COVID teached me a lesson. OA visa must renewed in your home country. So I had to travel during COVID with all that restrictions. Wasn't easy with all that special paperwork. So I changed now from OA to O which I easily can extend in Thailand every year while OA extension is not that convenient.
They have to check your insurance validity. OA visa could give a full year stamp at every entry if your health insurance match that period. Otherwise you will be stamped in for the validity of your current insurance.
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