After the 20th Congress of the Communist Party of the Soviet Union (February 1956), Cohen's son filed an appeal to review her case. On 18 July 1956 the General Secretary of the Communist Party of Great Britain, Harry Pollitt sent a letter to the First Secretary of the Communist Party of the Soviet Union, Nikita Khrushchev with a request to clarify the situation with the arrest of Rose Cohen in 1937 and asking what had happened with her after the arrest.