You can redeem one voucher for each passenger occupying a seat within your booking, and up to nine vouchers per booking (when booking for up to nine passengers). The name on the voucher should match the name of the passenger in the booking.
For example, if you are booking a trip for three passengers, you can use up to three vouchers, as long as the name listed on each voucher matches the name of each passenger in your booking.
For further enquiries contact our local offices. Contact details can be found in the following link https://www.qatarairways.com/en/help.html