same here! Even though I had the money the agent still deposited the funds and immediately withdrew later the same day. I then deposited my funds into the account. But next years renewal the bank would not certify the funds stayed in the account for the post extension 3 month period.
but you are purposely leaving out the illegal 800k bank account funding by the agent that so often is part of the 28k baht fee.
And then the money is withdrawn immediately so the required balance of 800k for 3 months after the extension is granted is not there. Likely invalidating the extension and absolutely requiring one uses a agent again next year. Continuing the illegal practice.
i will test again but at my last visit to immigration they told me if the address has not changed and I did the TM30 after arrival it should work online
was not that simple or straight forward in my case. What is proof? Thailand was demanding a letter from my home countries embassy as proof. Several countries will NOT provide such a letter. Including my home country.
I went 800k route and will attempt again at renewal to qualify based on Pension statement, bank statement all year demonstrating the minimum 65k deposit per month transferred from a foreign source.
I am a little bit confused by your question since you need to have a bank account opened in Thailand in order to apply for and receive a retirement extension
As you state the required balances of 800,000 / 400,000 are conditions of the retirement extension.
You can whatever you want with your bank accounts but dropping below the required levels void the conditions of the extension.
Can you get away with it until it is time to renew again? Probably
What would an immigration officer say if they somwhow became aware that that required balances where not maintained mid-term? i don’t know but I am betting it could be a problem.