- Login to Backhouse 
- Click on Bookings > Basic Settings 
 You shall find the button for Block patrons from booking online
- After you tick this button on and hit Save, on your App, when checking a customer's profile, you will see the button of Authorize patron to book online 
- If you tick this option off, the customer won't be able to make online booking anymore. 
- When manually creating a booking, the staff on-site can easily spot the customer are being blacklisted by that little [x] icon as well. 



