	In June 2013 at a memorial service Mass held in Tamale it was announced that the cause for beatification would be initiated with the formal request lodged to the Congregation for the Causes of Saints on 15 June 2013. The "nihil obstat" (no objections) was declared on 13 July 2013 which allowed for Poreku to be titled as a Servant of God. The diocesan process commenced on 9 May 2015 in Tamale and was tasked with assembling documentation on his life and works as well as collecting testimonies from those who knew the late cardinal. As of June 2016 a total of 45 people had been interviewed as part of the process. Testimonies were heard in Tamale and Damongo as well as in Yendi and Navrongo-Bolgatanga with successive sessions to be heard in Wa.