To whom it may concern: Just got a 60 day covid extension (first time) on an exhausted STV visa (which has been renewed 2 times already) at the Chiang Mai office. No reason or explanation needed. No insurance needed. They still practice consideration stamp (have to come back 2 weeks later to get real stamp).
TLDR : Answer Summary
A user successfully obtained a 60-day COVID extension on their exhausted Special Tourist Visa (STV) at the Chiang Mai immigration office. They noted that no insurance was required for the process and that they will need to return in two weeks for the official stamp. This development contradicts the common understanding that extensions were not available for STV holders.