To be able to sign a PDF document, it is necessary to have a digital certificate installed on your computer, such as the 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 the 'use of 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":

marked selection to use the certificate

If you can't find it, you can also search with the magnifying glass:

search in the magnifying glass use the certificate

2. Select “Sign digitally” and accept the dialog box

select the digitally sign option and accept

3. Select the space where you want to insert the signature, dragging the mouse around the document.

drag the mouse to select the signature space

4. Select below your T-CAT certificate with which you want to sign:


5. Finally, the signature will look like this:

digital signature on a pdf document

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