In this opportunity, I would like to discuss about the title above that I think it is necessary to. Giving a question like;
your name please ..?
what's your name?
without using an auxilliary is permitted. This is used specially in free or daily conversation as well as in few formal situation ...
To say it, we need to cut one or more words. for example;
What's (what is) your name?
=> your name?
That will be more politely when we add the word "please" in the end of the question, like; your name, please?.
Let's learn more about that.
In the sentence above we cut the question word which is important to be used to make clear of the meaning. Besides, we also omit the word "is" as structural-meaning verb. This is probably good in some case but all depends on the situation. I mean that the situation supports the questions.
Situation here is contextual. There has been other expression preceding.
Guess : Good morning, madam
Receptionist : good morning. What can I do for you?
Guess : I want to book a single bed room for february 21 to 26.
Receptionist : Your name please?
Guess : William. William hendric
Receptionist : Would you like to complete the reservation form, mr hendric?
Guess : Sure.
In the context above, we can see that the situation is in a hotel. This happens when mr hendric would like to book a room in the hotel. This could be a routine activity in a hotel and, by saying or asking about name is one of the most important thing when someone, say, a guess books a room at a hotel.
Without considering the situation, the question (by cutting one or more words) will be clumsy.
Situation = In a airport.
Passenger 1 : (... sitting in a waiting-room) ... your name, please?
Passenger 2 : (... sitting in the same place) .... ?#(mailto:%5EB%5E&@%5E#$&^
Finally, to cut one or more words in a question should see and consider the situation that affects it.