I am using the standard signup form with various types of subscription all of which allow 15 days free access to the site. How do I stop people from registering multiple times to get free access every 15 days? Also although the email address field is obligatory on the form, I have had someone signing up without giving any details except for a user name. How can this happen?
I want to configure the sign-up form so to validate email address. But it produces an internal script error when the link given in the confirmation email is clicked.