose.words-for-.net/create-digitally-signed-pdf-documents.html)
Then I get a pdf with a digital signature, but is it possible to add another signature afterwords to that pdf?
And should I then use Aspose.Words or Aspose.PDF?
Thanks for your request. Aspose.Words does not work with PDF documents; it works only with MS Word documents. So please ask your question regarding PDF in the Aspose.PDF.Kit or Aspose.Pdf forums: