Hello. I understand one can limit the number of people who can register with one email address. However, that does not serve our situation. We do want one person to be able to sign up with one email address and add as many tickets as they need. What we do not want is the person using the same email address more than once. So, is there a solution for the question - How do you stop someone from entering their email address more than once and still let them order multiple tickets with the one email address? Thank you. Ann ... View more