If you purchased multiple tickets using the same email address, all of the confirmation emails were sent automatically. Unfortunately many email providers flag multiple emails containing similar content as spam. Please be sure to check your spam folder because chances are that's where your missing Ticket Confirmation email/QR Code are. 

If you are still unable to locate it and it is possible that the email address on the ticket is incorrect, please feel free to reach out to australiainfo@vidcon.com with the first and last name of the attendee who is missing their ticket, and we would be happy to locate it for you!