As taken from our FAQ:
As a member of MiceChat you are allowed one account/screen name and only one. If someone else in your householdwants to create an account for themself that it quite alright and welcome, but what happens if you create another for yourself ? Well, that is what is known on the internet world as a 'sock puppet'.
It's not permitted on MiceChat. Creating one can result in being permanently removed from the boards.
So please don't do it.
If you simply want to change your name just PM an administrator with your request, or use the 'Contact Us' form at the bottom of each page.