 The informative process for the sanctification cause commenced in Como on 1 February 1923 and had been tasked in compiling available evidence and documentation that could establish both a biographical profile and reasons that would attest to the late priest's saintliness; the process closed on 21 May 1929.Theologians compiled all of his writings and were assigned to ascertain whether or not his texts were in line with the magisterium of the Roman Catholic Church; the team approved them all in a decree of 12 July 1932.The formal introduction of the cause came on 15 March 1939 - during the pontificate of Pope Pius XII - in which the honorific title of Servant of God was granted to Guanella as the first official stage in the process.