The ReCAPTCHA V3 works in the background of the Contact Form on your webpage, watching how users interact to decide if they are real, which causes issues with the submission of the contact form.

However, sometimes its submission score is low, even if a real person submits a Contact Form. If the ReCAPTCHA V3 scores a user interaction low, ReCAPTCHA V2 can provide stronger verification through interactive quizzes.

If you set up both ReCAPTCHA V3 and V2, then you will get a better ratio of successful submissions.

How reCAPTCHA v2 Works?

The reCAPTCHA v2 verifies a user as a human by presenting a challenge. Users are asked to click "I'm not a robot" checkboxes or to solve image-based puzzles, for example, selecting traffic lights, buses, crosswalks, etc.

It analyzes user behavior, like mouse movements, and compares it to human patterns that help prevent bots from accessing websites.

ReCaptcha V2 Fallback Option in Site Settings.

You can enable the reCAPTCHA V2 Fallback as an option in the Google Tab of the Site Settings. If you check this parameter and the reCAPTCHA 3 check fails on your website, reCAPTCHA V2 will be shown, and the user will have to solve a quiz.