The resignation letter is only a formality. In contrast, under typical garden leave provisions, employees must give advance notice of their resignation, typically between 30 and 90 days' notice.It arrays in a proper and dignified manner the important facts regarding the ancestry, personal careers and matrimonial alliances of those who, in each. (ii) a signed, notarized letter of resignation from the outgoing corporate official(s) or authorized person(s); and. A wellrespected officer in the army and an opponent of secession, he chose to resign from the US Army after Virginia seceded from the Union.