IMPORTANT:
To be able to sign a PDF document, you need to have a digital certificate installed on your computer, such as the idCAT Certificat. Remember that the idCAT Mòbil is not a digital certificate.
With the idCAT certificate installed on your computer, open the PDF with Adobe Acrobat (Reader or DC) and follow the following 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 using 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 idCAT certificate with which you want to sign:
5. Finally, the signature will look like this:
According to regulations, the CommonName field of the idCAT certificate must contain both the full name and the DNI. However, if you want to hide the DNI , you can do so as follows:
If you want to hide the DNI when signing a PDF, you must also hide the name and surname, as they are included in the same CN field (Name, Surname and NIF). Likewise, the CN field can always be seen by consulting the properties of the document's signature.
To hide the CN field, follow these steps:
- Go to the “All Tools” section and select “Use a Certificate”:
- Make a box where you want to sign.
- Choose the certificate you want to sign with and click “Continue”.
- A screen appears showing how the signature to be created will be displayed. At this point, click “Create” to generate a new signature appearance.
- Then, mark the signature appearance as “None” (this is only a recommendation for a better visualization of the signature) and uncheck the box that says “Name ”, so that we will uncheck the CommonName field where the DNI appears.
- When you save the signature, it will look like the one below:
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