Do I need proof of accommodation for a Sri Lanka visa?

When you apply for the ETA, you do not need to upload hotel booking details. Still, you must list an address you plan to stay at in Sri Lanka. Upon arrival, immigration officers may ask you to show evidence.

It is a good idea to lock in a confirmed stay for your first few nights. If you keep a printed copy or save an offline screenshot of your hotel confirmation, it can make the check at immigration less stressful. This helps show that you are travelling for tourism and that your plans are in order.