Here's what we've found for .
You can edit or delete the offer until it is accepted by Air Serbia, but no later than 6h before flight departure.
If you want to change or cancel a flight after Air Serbia has accepted the offer, you will not be refunded for the amount relating to your offer. Upgrades cannot be transferred. Air Serbia does not have an obligation to provide the accepted offer for an upgrade on the new, changed flight. In addition, the Conditions of Carriage for the original ticket also apply.
If you want to cancel a flight before Air Serbia has accepted your offer, the offer for an upgrade will no longer be valid. If you wish, you can make a new offer for the new flight booked, if this is possible. The previous offer cannot be transferred automatically to the new flight.
After you have canceled your initial offer for an upgrade, you can submit a new offer via the Air Serbia website. Alternatively, you can use the links in the original email sent to you inviting you to make an upgrade offer.
You will receive an email notifying you that your offer was not successful. Your credit card will not be charged and you can travel with the ticket that you already have.
Numerous factors impact the selection process and therefore we cannot specify why certain offers are unsuccessful.
No, you will no longer be able to make other offers for the same flight.
You cannot select your seat when you send your upgrade offer. If your offer is accepted, you will automatically be assigned a seat in Business class. Alternatively, you can choose a different seat during check-in.
If the ancillaries you have already purchased are offered in Business class, the services will be provided.
If your connecting flight is not shown on your itinerary page you will not be able to check in for that segment. You will be able to check in online only for parts of the journey shown on your itinerary page.
As per the regulations you are not allowed to board an aircraft if you carry any of the materials indicated on the list. You need to remove those materials in order to complete the check-in process and board the aircraft.