What documents are required to apply for a Non-O visa for retirement in Thailand and what is the procedure at Chaeng Wattana Immigration?

It's NOT the transfer the money into the country in time because to apply for the initial 90 day Non-O visa there is no seasoning on the funds (it just needs to come from abroad)

The linch-pin is having enough time on your entry stamp or extension to cover the under consideration period. In Bangkok you need at least 15 days or more to apply for an in country Non-Imm visa.

At Chaengwattana you want counter C-1 <- that's the counter that issues in country Non-Imm visas.

You go here

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You'll also need copies of your passport pages, with your data page, your entry stamp, and any other pages they decide is needed. You'll also need copies of your bank book pages showing your data page, and your deposit history. Tell the taxi Chaeng Wattana immigration, and they will take you to the back of the all the buildings and where you enter. After you enter through security go to the immigration entrance, go past the first counter on the right, go through the door, and to the right you will see a counter. Go there and get your queue number with the section letter on it, L, and your queue number. Go to that section to the left from the counter, and sit down until your number is called. You should also have two bank letters, one stating it is your account, and another showing your deposit history covering the last two months at least.

Yes wanted TM30 for my marriage visa presume retirement is same