I am in need of a retirement visa extension

As of today September 30, 2019 I have been told

( By a Chiang Mai Visa service ) that my government money/pension being deposited into American bank equaling 72,000 per month is sufficient for my visa retirement extension

I was told it does not need to be in a thai bank as long as I have a letter certifying the money is coming from a retirement fund?

also I was told I would need a one year paper trail of my 72,000 baht per month deposits into an American bank

has anyone had a retirement visa extension done in the last month?

Is it possible to get a retirement visit Extension without having money in a Thailand bank?

Thank you

In a few weeks I will be going back to my home country to apply for my ' retirement visa '. I have 800000 baht floating around, its ok to transfer from my home account into my Thai account and just leave it there? Thinking ahead to when I apply for my o-a extension after 90 days, then the next extension a year later. Thanks in advance.