What are the format requirements for my user name and password?

Your user name must be between 4 and 20 characters long and must contain at least one letter. Your user name cannot contain your birth date, account number, or Social Security number. Your password must be between 8 and 100 characters long and must contain at least one upper case letter, at least one lower case letter, and at least one number. Your password cannot contain your user name, birth date, account number, or Social Security or Tax ID Number. User names and passwords are case sensitive and cannot contain spaces.