I went to Nong Khai immigration today to get 60 day covid extension : within 15 minutes had 60 days added to my non -immigrant O (married to a Thai) entry stamp. No 14 day under consideration stamp! My 3 month entry stamp would haved expired on 19th May - stamped to 18th July.I was also told that I don't need to do a 90 day report.
TLDR : Answer Summary
An expat in Thailand successfully obtained a 60-day COVID extension for their Non-Immigrant O visa at Nong Khai immigration. They reported that the process took only 15 minutes, adding the new expiration date to July 18, 2021, and did not require a 90-day report. Comments shared additional insights on the required documents for a one-year extension and a reminder to check passport details.