Ah yes, it’s true. You have to wait at least 11 working days, but it’s easy, they don’t require any additional documents. In this case, it’s easier to apply from Cambodia.
You must stay in Cambodia for 10 days, but you don’t have to remain in one place. To prove your stay, you need to book a hotel for a few days. They will also check the entry stamp in your passport.
I had a similar situation, I guess, but I'm not sure if it was my fault or theirs. Anyway, I was applying for a DTV visa from Cambodia, and I received it with the wrong country in the passport section.
Yesterday, I came to Thailand for the first time on a DTV visa. They didn’t even look at my printout, he had all the details on their computer. What’s the point of printing it?