What is the required monthly income for a Thai Marriage Visa: 40,000 baht or 65,000 baht?

@Ian *******

Sadly that’s correct, US, UK and AUS stooped issuing affidavit letters in 2018.

Jan Kenneth Nesland It's not sad at all. Immigration told theses three countries embassies in Bangkok to come up with an income letter before the end of 2018 that showed a documented income from authorities back home. They said,it wasn't possible. Immigration asked them why most European embassies/consulates were able to do it. I guess they didn't have an answer to that.

@Max ************

Ok, our Norwegian embassy in Bangkok just verifies our own documents from two sources; pension provider or the tax authorities at home.

@Jan *****************

Yes, that's about the same sources most European embassies and consulates which issues income letters uses. That's how it's supposed to work.