What are the requirements and guidelines for applying for a 1-year extension of a Non O marriage visa in Thailand?

Our photos were printed on photo paper.. ie. glossy.. and they rejected them at CM immigration.. telling us to have them photo copied onto A4 paper.. so best check what your specific immigration office wants!

𝗜𝗳 𝗜 𝗴𝗼 𝗲𝗮𝗿𝗹𝘆, 𝗹𝗲𝘁’𝘀 𝘀𝗮𝘆 𝟰𝟬 𝗱𝗮𝘆𝘀 𝗯𝗲𝗳𝗼𝗿𝗲, 𝗶𝘀 𝘁𝗵𝗲 𝘂𝗻𝗱𝗲𝗿 𝗰𝗼𝗻𝘀𝗶𝗱𝗲𝗿𝗮𝘁𝗶𝗼𝗻 𝗽𝗲𝗿𝗶𝗼𝗱 𝘀𝘁𝗶𝗹𝗹 𝟮𝟭 𝗱𝗮𝘆𝘀 𝗼𝗿 𝘁𝗵𝗲 𝗳𝘂𝗹𝗹 𝟰𝟬 𝗱𝗮𝘆𝘀?

Yep, it's 21 days and you get a stamp that says show up 3 weeks from the date you apply, you show up on that date and go to section L-2 to get the extension inked in

𝗜 𝗮𝘀𝘀𝘂𝗺𝗲 𝘁𝗵𝗶𝘀 𝗶𝘀 𝗷𝘂𝘀𝘁 𝘁𝗵𝗲 𝗽𝗿𝗶𝗻𝘁 𝗼𝘂𝘁 𝗼𝗳 𝗮𝗹𝗹 𝘁𝗵𝗲 𝗽𝗮𝘀𝘁 𝘁𝗿𝗮𝗻𝘀𝗮𝗰𝘁𝗶𝗼𝗻𝘀 + 𝘁𝗵𝗲 𝘀𝗶𝗴𝗻𝗮𝘁𝘂𝗿𝗲 𝗼𝗳 𝘁𝗵𝗲 𝗯𝗿𝗮𝗻𝗰𝗵 𝗺𝗮𝗻𝗮𝗴𝗲𝗿 𝗿𝗶𝗴𝗵𝘁?

No you need actually TWO separate things from the bank the "standard bank letter" (it usually is just a few lines, has your name, the account number and the balance of the account the day the letter was written

You need to have them give you a detail transaction report showing the last 3 months (they can print 3 months on demand at most banks). That's to show the balance of 400K was in the bank for the requisite 2 months before you apply for your extension

don't forget to update your bank book the date you apply so it shows the balance that day

𝘁𝗵𝗼𝘀𝗲 𝟲 𝗽𝗶𝗰𝘁𝘂𝗿𝗲𝘀 𝗼𝗳 𝗺𝗲 𝘁𝗼𝗴𝗲𝘁𝗵𝗲𝗿 𝘄𝗶𝘁𝗵 𝗺𝘆 𝘄𝗶𝗳𝗲 𝗵𝗮𝘃𝗲 𝘁𝗼 𝗯𝗲 𝘁𝗮𝗸𝗲𝗻 𝗮𝘁 𝘀𝗽𝗲𝗰𝗶𝗳𝗶𝗰 𝗹𝗼𝗰𝗮𝘁𝗶𝗼𝗻𝘀 𝘄𝗶𝘁𝗵𝗶𝗻 𝗮𝗻𝗱 𝗶𝗻 𝗳𝗿𝗼𝗻𝘁 𝗼𝗳 𝗼𝘂𝗿 𝗰𝗼𝗻𝗱𝗼?

You two standing in front of your address numbers, (sometimes in front of the building name if it's a big complex) you two sitting in the living room, sitting in the dining area, standing in the kitchen etc,

I'd take a bunch of different ones, print them out and let the immigration officer choose which ones they want on the application. Make sure they are "full body" shots (don't cut your legs off in the photos)