You can redeem your access- or promotion code at the start of the booking process, if you received one from your organizer.
All tickets have to be activated by an access code.
Please contact the organizer, if one of the codes is not valid.
Please note that that codes are being displayed as not valid, if you did not finish typing the codes into the required field yet.
Please also note that it is not possible to use the codes for tickets, where the booking process is already finished. Please ask the organizer to cancel your tickets, if you booked tickets already without using the codes. You can then rebook the tickets, using the codes in this case.