Okay, there's some misinformation being shared
Despit what
@Chi***
, provided to the thai consulate at Savannakhet to get her Non-O visa, a LOT of that isn't required at all.
That a consulate takes documentation above and beyond what's required doesn't mean you needed to turn in that stuff. Thai officials LIKE paperwork so they're unlikely to give back anything extra you hand in.
In Savannakhet for a Non-Immigrant Type O visa based on marriage to a thai national (for foreign men or foreign women) you need;
copies of;
thai wife's thai i/d card (front & back on one page)
thai wife's house book listing
the two marriage certificates (Kor Ror 2 & 3)
the data page of your passport
You also need;
original rose bordered marriage certificate
two passport sized photos
your passport and the application for the visa.
Those things along with 2000baht will get you a 90 day single entry Non-O or pay 5000 baht and get a year-long, multi-entry Non-O
Your wife signs anything with her name on it, you sign anything with yours (meaning you BOTH sign the marriage certificate copies ;) )
Now those are NOT the things you need to go to the immigration office and get a yearly extension of stay from them so let's not get confused about that.