Thank you all for your comments. I think there is one important point that may have caused some confusion. My current extension was not based on the monthly transfer method. It was based on the income verification letter issued by the French Embassy. My Immigration office accepted that letter without requiring evidence of monthly transfers. The French Embassy still issues these income verification letters. However, when my current extension was granted, the Immigration officer told me that, for my next extension, I would have to provide evidence of monthly transfers. At that time, no alternative based on the 800,000 THB bank deposit was mentioned. As a result, I have not made any monthly transfers during my current extension. My concern is therefore the following. If I now decide to switch to the 800,000 THB bank method and comply with the requirement of keeping the funds in my Thai bank account for at least two months before applying, could Immigration nevertheless refuse my application because I cannot show monthly transfers from February 2026 to January 2027? If that is the case, I would transfer and tie up 800,000 THB for nothing. Has anyone had first-hand experience of switching specifically from an extension based solely on an embassy income verification letter (without monthly transfers) to the 800,000 THB bank method?