If you would like to change your Namecheap account username, you must create another Namecheap account with your desired username since it is not possible to edit an existing username.
Please make sure you use a different email address as the system will not allow a previously-registered one to be used.
Once you have done this, you can move the services you have with us to your new account.
Please note that Namecheap apps and account funds cannot be transferred between accounts.
