Me and some friends are travelling round countries in South East Asia.. and starting in Thailand. We have not booked a return air flight or any other tickets such as sleeper trains as we are unsure of when we are coming home and when we are leaving Thailand. however, we probably won’t be there any longer than 30 days. Everywhere online says to get a single entry tourist visa we will have to have a air ticket paid for in order to get a visa... just wondering if this is always the case?