DrawImage ( signatureImage, 0, 0 ) //Saves and closes the document document. Reason = 'I am author of this document.' //Draws the signature image graphics. LocationInfo = 'Honolulu, Hawaii' signature. Bounds = new RectangleF ( new PointF ( 0, 0 ), signatureImage.

Graphics //Creates a certificate instance from PFX file with private key PdfCertificate pdfCert = new PdfCertificate (, 'password123' ) //Creates a digital signature PdfSignature signature = new PdfSignature ( document, page, pdfCert, 'Signature' ) //Sets an image for signature field PdfBitmap signatureImage = new PdfBitmap ( ) //Sets signature information signature. Add () //Create PDF graphics for the page PdfGraphics graphics = page. And you can always search the SE for more possible ways of placing images on/behind other content ( ).//Creates a new PDF document PdfDocument document = new PdfDocument () //Adds a new page PdfPageBase page = document. There are several ways: using the package background will work, as described at How to include image in backgroundīut other answers there might also be useful. Else, you will need to includepdf/ includegraphics the unsigned version of the page and manage to insert the signature in the right place.If the signed page was first generated with LaTeX, use the same code to produce it inside your main, merged document, but now placing the includegraphics with the signature in the right place.Open your signed page with inkscape and ungroup it to just keep the signature area (which will be kept as vectorial object).If this is not required but you want to keep the searchability and copy/pastability in your final result (without the after-latex step of performing OCR), even in the signature text, you can proceed as follows: I am still looking for the method to do this without loosing the validity of the signature other way than using Adobe Acrobat Pro.

How to insert signature in pdf