I've already entered Thailand for 30 days without onward transport and fortunately this was not a problem.
As I am applying for a visa from the embassy I am aware there will be more scrutiny of documents etc which I am happy to supply.
However my only query is that many people obviously get the 60 visas, then get extensions whilst in the country so unless they change their onward travel arrangements once there, they must have been issued the 60 days without onward travel
Obviously realize that they may be clamping down for the above issues. Just thought I would see what the general consensus is before having to book transport
I believe you would have to do a visa run and leave the country.
Not sure if you'd be able to apply for a fresh 60 days but you can leave and reenter for an extra 30 days (think is twice by land enter and unlimited by air)
I wouldn't worry too much about onward trNsport, it would only be the airline you are travelling with that ask and worse saw scenario you book a super cheap flight out to one of the neighboring countries. This can be as little as £20 and I know the onward travel companies charge that much for their tickets so you are more likely to save doing it last minute than preparing for something that rarely happens
If you only wanted 30 days so you would not have to visit the embassy , just leave the country and re enter for a new 30 day stamp.
For the 60 day visa the embassy has to approve these, or for the 30 day extension (whilst in Thailand), and there is a fee for both of these but not the initial 30 days