Each V-Mail letter sheet contained printed instructions to help writers avoid illegible messages or misaddressed mail. Because V-Mail did not require an envelope, the instructions stressed that each letter show complete sender and receiver addresses. The instructions reminded writers that V-Mail’s microfilm processing was unable to print faint or blurry writing. Small penmanship was also discouraged and all letters needed to be printed clearly by pencil, pen, or typewriter. After all, the V-Mail facsimiles (photographic print letters) were smaller than the real thing; anything challenging to read at 100 percent size could be rendered illegible at one-quarter size.
As part of a national security measure, each outgoing letter, whether regular mail or V-Mail, which passed through military post offices was carefully censored for confidential material. Locations of companies or units, descriptions of military operations, and other sensitive information, were blacked out or removed, and sometimes the letters were confiscated. Letter writers were aware of these procedures but often expressed their concerns or frequently joked about their letters being read by a third party. See the two below images about censorship.