Hi Farid! As an addition to what's been said. It is idiomatic. стоить - to be worth It is the same word as in "сколько стоит?", which literally means "how much is it worth?" Now let's consider the idiomatic meaning: "вам\тебе не стоит" is a polite recommendation, "тебе не стоит курить" ~ you shouldn't smoke (lit. "it's not worth for you to smoke") "вам не стоит обращаться в посольство" ~ formal way to say "don't do it" (lit. it's not worth for you to go to the embassy) If I translate this into a human language, it will be something like "we're not going to consider your case if you go to the embassy before this date". Hope this helps!

Ранее этой даты вам не стоит обращаться в посольство. 1) It's a formal language: ранее этой даты = раньше этой даты = before (earlier) this day 2) не стоит делать что-то (например, обращаться, звонить, писать etc) means that you should not do something because you'll not get any result, it'll be a waste of time only. The phase means There is no sense to go to the embassy before the certain day. Earlier the certain day, there is no need to go to the embassy.