The new Google Invisible reCaptcha - invisible or not?

Question

Google announced Invisible ReCAPTCHA is coming soon. For now, if you want to integrate the new reCAPTCHA to your site or app you can register here.

I do have 2 site keys whitelisted for the new Invisible reCaptcha and I've started "playing" with their examples: see them here https://developers.google.com/recaptcha/docs/invisible

Yes, when the page loads the recaptcha is invisible but when the form is submitted the recaptcha challenge appears all the time. You have to click on images, draw something around something else... etc

I've been testing this on different servers, 2 different sites which have the site key approved to use the Invisible reCaptcha, with different browsers form different locations. Same behavior: Google shows the challenge when the form is submitted on all 3 examples they have on their page.

Is this what we should expect?

Answer 1

Just as with the checkbox, if it can't reliably determine if you aren't a bot, you get a challenge. I can confirm that the invisible part does work when you are detected as a human.

Answer 2

Actually you have to approve the Terms of Service when you create a new reCAPTCHA site, that says that

You agree to explicitly inform visitors to your site that you have implemented the Invisible reCAPTCHA on your site and that their use of the Invisible reCAPTCHA is subject to the Google Privacy Policy and Terms of Use.