The Flipcause Registration Tool has a built-in waiver functionality.
To add a waiver, go into the Campaign Editor > Manage Registration > Edit the Registration Group you want to add the waiver to > scroll down to the bottom where you see "Waiver Options."
Once here, toggle Waiver to Yes and type or copy and paste your plain text waiver into the box. You'll want to indicate whether to apply this waiver just to the Registrant (or purchaser) or to just the Individual Participants (ticket holders). Once finished, click Publish Registration Group.
The published version of the waiver entered in the example above will look like this:
It will require a typed signature, birth date, and for the person filling the waiver area out to confirm they are 18 years old or more.