On the admin panel, I set the registration to be approved by the admin. However, today someone registered, although I didn't receive an email, he was logged in for a while and left. I don't understand how this could happen?

Good morning!

Are you talking about this forum: https://kafic.bosnianforum.com ?
Or have you created a new one?

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There is also a possibility that the user got to your forum through the Topic'it application if you have this feature enabled.

AP - Users & Groups - Users options
Pay attention to these two fields:

Activate Topic'it Connect on the forum
Automatically activates Topic'it Connect users

If you want to completely disable the action of the Topic'it application on your forum, then put No in the 'Activate Topic'it Connect on the forum' field.
If you want to use this application but want to control the user activation process, then specify No in the 'Automatically activates Topic'it Connect users' field

You can read more information about this app in our tutorial: Discover Topic'it: the mobile app of your forum

I closed that forum a long time ago and opened a new one.
I have hidden on the panel that it cannot be entered automatically, as you stated.
I am interested in whether that member is registered through that application and whether he can log in? Hello, thank you

AP - Users & Groups - Users options

If you have the "New accounts activation" field set to "Admin", the user was able to register and log into the forum only through the Topic'it app.

Change the Topic'it app settings I wrote about above and delete the user's account. He will no longer be able to log in as a user until you approve his account.

Also specify the address of the forum for operative solution of questions.

Since we have not received a reply from the author i will mark this as solved
If it is not please pm me to reopen it

Problem solved & topic archived. Please read our forum rules: ESF General Rules