Generally, you do not need to print TUI boarding passes if you have a smartphone capable of displaying a digital QR code. TUI encourages the use of the TUI App, which allows you to check in and save your boarding pass directly to your device or your phone's digital wallet (like Apple Wallet or Google Pay). This is valid at most major airports across Europe and the UK. However, there are critical exceptions: if you are flying from certain airports in non-EU countries or specific destinations like Turkey, Egypt, or Morocco, local security regulations may still require a physical, printed paper boarding pass. Additionally, if your phone has a cracked screen or a low battery, the scanners may fail to read the code, leading to delays at the gate. If you are unsure about the digital infrastructure of your departure airport, printing a physical backup is a safe "peace of mind" strategy. If you choose not to print at home and find you need one at the airport, TUI may charge a significant fee for printing it at the check-in desk, so it is always best to check the specific "Passenger Info" section of your booking for the requirements of your specific flight route.