to whom it may concern

Idioms  

1. To the appropriate recipient for this message, as in I didn't know who was responsible for these complaints so I just addressed it “to whom it may concern.” This phrase is a formula used in letters, testimonials, and the like when one does not know the name of the proper person to address. [Second half of 1800s]

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Example Sentences

One letter is addressed to Fine and the other "to whom it may concern."

From Newsweek • Jan. 15, 2012

Showed to whom it may concern that venerable age may be criticised without discourtesy, and high position attacked without insolence.

From Punch, or the London Charivari, Vol. 105, September 2nd, 1893 by Various

I submit the question to whom it may concern.

From The Glow-Worm and Other Beetles by Teixeira de Mattos, Alexander

He handed over Benjamin Wade's letter of introduction, "to whom it may concern."

From Every Man for Himself by Moorhouse, Hopkins

Patriotically insisted upon meeting four times a week, to show, to whom it may concern, that at least they are ready for work.

From Punch, or the London Charivari, Vol. 105, August 5th 1893 by Various