Your user name and password Your user name is used principally to identify you when you log in. In addition, if you are signing up for a paid membership, your user name will form part of the URL for your Publishers Marketplace Web page. For example, if your user name is "user," your URL will be "http://www.publishersmarketplace.com/members/user." Only letters and numbers are allowed in your user name; it cannot contain punctuation, spaces, or special characters. Your password is required only when you log in. As with your user name, it cannot contain punctuation, spaces, or special characters -- just letters and numbers are allowed. Passwords are also case sensitive, so make sure to record your password exactly.