If a member bookmarks the www.itsme247.com URL, they will need to know your credit union ID in order to log in.  However, if the link from your website automatically passes that CUID to It's Me 247, when the member logs in that way the system will not require the member to enter that ID (even if they click the "next visit" or "I want to log in again" button on the login page after being timed out or logging out).