If.you believe that a screenshot from the website trumps any other aspects of the contract, fare rules and ticketing history, as well as the Terms of Use of the website posted above, than go for it. I wish you good luck!

For your own peace of mind, I would suggest double checking the entire history of the booking against the terms and conditions for receiving a voucher before spending money on legal advice.

If you're still happy you are in the right after all of the above, go for it, and please let us know how you get on...

Terms and conditions:

• Unutilised bookings made on qatarairways.com or our mobile app can be exchanged for a voucher with 10% more value.
• Voucher exchange is not applicable for ‘Lite’ fare family bookings.
• No-show fees will be deducted from the voucher value at the time of issuance in case of no-show.
• Non-refundable taxes will be deducted from the voucher value at the time of issuance.
• Vouchers can be used for bookings made within 1 year from the date of voucher issuance.
• Voucher exchange can be requested at any time within the ticket validity.
• Vouchers cannot be requested for partially-used tickets.
• Vouchers cannot be requested for tickets that have been re-issued.
• Vouchers cannot be requested for tickets that are booked offline and paid online.
• Vouchers can be requested for tickets that are booked online but paid offline.
• Vouchers cannot be requested for tickets that have been purchased using a voucher.
• After using a voucher to book, any remaining balance cannot be refunded.
• Vouchers can be requested for Qatar Airways flights, or Qatar Airways codeshare flights.
• A refund fee may apply when requesting a refund for a booking paid for using a voucher depending on the fare rules of the purchased ticket.
• If you no longer plan to use your voucher, a refund may be requested by contacting us. Note that a refund fee will be collected, plus the additional value that was added at the time of voucher issuance.

https://www.qatarairways.com/en/trav...%20is%20issued.