Airlines give out vouchers to passengers when they have been bumped off a flight or to compensate them for other troubles in their travel. These vouchers can generally be redeemed for future travel on the issuing airline. Many people decide they would rather sell these vouchers rather than use them for themselves. Unfortunately, most airlines forbid this in the terms and conditions of the voucher and can cancel the voucher if they determine that it was sold or bartered. Check the terms and conditions associated with your voucher and how to best transfer it to another person before considering selling.
Determine how much your voucher is worth to others. A $200 voucher will not be worth $200 to the person buying it. The sooner the voucher expires, the more difficult the voucher is to redeem, and the airline the voucher is issued by all determine the value. Check online auction and sales websites to see what similar vouchers are selling for.
Decide how you want to sell your voucher. Sell it to a friend or barter it, list it on a classifieds site or list it on an auction or sales site. The advantage of the first two options is that you can deal with local people and lower the risk of fraud or confusion.
Write a clear description of the voucher if you plan to sell it online. Include the face value, expiration, the airline and any relevant terms and conditions that the buyer will need to know. This helps the buyer to determine the value and usability of the voucher.
Set a price and consider being open to negotiate down a little bit if you list on a classifieds site. Online auction sites offer a wider audience and allow for a higher potential selling price. Most auction sites require fees to list your item, and you can set a minimum sales price.
Post your voucher for sale.
Transfer the voucher to the buyer after it is paid for. This may be as simple as handing it off or as complex as having to book the ticket for the buyer from your frequent flyer account. Do what is needed to allow the buyer to best utilize the voucher.