What is the process for obtaining a retirement visa extension based on monthly income in Thailand?

Yesterday I got a new 12 month extension based on being over 50 at Nakhon Phanom immigration office. Firstly what a great new building they have moved into. Much bigger and with many more counters. It was not busy as I had expected on Monday morning. I had made an appointment on line.

I was changing from banked money to monthly payments of 65000 baht or more. My Bangkok bank book clearly showed 12 monthly ftt payments. I also had to provide bank statements for the 12 months and those downloaded from the app and printed by me were accepted. My bank book showed a transaction on the day but my statements were two days out of date which was not a problem. I was also asked for proof of where the monthly payments had come from and I was surprised by this. However, I provided my UK bank statements and highlighted the transfers. It took quite a long time for the officers to check the outgoing and incoming payments matched up. I was asked to provide copies of the relevant house books but was told the signatures must not be copies. Luckily I had the originals with me.

I thought that this information would be helpful to those planning to make the same change to their funding for the "retirement Visa".

A letter from the bank was mentioned but I did not have to provide one. In fact, I needed nothing from the bank on the day except the updated bank book. Not the same as for using banked 800000 baht. I bekeive that the Officers had little experience of the monthly payment method but were very helpful.