When writing to an unknown recipient, what is the proper form of address to the person?

If the person has a position that can be identified:

To the General Manager of the Hilton Hotel:

or

To the Chairman of the Board

or

To Accounts Receivable:

Or To Whom it May Concern, although that would be my last choice. It seems too impersonal.

I use Dear Sir or Madam,

The least descriptive option I can think of is “Dear literate entity”

I think “Dear Sir or Madam” isn’t really as formal as you think it is. When used in other context those words are often more formal, but in this instance, it’s a pretty standard phrasing, just like “ladies and gentlemen.”

RE: (the position held by the person you wish to reach)
To whom it may concern:

I have used just the word, Greetings,

Dear recipient.

Just say, “hello, my name is…..and I…