Do I need to show a return flight when applying for a 60-day tourist visa to Thailand?

When applying for a 60-day tourist visa to Thailand, it's generally recommended to show an onward ticket rather than a return ticket. While some applicants report being able to use a one-way flight without issues, others have had their applications rejected and were asked to provide evidence of outbound travel. Alternatives like a bus ticket to a neighboring country are also considered acceptable.