@Damien ****
AS OF RIGHT NOW, you can apply for a 60 day extension of stay based on unable to travel due to COVID-19 when you have 3 days or less remaining on your current stamp. For Bangkok immigration only, the forms can be found at
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Different immigration offices have different requirements, but all require the following:
1. Your passport and:
a. a copy of your data ("picture") page
b. a copy of your most recent visa (if you have one)
c. a copy of your most recent stamp
d. a copy of your departure card
2. MAYBE A TM30, filed in the immigration office.
3. The forms (I posted above for Bangkok immigration)
4. *MAYBE* A letter from your embassy saying you can not return, OR a print out from your embassy website saying they don’t issue the letters, OR a print out of a letter from the embassy saying they don't issue those letters (I don't know if this is being asked at Bangkok immigration).
5. 2x passport pictures
6. 1,900 THB.