Last updated: 2021-06-26

Source: https://support.freshdesk.com/support/solutions/articles/225184-users-are-complaining-that-they-are-required-to-enter-captcha-each-time-they-start-a-forum-topic-cre

Mandating the users to enter a Captcha before creating a Forum topic has been put in place to deflect spam users from your account. However, if you wish to turn it off, you could have this done under Admin > Channels > Portals > Settings.