Indeed, that's wonderful. On the other hand, it's very official, as an example with letters having to do with legal issues. Much less official and a lot more common is "Dear Sir or Madam:" (Take note the use of the colon; "To whom it may worry:" also really should use https://corporatelawyerkarachi41691.uzblog.net/everything-about-civil-lawyer-in-karachi-50199379