Of course, that is fine. On the other hand, it is extremely formal, for example with letters needing to do with legal matters. Fewer official and a lot more normal is "Dear Sir or Madam:" (note the usage of the colon; "To whom it might problem:" also really should use https://brooksexuoo.alltdesign.com/best-advocate-for-family-case-in-karachi-secrets-55478382