A question needs an answer and a question mark at the end. A request doesn’t need an answer, so it isn’t a question. Don’t use question marks for requests.
Decide if you want or need an answer.
- Can you please give me five copies of this article. (request)
- Did you write this article? (Question, so I need an answer.)
- Would you kindly fill out this application form.
- Do you have any application forms?