Will prebooking a return flight for a 90-day stay in Thailand cause issues at immigration?

When traveling to Thailand under a 60-day tourist visa with plans to extend for an additional 30 days, travelers often wonder if prebooking a return flight that aligns with their 90-day stay will lead to issues at immigration. According to community feedback, immigration rarely checks return flights, with airlines being more likely to inquire about proof of onward travel. Some users suggested alternatives such as booking accommodations in nearby countries or utilizing 'onward ticket' services to satisfy airline requirements, while others shared their experiences of not being questioned about return flights or needing to show cash and accommodation details upon entry.