"Do you recognize me?"
Translation:Est-ce que vous me reconnaissez ?
If you are trying to ask why it's "vous" instead of "tu" I have an answer. So generally we use "vous" as a replacement for "tu" when it said to a person with higher authority, a person you respect, a stranger, and especially to readers (who is basically a stranger). It is mainly a way to say "you" in a formal version. If that is not what you were asking for, well now you know.