What is the process for changing from the Thai bank method to the pension method for a Non-O retirement extension in Chiang Mai?

Make sure the transfer show transfer number not always show if banks transfer imt I think, been rejected few times becouse that

The "pension method" still involves a Thai bank as you must transfer minimum 65k each month from overseas into your Thai bank account. Before you can extend on this method you must already have 12 months worth of 65k transfers to show

𝗜 𝘂𝘀𝗲𝗱 𝘁𝗼 𝗱𝗼 𝘁𝗵𝗶𝘀 𝘆𝗲𝗮𝗿𝘀 𝗮𝗴𝗼. 𝗕𝘂𝘁 𝗺𝘆 𝗰𝗼𝗻𝘀𝘂𝗹𝗮𝘁𝗲 𝘀𝘁𝗼𝗽𝗽𝗲𝗱 𝗶𝘀𝘀𝘂𝗶𝗻𝗴 𝗳𝗶𝗻𝗮𝗻𝗰𝗶𝗮𝗹 𝗮𝗳𝗳𝗶𝗱𝗮𝘃𝗶𝘁𝘀. <- so in other words you've NEVER done proof of funds based on monthly income by international transfer :/

switching from banked money method to proof of funds based on monthly income from abroad (for countries whose embassies don't issue income affidavits) works like this

You MEET the requirements for the extension you're on using banked money method <- meaning you keep the 800K baht in the bank for 3 months after the extension is granted and then you never let the balance go below 400K baht the rest of the year until your next extension application.

AND

While you're doing that, you transfer in to your thai bank account from abroad a minimum of 65k baht each month, every month for 12 months so that when you go to get your extension you can show a year's worth of incoming international transfers.

you get a year transaction report showing every transaction on that bank account for the last year <- that is how the immigration office will check that you followed the seasoning for the banked money extension you're on now AND that's how they will check to see that you met each month's required transfer for the extension you will be applying for..

It can be done, it's not brain science or rocket surgery, just takes planning..

Best of luck with it