What documents and requirements are needed for a Non-OA visa extension based on marriage in Thailand?

sadly

@Daniel *********

that was a false impression, you need all new photos, and you'll get the 30 day under consideration stamp when you apply.

It'll be up to the immigration office whether they come to your house or not for the in home visit.

As Ellie said, EVERY year extension is a brand new application (seeing as you can't get an extension for more than a year) so each one is treated as "new"; requiring all new documentation, bank, letters, updated bank book, yearly transaction history, photos , copies, etc The might might even erquire you to update your Kor Ror 2 <- the certificate from the Amphur that states you're still married.

Surely the non OA is for retirement.

You should have entered on Non-O, not Non-OA (long-stay) visa if you applied for the first extension based on being married to a Thai.

Here are the COMMON things that would be asked for an extension based on marriage. But requirements vary at each immigration office, you need to go to the local immigration office to get the latest and their specific requirements handout.

Every extension is a new extension every year, and you will be stamped for the under-consideration period. Usually, you will have the IO visit or witness interview during U/C, as same as last year.