coaddressee

co- +‎ addressee

coaddressee (plural coaddressees)

1. Joint addressee.
   • 2019 April 5, Walter Benjamin, The Correspondence of Walter Benjamin, 1910-1940, University of Chicago Press, →ISBN, page 373:

     On the other hand, I would like to say something about the other letter, which I feel is to some extent also directed to me as coaddressee.

   • 2020 September 1, Ian W. Toll, Twilight of the Gods: War in the Western Pacific, 1944-1945 (Vol. 3) (The Pacific War Trilogy), W. W. Norton & Company, →ISBN:

     The urgent dispatch was addressed to Nimitz with MacArthur and King as coaddressees.