To enable the Captcha for Login/register form, go to Settings > Advanced Settings > Captcha
1. ReCaptcha Config: tick on the box to allow Enable ReCaptcha feature
and input the Captcha API, Learn how to get an api key
After enabling the correct key, the default contact form will be enabled with the ReCaptcha form to prevent spam.
2. Turn on ReCaptcha for Login / Register form / Enquiry form
For Login/Register form: Go to Settings > User Settings > Google ReCaptcha Options
Tick to the form you need to enable ReCaptcha: Login form or Register form:
For Enquiry form: Go to Settings > Enquiry Settings > Enable re-captcha at enquiry form