How to delete a member

Sorry if I'm repeating. I've had a look but couldn't quite find it. I have a member who has joined up twice and wants to delete one of the usernames. How do I do that as admin? How can they do that as a member?

Thanks!
Cas

You can delete his account by going to admin panel=>Users & Groups=>Users=>Users and click on his name in that list.Now scroll down the page until you find the "Delete this user ?" option. Check that box and then click the save button.

Thank you so much. That was easy!!!

Cas