Waivers are usually set up as Terms and Conditions: customers have to accept them to complete the booking process. For detailed information, please click here to see our tutorial.
If customers book online and they are required to agree to your Terms and Conditions, when you print a booking from your Bookeo Calendar, the printout will include the sentence The customer has agreed to the terms and conditions.
If you want to use online waivers, you can add a link to the online waiver form in the booking confirmation email, as you can see in our tutorial here.