Hi, Sue,
Nope, no need to bring the confirmation e-mail. We will have a registration desk set up with a list of all the participants. If there were any kind of problem (ie. an attendee was sure she paid but was not on our list), what we would do would be to take payment for the event, and then check with our credit card processing company to see if the transaction went through. If it had gone through, and our system just missed it, we would immediately refund the credit card and would give the person something additional for her troubles.
Ann
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