When should I use Dear Sir or Madam?
It is generally best to adapt your greeting to the person you are addressing by using their name. If this isn’t possible, you can also use organization or department names or the person’s title.
Though it is somewhat impersonal and dated, “Dear Sir or Madam” can be used if you cannot find any information about the person you want to address.
Our sentence rephraser can help you vary your writing and express your intended meaning.