David Broadfoot my understanding was Australia and Thailand had the licence treaty. I'm sure I've seen it somewhere, but am struggling to find it. Things may have changed? I do know you can drive in Australia with a Thai licence as long as you are not a permanent resident of Australia. Once you become a PR, you are required to get an Australian licence.
David Broadfoot interesting to hear. I regularly hire cars from the airport using my AU licence and was told it's OK. I'll look into it some more. Thanks! I found this. Not sure how accurate it is?
Depends from which country. Different countries have licence agreements with Thailand which most Thai Authorities, including the Police, don't understand. Your Embassy in Thailand should have the info on their webpage.