You can use your Air Canada Travel Voucher by simply entering the Air Canada Travel Voucher number you receive, along with the four-digit pin code you receive. The voucher is fully transferable, meaning the buyer can use it themselves to to make their purchase and any reservations made will be under their name. The voucher be used on multiple occasions until the value depletes, so it does not need to be used for a single purchase. The voucher never expires therefore it can be used for booking reservations now, a year from now, or even 2-3 years from now. Using the voucher is simple and easy as it is just an online code and pin that can be added to the payment section when booking flights online through Air Canada.