Using reCAPTCHA in your Signup Forms
Google provides a free service called reCAPTCHA, Completely Automated Public Turing test to tell Computers and Humans Apart. reCAPTCHA helps protect your website against spam, abuse and can identify the difference between computers and humans. You can use this feature to protect your Signup Form from being abused by Spammers. Before getting started with reCaptcha, please note that as of September 2018, many Google services were blocked in Mainland China.
Signup Forms August 16, 2019