I am from US and have been on an O retirement visa with 800000 for several years, and now I want to apply for the 65000 income monthly version. What financial documentation does immigration want? Is a signed statement from Kashikorn showing the deposit for that month enough?

For several years I have extended my retirement visa based on the 800,000/400,000 bhat bank deposit amounts. I want to change to the 65,000 bhat/ month deposit into my thai bank. The applicable paragraphs of the retirement extension requirements published by the Phuket immigration office state: "Either a letter and statement signed and stamped by the bank of a monthly transfer of at least THB 65,000 a month as income from abroad. And a copy of your bank book with the first page, and in case of proof of income by the bank, a copy of the last 2 months (one year by monthly proof of income)."

My question is, must I show both monthly income AND 800,000/400,000 in my bank statements for 1 year in order to switch the basis of financial requirements OR must I show only 2 months of monthly income and 800,000 before applying for my next extension?

Thanks in advance for your experienced answers.