I'm sure this is new...
If you look at a booking booked through the Qantas website or Qantas TravelSales (Apparently containing any a Qantas flight and departing from Australia) there is now a new button for "Cancel Booking".
If you cancel the booking, then it is converted into an online voucher that can be redeemed later for another online booking of higher value.
I don't have any flights I need to cancel at the moment to investigate this further. Some new Help Documents on the Qantas website have been recently created to provide more information on the cancellation process, and voucher redemption processes.
If you look at a booking booked through the Qantas website or Qantas TravelSales (Apparently containing any a Qantas flight and departing from Australia) there is now a new button for "Cancel Booking".
If you cancel the booking, then it is converted into an online voucher that can be redeemed later for another online booking of higher value.
I don't have any flights I need to cancel at the moment to investigate this further. Some new Help Documents on the Qantas website have been recently created to provide more information on the cancellation process, and voucher redemption processes.