From this link:
Now, what does “to be sent” mean, except that someone in authority over you has conferred the privilege and authority upon you? In fact, it goes without saying that the one who confers the authority must be superior in authority to the one being commissioned, since no one can confer that which he does not possess himself.
In other words, a congregation’s vote cannot suffice, Scripturally speaking, to appoint a man as “pastor,” since the congregation (of inferior authority) cannot confer superior authority upon a man.
What is the Scriptural pattern for such things? This we can ascertain by observing the mission of Our Lord, Jesus Christ. It is a pattern of Divine Succession:
God the Father (the superior authority) sends Jesus Christ “…these very works which I am doing, bear me witness that the Father has sent me.” (John 5:36)
Jesus, in turn, sends the Apostles “…As the Father has sent me, even so I send you.” (John 20:21)
Jesus sends these Apostles “as the Father has sent me,” that is, in the same manner, with the same authority: “all authority.”
“All authority in heaven and on earth has been given to me.” (Matt. 28:18)
The Apostles, then, did not take their office and authority upon themselves, but were appointed by a Superior Authority, Jesus Christ. The Scriptures attest to the unique authoritative status of the Apostles in several ways
Scripture shows that only the Apostles are “entrusted” with the care of the Gospel message
Scripture also shows that only the Apostles refer to the Gospel message as their own personal possession
[N]o man can take the responsibility or title of “pastor” to himself. Rather, he must be sent by God, either indirectly (via succession), or directly (via extraordinary calling). If he claims the latter, his mission must be accompanied by miracles, signs and wonders as proof of his Divine vocation.
Even Jesus submitted to this proof-test: “If I bear witness to myself, my testimony is not true; there is another who bears witness to me, and I know that the testimony which he bears to me is true. You sent to John, and he has borne witness to the truth. Not that the testimony which I receive is from man; but I say this that you may be saved. He was a burning and shining lamp, and you were willing to rejoice for a while in his light. But the testimony which I have is greater than that of John; for the works which the Father has granted me to accomplish, these very works which I am doing, bear me witness that the Father has sent me.” (John 5:31-36)
I suspect these self-styled “Apostles” do not perform any miracles/signs/wonders.