[Black Tiger]

1.) logout of your forums and register as a new user called test or something.
2.) use a fake email adres like idont@wantmail.com
3.) go and proceed with registration.
4.) Go to you admincp and set user "test" to the registered usergroup.
5.) Since you registered with a non-existing email adress, the verification email will get bounced (hence you have activated verification check by email), click the link in the email and you will see that user test will be moved to another usergroup if you have set it up that ezbounce does that.

You dont have email verification? No problem, same action but now under 4, also send this user a password reminder from the admincp, the effect is the same.
Have fun testing!