12) Which documents do I need to take to the airport if I've checked in online?

You'll need to bring your home printed boarding pass or confirmation of check-in document and your passport to show before you board the plane. 
Your boarding pass
When you check in online, you'll get boarding passes or Confirmation of Check In for both your outward and return flights. You'll need to print out each boarding pass on its own individual A4 page. If you can't print them, you can collect them from the TUI bag drop desk when you arrive at the airport.
Your boarding pass will have a barcode that needs to be scanned, so there should be no rips and tears in it. It's an official security document, so you'll need to keep it safe until you've arrived at your destination. We can't accept any unclear, faded or blurry boarding passes, and we reserve the right to deny boarding or cancel your reservation if you don't have the documentation you need.