People ask for a check list for paperwork for their yearly extension of stay based on retirement.
It's hard to give a definitive one because of the individual quirks from each immigration office BUT this is 100% accurate as far as the Bangkok Immigration office
A filled out TM.7 Application for extension (the NEW version of the form printed on one piece of paper front & back) with your phone number written above your photo on the back side
Copies of;
-data page of your passport,
-ALL the stamps from your original Non-Immigrant visa and every extension up to the last one (if you changed passports you need that page where they moved your stamps to the new passport too).
-your most recent arrival stamp
-TM.6 departure card
-a hand drawn map of the area around where you live
FINANCIALZ
-bank letter (not more than 7 days old)
-copies of the front page of your bank book and at least pages that show 3 months of transaction history AND the last entry has to show the balance on the date you apply (it does NOT have to match the bank letter, it just has to be over the minimum amount needed)
OR
notarized affidavit of income from abroad letter from your
consulate
You'll need what I call the "three secret forms" (you can't down load them but I have them in the files section of the group); One is titled "statement" and is basically a self guarantee, one is the acknowledgement of overstay penalties, and the last one is the terms of your extension. Most people just sign them when the officer puts them in front of you and have no clue what they're signing. :O
IF you are using banked money there is an additional form that states you know you'll bank 800K for the 3 months before the application.
You sign the bottom of EVERY copy in blue ink.
You MAY need your lease agreement, the thai i/d of the lord, the blue house book listing for where you're renting and a TM.30 receipt <- if you're in an area that requires it.
I can say with 100% accuracy that is what's required in Bangkok because I just had three people use that exact paperwork this month and their extensions based on being over 50 sailed thru without them needing to sign anything OR even talk to the officer at all other than saying hello when they sat down.
Sorry this was long hopefully it was helpful.