CAPTCHA stands for the Completely Automated Public Turing test to tell Computers and Humans Apart. CAPTCHAs are tools you can use to differentiate between real users and automated users, such as bots. (For more information please read https://www.imperva.com/learn/application-security/what-is-captcha/)
See if CAPTCHA is enabled on your site
Member Splash uses this service when our clients become overwhelmed with 'junk' entries to their forms. Typically we see this on "contact us" forms or "wait list" list forms.
To see if your site is already configured for CAPTCHA, Go to your form and try to add CAPTCHA (see instructions Adding CAPTCHA). If you get the message below your site has NOT been configured to use this service. Contact our Support Center and we will configured it for you. Once configured it will work on any form that you add it to.