This plugin is fully compliant with the General Data Protection Regulation (GDPR).
In particular, before being added to a waiting list, the user must have the choice to thick a checkbox with a link to the Privacy Policy.
To enable this checkbox, just go to YITH > Waiting List > Settings and activate the option Enable Privacy checkbox.
When enabled, you will also be able to see a text box, where you can add your custom text to show next to the checkbox. You can also include the shortcode [terms] and [privacy_policy].
Here is an example of how the checkbox appears, right next to the Add to waiting list button.
Moreover, if the customer clicks on the Add to waiting list button, without enabling the checkbox, they will get an error that invites them to tick the Privacy Policy box.
If you want to enable this checkbox also for logged-in users, you can do that by enabling the Double opt-in option for logged-in users. Please, refer to this page for more details.