That is an understandable mistake. We have visited Thailand visa-exempt about 10 times since year 2000 and were not aware. The Thailand embassy in Stockholm unfortunately has a reputation to give poor service, so it is usually avoided completely. Only this year we discovered the requirement to carry at least
*****
THB as a family (we entered yesterday looking well-financed I guess, so were not requested to show the money). I agree that there should be a simpler way.
What does "72 hours" mean? Is it LATEST 72 hours before, or EARLIEST 72 hours before arrival? Unfortunately, it is difficult to find online reliable information about the ever-changing rules.