If the plugin is enabled, when an unauthorized user makes an exchange, they are registered using the email address in the created request.
Registration only occurs if the email address is not already registered.
Enabling the auto-registration plugin enables registration by default for all exchange directions.
To disable auto-registration for any exchange direction, go to that direction, go to the "Restrictions and Checks" tab,
Check the "Disable automatic registration" checkbox
and click "Save." This will disable automatic registration for that specific exchange direction.