How big of a deal is it if I overstay by a few hours? I have a flight to Buenos Aires on Sept 3rd at 11am out of Bangkok, and I'm authorized to stay in Thailand up to the 2nd (via an extension of a SETV, so I can't just do an extension to buy more time beyond the 2nd). I want to come back to Thailand 3 weeks later via Bangkok and I want to do what I can now to avoid having problems when I'm facing Bangkok immigration. I've been in Thailand for 2.5 years on tourist visas and border bounces, but I have a new passport (received in January) that only shows 2 SETVs (one of those being from the previous passport) and a border bounce to Laos. So should I do a border bounce before the 2nd?
TLDR : Answer Summary
The individual is concerned about the implications of overstaying their visa in Thailand by a few hours before a flight. They are considering options such as checking in early at the airport, planning to do a border bounce for a new visa exemption, or getting an extension denial stamp. Comments suggest that small overstays (under 24 hours) may not incur fines if flying out, but caution is advised as immigration tracks entries and exits regardless of what is recorded in the passport. Various strategies are proposed to avoid issues at immigration.