What is the online check-in voucher number of Capital Airlines?

The online check-in voucher number of Capital Airlines means that after purchasing the ticket online, the airline will send an email or a short message to the passenger, which contains a unique number, namely the online check-in voucher number. This number is what passengers need to enter when checking in online. It can help airlines to confirm the identity of passengers and ticket information, thus providing passengers with more convenient check-in service. Online check-in voucher numbers are usually composed of numbers and letters, and the length is not fixed, and each number is unique. When passengers check in online, they need to enter this number and follow the prompts to complete related operations, such as seat selection and boarding pass printing. If the passenger does not receive the online check-in voucher number, he can contact the airline customer service for inquiry and handling. In short, the online check-in voucher number is the only number that passengers need to enter when checking in online. It can help airlines to confirm the identity of passengers and ticket information, and provide more convenient check-in service.