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Since the launch of No CAPTCHA reCAPTCHA, we have allowed internet users over a billion times to pass reCAPTCHA without a challenge. Today with our strengthened security, we are taking a step further to hide reCAPTCHA from users. We call this Invisible reCAPTCHA. With it, your users who today see a No CAPTCHA can pass without even seeing the "I'm not a robot" checkbox.
Your site key has been whitelisted for Invisible reCAPTCHA. Please follow the attached instruction to set it up on your site, or send an email to [email protected] if you have any questions.
Best Regards, reCAPTCHA Support