Court case in the Supreme Court of South Africa, with First Respondent J. de Villiers Louw, Liquidator: Act 44 of 1950, and Charles R. Swart, Minister of Justice. Kahn challenged the notice served on him by the respondents to show why is name should not be included in a list of persons who are office bearers or members of the Communist Party of south Africa, which he received on the 6 September 1950, at which point in time the Communist Party had been dissolved as of the 22 June 1950.

Included are Petition; Annexures with the initial notice served; Legal Opinion; Affidavits by amongst others Moses Kotane and Yusuf Dadoo; Affidavits by Louw and Jacobus Malan Hugo, Clerk in the House of Assembly; the Argument; Judgement delivered on the 17 November 1950.