I'm about 14 days away from applying for my Non-O retirement extension in Chiang Mai. Anyone know how long before that date that Immigration will accept my dated "Letter of Income" from the Canadian Consulate in Chiang Mai? Is that even clear?

I've read they can be picky about the dates of bank statements for you 800K folks right to the date of extension application and I don't want to get the letter too early.

Cheers!