Consider the following choices. Self appointed, congregation appointed, state and national certification, or God certification. Considering the Differences. There is a considerable difference between a legally licensed minister and a person accepted by a congregation as a minister.
Marriages require state licensing.
Authority and certification are necessary to act for God. Priests were authorized. Jesus called them, did in fact certify them, there is a pattern. There is a universal claim by the Old Testament Apostles and Prophets as to how ministers were certified. Considering television evangelism, due to its profit and its influence this concept now is becoming obscured.