A reissue is a name and date of birth change on your ticket. Tickets are issued in the name of the attendees at the time of purchase and the ticket can only be used by the person whose name appears on the ticket. Reissues allow you to change the name if the original attendee is no longer able to use the ticket.
Only the original purchaser of the ticket can reissue the ticket, this is to protect your privacy and eliminate fraud.
For further details, please review the Reissue Terms & Conditions found in your confirmation email or check the event website.