Do I need an onward ticket when traveling from Kuala Lumpur to Thailand with AirAsia or Batik Air?

Travelers can use either AirAsia or Batik Air for flights from Kuala Lumpur to Thailand. Based on community experiences, it appears that while checking in through AirAsia, many passengers successfully used automatic gates, minimizing face-to-face interactions with airline or immigration staff. However, there are mixed reports about whether onward tickets are checked; some have had their documentation verified at the gate by airline staff. For those considering onward tickets, options include using services like onward ticket websites or purchasing from airlines directly.