For more private communications

All letters written by soldiers were normally censored by their own officers, but they could request green Privilege (or Honour) Envelopes. These were not censored by their officers but by postal authorities in the rear areas, and allowed men to write of sensitive personal matters that they might not want their officers to know about.

Active Service Army Privilege Envelope, H.S. Bond, Canadian Army Overseas, to Mrs C. Bond, Regina, Saskatchewan, 21 January 1945

War, Memory and Popular Culture Archives - The University of Western Ontario - London, Ontario
envelope, 15.1cm x 10.1cm