Originally Posted by
BinSabai
this advice is spot on!
there are many reports, that a train ticket or bus ticket to leave the country is not accepted. It totally depends on the check in agent.
But the OP says they have got an outbound ticket from Thailand. But it is more than 30 days after they land in BKK. So that should not be an issue for them. They are entitled to extend their stay at Immigration for 30 more days after paying. That falls within limit of their outbound ticket from Thailand. I never had an issue with this.