Just wanted to update on reqs for 1 year marriage extension in Chiang Rai. I went yesterday and received my one month under consideration stamp. - I’ve been on amnesty since June, prior to that 60 day extension when my non-o ME expired. 
 

Application (plus other forms they have you fill out there)
Passport
All visa pages pertaining to your original visa (each page on its own individual copy page)
Tm.6
Marriage certificate 
KR 2
Bank letter
Bank book 
Bank statements (had issue with updating bank book accurately but the bank printed out full statements proving 400k seasoned 2 months and this sufficed)
Wife ID
wife house book
Children birth certificate (if you have kids)
Children house book entries
Hand drawn map to house
Rental contract
House owner ID card
house owner housebook for rented house
Photo outside with house number
Photo in front of house
Photo in living room
Photo in bedroom (all photos need to be printed on their own individual paper)

 

2x copies of everything and they did a little interview with my wife and had her fill out a form regarding how we met. We had originals of everything but none were asked for. Every single page was signed and name also written out by myself and some by my wife as well. 
 

Money needs to stay in account during this under consideration period as well. 

Hope this can help someone.

Excellent report. Ta