IMPORTANT:
To be able to sign a PDF document, it is necessary to have a digital certificate installed on your computer, such as T-CAT on card or T-CAT P. In the case of T-CAT on card, check if you have correctly configured your computer* for using the card and remember that you must have the card inserted in the reader.
Open the PDF with Adobe Acrobat (Reader or DC) and follow these steps:
1. Go to "Tools" or "All Tools" and select "Certificates" or "Use a Certificate":
If you can't find it, you can also search with the magnifying glass:
2. Select “Digitally Sign” and accept the dialog box
3. Select the space where you want to insert the signature, by dragging the mouse across the document.
4. Select below your T-CAT certificate with which you want to sign:
5. Finally, the signature will look like this:
According to current regulations, the holder's DNI must appear in the "Common name" field of certificates. If you want to hide it from the signature of a PDF, you can consult " How to hide the DNI from the T-CAT signature stamp in PDFs ?".
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