Can I enter Thailand and apply for a retirement visa in Udon Thani without the required medical insurance?

@Merv ******

you are confused about some things. You can not get a type OA retirement visa inside Thailand. You can only get this from a Thai Embassy, or Consulate, in your home country. You can get a type O extension based on retirement, but to extend that you must have at least bt800k in a Thai bank account in your name only for at least two months before you apply, and you must show that it came from an overseas source. For the income method from pensions, you must have 12 months of at least bt65k a month every month deposited into your Thai bank account in your name only. There are no exceptions, and there is no more "equivalent" adding up of your deposits. You can not be short one month, and over another month to make up the difference. It no longer works that way. For immigration here lawyer statements concerning your pension amounts aren't accepted, only a notarized letter from your embassy is accepted, and the UK no longer issues those letters. If you get married in Thailand it is pretty easy to get the type O extension based on Thai wife. There are lots of documents to get, but not difficult, and at least bt400k in your Thai bank account for at least two months before you apply. For the income method you need to show 12 months of deposits of at least bt40k each month, with no exceptions, and they must come from an overseas source. This is the visa extension I've been on the last 5 years. To get married in Thailand the only thing you need from your embassy is a notarized right to marry letter, that says you are either single, widowed, or divorced, with the last two requiring additional documents, the death certificate, or divorce decree.