Yes, which is fantastic. Nonetheless, it is very formal, for example with letters being forced to do with legal issues. Significantly less official and much more typical is "Expensive Sir or Madam:" (Take note the use of the colon; "To whom it might issue:" also need to use a person). https://josuesvtnx.blogstival.com/58155463/the-5-second-trick-for-legal-notice-lawyer-karachi