Digital Signatures in Access Requests

Hi GRC experts,

I have googled and found very little on the topic of using Digital Signatures (E-signatures) as sign-off within GRC.

The question has been raised as a business requirement and my assumption is that this would be a development of the Access Request. I know very little about customisation of this and welcome any ideas whether theoretical or based on practical experience.

I can see that I can add an attachment but this would be an image of the digital signature not an actual signing as approval of the Access Request.

Thanks very much,