Baptisms conferred with arbitrarily modified formulas are not valid
… The Sacrament of Baptism administered with an arbitrarily modified formula is not valid
… those for whom “baptism” was celebrated in this way must be baptized “in forma absoluta” — that is unconditionally — by repeating the rite according to the liturgical norms stipulated by the Church
… “the deliberate modification of the sacramental formula was introduced to emphasize the communitarian significance of Baptism”
…“when one baptizes it is really Christ himself who baptizes”
… “the ancient temptation to substitute for the formula handed down by Tradition with other texts judged more suitable”
… “modifying on one’s own initiative the form of the celebration of a Sacrament does not constitute simply a liturgical abuse
… invalid the Sacrament itself, because the nature of the ministerial action requires the transmission with fidelity of that which has been received”
Congregation for the Doctrine of the Faith