@David ********
>My understanding that you have 10 to 14 days to leave the country after your work permit expires or no longer valid
1. IF you work for a BOI company, there is a grace period.
2. You can cancel your work permit or extension of stay ahead of time, allowing a "grace period.
When a person's extension of stay based on employment is cancelled, a person has until 11:59 PM THE SAME DAY to leave Thailand. They *CAN* file an extension of stay.
If the immigration officer believes the extension of stay is not valid, it will be denied, and they will get a 7 day extension of stay denied stamp, requiring the person to leave Thailand no later than 7 days. In PRE-COVID-19, people would request to get an extension of stay denied stamp for some extra time to leave and return.
During COVID-19, I recommend for a person to apply for a 60 day extension of stay based on unable to travel due to COVID-19. They will have an extra 60 days to either figure out a way to go home or to figure out a way to stay.
All extension of stays are 1,900 THB.