Rafael Nachman HaKohen was a Chassidic scholar and Kohen who corresponded with the Lubavitcher Rebbe, Rabbi Menachem Mendel Schneerson, regarding matters of Jewish law and spiritual practice, particularly those relating to the priestly blessing (Birkat Kohanim).
The correspondence between Rafael Nachman HaKohen and the Rebbe, as reflected in a letter dated 28 Tishrei 5712 (1951), centers on questions of intention and practice during Birkat Kohanim. The Rebbe addresses several halachic and spiritual queries raised by Rabbi HaKohen, including whether it is appropriate to have in mind individuals who have passed away during the priestly blessing. The Rebbe responds that it does not seem appropriate to direct Birkat Kohanim toward the deceased, distinguishing this from reciting Tehillim (Psalms) or verses at the end of the Shemoneh Esreh, where such intentions depend on the nature of the connection and heartfelt feeling.
The Rebbe also provides specific verses suitable for these prayers and requests that Rabbi HaKohen share the intentions in Birkat Kohanim that he had received from the previous Rebbe, Rabbi Yosef Yitzchak Schneersohn. The tone of the letter is warm and appreciative, with the Rebbe expressing gratitude for being included in Rabbi HaKohen's Birkat Kohanim and invoking the teaching that "one who gives a gift to his friend must inform him." The Rebbe concludes with blessings for health and nachas for Rabbi HaKohen and his family.