I live in Bangkok but my car is registered in Rayong. When I want to sell it, does it have to go back down to the land transport place in Rayong to change over the paperwork or can I just do this in Bangkok?
TLDR : Answer Summary
You can sell your car without taking it back to Rayong. The transfer of ownership paperwork can be handled at any MOT station in Bangkok where you get your tax done. The new owner will need to register the vehicle using the documents you provide, which may involve sending paperwork back to Rayong if they are in a different area. However, if the registration happens in Rayong, it may take a couple of weeks.