I&#039m programming a "Question of the Day" or survey in an ASP page and I want to detect when someone who has already voted cannot do it again. I know many ISP&#039s dinamically assign IP addresses, so ServerVariables("REMOTE_HOST") can&#039t help. Cookies arenĀ“t reliable. I&#039ve programmed Outlook objects from VBScript on the page to look at Contacts and email addresses, but this method is yet less reliable. Do you know a way to do this?