Based on reports I have rec'd, Jomtien Immigration is being fairly consistent for those using 800,000 baht in a Thai bank.
GB:.Pattaya immigration has been requiring those who used the 800,000 baht method to return 3 months later with their updated bank passbook to prove you never let the account drop below 400,000 baht. As far as I know, Pattaya immigration is the only immigration office in Thailand doing that
To clarify, GB's comments, I think he meant to say Jomtien Immigration requires you to return after 3 months to show you have not let the account balance drop below 800,000 (instead of 400,000), which is the new requirement as of March 1, 2019 rule change. Although the new rules say the 800,000 needs to be on deposit for 2 months before you make application (previously it was 2 months for new applicants and 3 months for renewals), GB is correct that there have been reports about some Immigration offices still saying it must be 3 months - however, I don't believe Jomtien Immigration is one of them as the document they have you sign to acknowledge the date you need to return (3 months after) shows the applicable rule in English, which clearly shows only the 2 month requirement. At all other times, you must maintain at least 400,000 baht in the account if you want to be able to renew using money in the bank method the following year.
Also, at Jomtien, they are apparently now requiring, when using the 800,000 in the bank, that the bank letter be dated on the date of application and also show a transaction in the account. At last Sunday's Pattaya City Expat Club meeting, a friend of mine said they renewed their extension the previous week. No problems encountered except they had to go out, do a transaction, and update their passbook to show it was made.
As to the 65,000 baht monthly income. If your Embassy still provides a letter saying the income was verified (whether it was or not, so long as the Embassy says it was), then that is all that is needed. I did see a report a month or so ago (Thaivisa as I recall) where a person whose Embassy still issues the certification letter, tried to renew (I don't believe it was at Jomtien) by showing bank records/letters and was told not acceptable, go get your Embassy letter.
As to what Jomtien requires, I had only one or two reports. One which was sent to me by email last week, the person also had just renewed that week. He said in addition to evidence of the source of his income (pension statement in his case) and Thai bank passbook, and his Thai bank statements verified by the two banks he used, they also wanted a letter from his Thai bank verifying the account name and balance -- same letter as used by those using 800,000. He mentioned that he used transferwise to his SCB bank but switched to Bangkok Bank early this year so the deposits would show as foreign transactions. He said that although his SCB statements did not indicate they were from a foreign source and had copies of his transferwise transactions and bank statement for his home bank where his pension was received in case needed, the SCB deposits were not challenged and he was not asked for any additional documentation.
Also, I have heard that Jomtien Immigration has a "sample bank letter" regarding the deposits to your account that you can provide to your bank to show what they want to see. However, I have not seen a copy of the example -- if anyone should happen to be at Immigration and obtain one, I think most of us will be most appreciative if they post a copy here and/or if they send a copy with an email to info@pcec.club, the PCEC will publish a copy.
I will be doing my renewal in June (one month before my renewal date) using the 65,000 baht monthly income method - being from USA, I will need to have all the relevant bank documents/pension statement. I do use Bangkok Bank and prior to March 2019 used ACH transfers through their NY branch in excess of the 65,000 baht monthly minimum. Since March, I have been using Transferwise. So, all of my transfers will show as foreign transfers (FTT code). Once I go through the process, I will post my experience.