Use a captcha on your booking grid
Paid users have the choice as to whether they want to show a captcha to visitors who are trying to make a booking. A captcha simply ensures the person is a real human before they are able to submit the form.
By default the captcha is always enabled. Paid users can disable it by going to the Booking Form > Questions and setting CAPTCHA test to off.
Generally users will then see a simple checkbox that will verify that they are human. Some users may see a more advanced reCaptcha test that shows a series of pictures that they have to select. This is a reCaptcha issue, and it is based on your booker's environment.
According to Google, in some cases, the booker's environment doesn't have the features to support the checkbox reCAPTCHA widget due to:
- old browser(see the minimum browser requirements)
- some installed plugins conflicting with reCAPTCHA
- unstable network