Do I need to show my departure ticket when entering Thailand visa-free with AirAsia?

When entering Thailand visa-free with AirAsia, it's generally required to show an onward or departure ticket, especially during check-in by the airline. Though it's rare to be asked for this ticket upon arrival in Thailand, the airline may deny you boarding if you cannot prove you have a way to leave the country. Different travelers have had varying experiences, with some only needing to confirm they could afford a return ticket.