I went to the amphur on sukhumvit 54 yesterday, and had all the papers I needed. But was told I couldn't register the marriage because the letter from my embassy (the one I got translated and legalized for over 3000 baht) was not approved because it was missing how much money I make every month/year. I have never heard about someone have to prove that?

Have anyone experience about this and can recommend a amphur in bangkok that not has retarded staff ?

Over and out.

Daft as it is, for some reason it is still a requirement and the fault lies with your embassy or translation agency for not providing that information. They can state your income is zero, but it must give that information.