It works only with particular Invisible reCaptcha v2 plugin for WordPress mentioned in the article and it requires modification of the plugin, plus read comment reply above as additional code required for it.

Regarding Contact Form 7, CF7 plugin comes with a built-in Invisible reCaptcha v3 support, but that only works on contact forms, not for comments. As mentioned before, this modification is not possible neither required for reCaptcha v3.

This is a general article about advanced reCaptcha v2 implementation that gives developers an idea, it should be pretty clear with given information.

If you do not have a good knowledge of JavaScript and PHP, it is better to avoid changing anything, as improper modifications will render your captcha non-functional and either open your website to spammers or prevent contact and comment forms from working entirely!

Hi, I hope you correctly implemented backend captcha check. You can verify this simply by temporarily disabling JavaScript e.g. using DevTools* in Google Chrome desktop browser. If you can bypass your own website this way, then you definitely did something wrong.

Keep in mind that Google reCaptcha is not 100% bulletproof anti-bot protection. Unfortunately, there are ways to bypass it, as we have talked about how to bypass captcha in this article here.

* To launch DevTools in Google Chrome desktop browser click on vertical 3-dots Menu (top right corner) > More tools > Developer tools and set option to disable JavaScript (while developer tools window is active).

Hi, we haven’t noticed any substantial spam increase since the implementation of this system. Yes, few messages pass here and there, but don’t confuse it with version 3, which works differently, as you say.