If you're coming to Thailand, get used to things not making sense. And get used to different offices of the same branch of government 'interpreting' laws and regulations differently.
it's my understanding that Thai taxes are based on money remitted to Thailand only, and not worldwide income, but they are considering adding the worldwide income aspect.
Anonymous participant to the local immigration office where you're staying. When I got a new passport, I actually paid an agent to do this. I don't usually pay an agent. They took both my passports down and had the immigration office take care of it.
he simply asked an immigration officer what would be required for extending in country. The officer replied that you'd have to again show financials and other documents and suggested briefly going out of the country was a better alternative.
I think the part about the affidavit isn't accurate. I'm from a country that doesn't provide it, and I do the monthly transfer method. Why would they need an affidavit if the actual money is coming in?