There are multiple hooks for user registration. https://usersinsights.com/wp/wp-content/uploads/2018/07/user-registration-hooks-2.png The `register_post` hook is executed first and after that there is `registration_errors`. The captcha verification is done in `registration_errors` hook. But because we were using `register_post` we were saving the subscriber before the post request was verified. [MAILPOET-2114]