If you decide that you would no longer like to play on the Neopets site, you can remove your account.
To do this, make sure you are logged into the account you wish to deactivate, and then visit the remove account page (http://www.neopets.com/remacct.phtml) and enter your password.
If your Neopets account has been integrated with NeoPass, you need to request the removal of the account through the NeoPass settings page. Please note that deleting your NeoPass account will also delete all linked accounts.