Sure, that may be great. Nonetheless, it is rather official, by way of example with letters needing to do with legal matters. Less formal and much more typical is "Pricey Sir or Madam:" (note the usage of the colon; "To whom it may problem:" also really should use a person). https://stephenpfphb.tkzblog.com/36306904/getting-my-bail-lawyer-in-karachi-to-work