You can add a Data protection officer to your Yousign account. This means they will receive any communication regarding data privacy.
To add their contact details:
Click on your initials at the bottom left of the page.
Click on "Settings".
Click on "General settings".
Enter the email-address of the person you wish to be the data protection officer.
Click on "Save".
If you do not have a dedicated contact listed, all information regarding data privacy will be transmitted to account owner.