Yep, that was what I was thinking. The rest is some paperwork. Also, what you want an IN THAILAND Non imm O based on retirement or the same but asked in a Thai Embassy/Consulate in y'r home country. Both are for 90 days stay in Thailand, so after 60 days or so, you can go for a year extension.
Aha, Korat. Normal is only passport. Did my first 90 days again after holiday trip. Had copies TM47, TM6 and copy entry stamp from passport. Lady trown all copies in the bin, looked at my passport, then computer, printed the paper with next date and ready. So think you need nothing as y'r passport.
, there should be one of the more than 70 Immigration offices š in the neighbourhood (Google maps). And indeed, when you aleady have a TM30, it's a bit more safe to ask for the extension. You can do it right away over there because the 30 days will be added to your current days.
I don't know for each country, but I remember told by A lawyer from Isaan Lawyers, that now it's possible to make a cross reference to a will from your home country and a Thai one. Again, you have to ask.