The electronic ticket is what the online reservation is based on, as the airline issues it for you and it includes your personal details (your name and passport number) and reservation details (flight path and payment details). Of course, you must print the e-ticket receipt and attach it to your passport to show security and airline agents when you enter the airport so you can complete the travel procedures. You can print your voucher through your personal account on the Emirates Airlines website or by printing the e-ticket that Emirates Airways sends you to your email address. Remember that if you book on the Emirates Airlines website, you will receive an email with your e-ticket.