Does the 90 reporting applies only if you are physically in the country ? For example, on the 80th day, I exit the country and 20 days later I re-enter (lets assume all re-entry permit, validity etc is ok). In this case am I 10 days late, or does the 90 day clock starts again at day 1 of re-enter date.
TLDR : Answer Summary
The 90-day reporting requirement in Thailand applies only when you are physically in the country for 90 consecutive days. If you exit the country before reaching the 90 days, the counting resets to day one upon re-entry. It is crucial to report to Thai Immigration within 24 hours of re-entering Thailand; when doing so, you can confirm your next 90-day report date with the immigration officer.