Great question — answering as the UphillTech team:
People do not need a copy of your passport to book you a plane ticket. They don't even need your passport number. They will need your full name as it is written in your passport. That is all. After they book you the ticket, they will forward you the emails from the airline that include a reference number, sometimes called PNR . You can use this number to access the booking and select seats, request special meals, add a frequent flyer number, provide passport details in cases where they are required in advance, and check in online. (This will also include details like the price, and act as a receipt if you need one to be reimbursed by an employer or whatever.) I have flown at least 3 and...
Full answer by Kate Gregory: https://travel.stackexchange.com/a/205719 (CC BY-SA 4.0).
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