In accordance with a loyalty review program introduced by President Harry S. Truman in 1947, Moss was investigated by the loyalty board of the General Accounting Office in October 1949. The next year, when Moss was promoted to communications clerk at the Pentagon, she was reinvestigated by the Army's Loyalty-Security Screening Board. The result of this investigation was that Moss was suspended from her position with the recommendation that she be discharged. She appealed this decision and was cleared by the Army board in January 1951.