Hi there, could you just remind me please, is it OK for me to go to Chiang Mai immigration any time in the last 30 days of a 60-day stamp to buy an extension (final extension of a 6-month METV), or do I have to wait until there are fewer than 15 days remaining?
Also, if I can bother you, could you re- post that greenish pdf with instructions on what to take to immigration to get a renewal please?
TLDR : Answer Summary
You can apply for a visa extension at Chiang Mai immigration as long as you have 45 days or less remaining on your current stamp. However, the specific required documents may vary, so it's advisable to check with the immigration office for the most current requirements.