Pope Boniface VIII: “But this authority, although it be given to a man, and though it be exercised by a man, is not a human but a Divine power given by divine word of mouth to Peter and confirmed to Peter and to his successors by Christ himself, whom Peter confessed, even him whom Christ called the Rock.” (Unam Sanctam, n. 8)
Pope Boniface VIII: “Furthermore, that every human creature is subject to the Roman pontiff, — this we declare, say, define, and pronounce to be altogether necessary to salvation.” (Unam Sanctam, n. 9)
Fifth Lateran Council: “And since it arises from the necessity of salvation that all the faithful of Christ are to be subject to the Roman Pontiff, just as we are taught by the testimony of the divine Scriptures and of the holy Fathers, and as is declared by the Constitution of Pope Boniface VIII of happy memory, which begins ‘Unam Sanctam,’ for the salvation of the souls of the same faithful, and by the supreme authority of the Roman pontiff and of this Holy See, and by the unity and power of the Church, his spouse, the same Constitution, being approved by the sacred Council, we renew and approve.” (Pope Leo X, Fifth Lateran Council, Session 11, 19 December 1516)
First Vatican Council: “That which our Lord Jesus Christ, the Prince of shepherds and great Shepherd of the sheep, established in the blessed apostle Peter, for the continual salvation and permanent benefit of the Church, must of necessity remain forever, by Christ’s authority, in the Church which, founded as it is upon a rock, will stand firm until the end of time.” (First Dogmatic Constitution on the Church of Christ, chapter 2.)
First Vatican Council: “Therefore whoever succeeds to the chair of Peter obtains by the institution of Christ himself, the primacy of Peter over the whole Church.” (Ibid.)
First Vatican Council: “Therefore, if anyone says that it is not by the institution of Christ the Lord himself (that is to say, by Divine Law) that blessed Peter should have perpetual successors in the primacy over the whole Church; or that the Roman pontiff is not the successor of blessed Peter in this primacy: let him be anathema.” (Ibid.)
First Vatican Council: “And so, supported by the clear witness of Holy Scripture, and adhering to the manifest and explicit decrees both of our predecessors, the Roman Pontiffs, and of General Councils, we promulgate anew the definition of the Ecumenical Council of Florence, which must be believed by all faithful Christians, namely that the Apostolic See and the Roman Pontiff hold a world-wide primacy, and that the Roman Pontiff is the successor of blessed Peter, the Prince of the Apostles, true Vicar of Christ, head of the whole Church and father and teacher of all Christian people. To him, in blessed Peter, full power has been given by our lord Jesus Christ to tend, rule and govern the Universal Church.” (First Dogmatic Constitution on the Church of Christ, chapter 3.)
First Vatican Council: “Therefore we teach and declare that, by Divine ordinance, the Roman Church possesses a pre-eminence of ordinary power over every other Church, and that this jurisdictional power of the Roman Pontiff is both episcopal and immediate. Both clergy and faithful, of whatever rite and dignity, both singly and collectively, are bound to submit to this power by the duty of hierarchical subordination and true obedience, and this not only in matters concerning faith and morals, but also in those which regard the discipline and government of the Church throughout the world.” (Ibid.)
First Vatican Council: “This is the teaching of the Catholic Truth, and no one can depart from it without endangering his faith and salvation.” (Ibid.)
Therefore, all Catholic Christians who reject Pope Francis as the true Roman Pontiff, or who rejected his predecessor(s), or who will reject his successor(s), have committed an objective mortal sin and are automatically excommunicated.
Therefore, the followers of claimed visionary Maria Divine Mercy, if they reject Pope Francis as her messages tell them to do, or if they knowingly and willingly adhere to any of the heresies in her messages, are automatically excommunicated.