Hello 

Greetings of the day!

Hope you are doing well

>>As per your concern here I would like to inform you that by default in Odoo you can enable reCAPTCHA on the contact form, you need to first enable reCAPTCHA in the Odoo general setting.

Once you enable reCAPTCHA in the generate setting then go to the Contact Us form, click on the website editor and enable reCAPTCHA.

Note: You will see the "Show ReCaptcha" option in the website editor only if it is enabled in the general setting of Odoo.

Moreover, if you want to have this feature on other pages as well, then you can contact us, so that we can further discuss your requirement. 

Thanks & Regards

WEBKUL

Hi Ben, You can verify users by simply installing the custom odoo application called ( Website Recaptcha | Website Form Recaptcha ) by EWall solutions from the Odoo app store!  https://apps.odoo.com/apps/modules/17.0/ewall_website_recaptcha/