How many days before applying for Non-O retirement extension in Chiang Mai can I get the bank letter and documents?

Remember in Chiang mai you can apply for an extension when you have 45 days or less left on your current stamp AND you don't lose any time applying early because the new extension is added to your current expiration date.

Here's the online appt link to Chiang Mai

https://bookings.cloud.microsoft/book/

I just checked and there are no openings this month or next month :(

Reports around Recently saying immigration in CM has required appointments now in advance

Bank book statements/ book update are Formally accepted up to 7 days

It I would go in and ask what they require or ask in a CM Expat group also for local info ?

At my immigration office they require that the 800 is in 2 months prior and 3 months after. They also like you to bank 100 baht or more on the day you get your signed statement, letter, and updated book, with a copy of the first page and the last page.

Don’t know if that helps anyone.

It sure helps at the bank if you deposit.

Also, they don’t mess about get extension and re entry visa immediately.

In Chiang Mai you can have the statement and bank letter dated up to 7 days before you apply for the extension.

You need to update the bank passbook the day you apply for the extension.

The seasoning for banked money method for retirement extension is you need the 800k in a thai bank account in your name only for 2 months before you apply for the extension, the 800k needs to stay in the account for 3 months after the extension is granted and then the balance cannot go below 400k the rest of the year.