I read a recent post explaining what happens if you stay 1 day over on a visa exempt stamp.
Do I need to declare this before I go through passport control, or just go through as normal, and they will stamp it with 1 day overstay? Thanks
TLDR : Answer Summary
If you have overstayed your visa exemption by one day, you can proceed directly to passport control without any declarations. At international airports in Thailand, the exit stamp will indicate 'overstay less than 24h'. However, at land borders, you may need to pay a fine at a designated counter, as the fine waiver applies only at airports.