The members of the tribunal are appointed by the bishop for the ministry
of justice according to the Catholic Church's canon law.
Certain violations of Church law are adjudicated. The principal responsibility is investigation and decision concerning declaration of invalidity of marriage and dissolution of the marital bond.
A Church Decree of Invalidity is a declaration from the Catholic Church that a particular union, presumably begun in good faith and thought by all to be a marriage, was in fact an invalid union. The purpose of such ecclesiastical processes is to serve one's conscience and spirit, to clarify a person's status before the Church regarding marriage, and to reconcile persons to full sacramental participation in the community of the Church.