Login to your web dashboard and go to
People > Guests
Search for the visitor you wish to block by name or email
Click on the visitor's name to show their profile
On the visitor's profile that holds their visitor history and other options, there is a menu in the header "Allow Sign-in."
Click the Allow Sign-in drop-down
Select BLOCK to block them for sign-in at your locations
When blocked visitors attempt to sign in, the kiosk will alert them that this is no longer possible and will alert the User, designated as the Compliance Officer, of the attempt.
Modifying the Blocked Sign-in Alert Message
Click on/Put your cursor over your profile icon and go to Settings
Click on Language
Click the edit icon (pencil) next to the Language that is set for your visitor management system
Click on Blocked Sign-in Alert
Modify the message
Scroll up and hit Save Changes