You can sell your ticket or give it to someone else any time. But if you want to change the name of the ticket owner and make sure he or she gets a printed name badge with their own name, please send an email to firstname.lastname@example.org. It must include the ticket number and the name and email address of the new owner.
Changing ticket owner names is only possible until May 15, 2015. Afterwards, we won’t be able to change the original name on the ticket and nametag to that of the new attendee’s. However, you can still sell or give your ticket to someone else. Please also note that it is up to you and the new recipient to work out your own payment method.
A ticket is only valid for one person and can't be shared. You'll get a wristband in exchange of your ticket which you need to keep on your wrist for the whole event.