Need to add multiple contacts using one email address
We host annual health fairs. We have entire families that register multiple family members and use one email address. The problem is one person will receive a reminder email and believe the other family members are not registered or something happened to their registration. Is there a way to not only compare the email address but the first name and last name? That way if there is a duplicate it will remove that record and if not then it will send one email for each person.