Do they still check for a return ticket upon arrival in Thailand?

Travelers may still be asked for proof of onward travel, including return tickets, when arriving in Thailand. While airlines may be more likely to check this requirement before boarding, immigration officers at arrival can also request it. It is advisable to have a printed copy of the ticket, as phones may fail or lose battery. Some travelers have reported being asked for proof of onward travel, and in some cases, they provided a booking confirmation for a flight that hadn't been paid for yet.