To add a digital certificate to a PDF signature in Adobe Acrobat, you'll need to follow the next steps.
- Open Adobe Acrobat
- Upload your PDF
- Go to Tools
- Scroll down to Forms and Certificates
- Select “Open”, under “Certificates”
- Select “Digitally Sign” on the top bar
- Click Configure New Digital ID.
- Fill in the relevant data
- When you’re done, click Sign → Apply the signature
That's it. Now your signature comes with a digital certificate!