In August 1942, the nuncio disputed Marshal Pétain's claim that Pope Pius XII understood and approved of France's increased hostility towards the Jews. He was awarded the Grand Cross of the Légion d'honneur upon leaving France in 1944 to again work in the Secretariat of State, specifically the Congregation for Extraordinary Ecclesiastical Affairs. After becoming President of the Central Committee for the Holy Year on 28 June 1948, Archbishop Valeri was made assessor of the Sacred Congregation for the Oriental Churches on 1 September of that same year.
In August 1942, the papal representative disputed Marshal Pétain's statement that Pope Pius XII had consented to and supported France's increased hostility towards Jews. He was honored with the Grand Cross of the Légion d'honneur in 1944 as he left France to return to work within the Vatican's Secretariat of State, specifically in the Congregation for Extraordinary Ecclesiastical Affairs. Following his election as President of the Central Committee for the Holy Year on June 28, 1948, Archbishop Valeri was appointed assessor of the Sacred Congregation for Oriental Churches on September 1 of that year.