Via CNA:
The Vatican’s doctrinal office said Tuesday the titles of “Co-Redemptrix” and “Mediatrix” are not appropriate ways to describe Mary’s participation in salvation.
In “Mater Populi Fidelis” (“The Mother of the Faithful People of God”), the Dicastery for the Doctrine of the Faith (DDF) said when an expression requires frequent explanation to maintain the correct meaning, it becomes unhelpful.
“In this case, the expression ‘Co-redemptrix’ does not help extol Mary as the first and foremost collaborator in the work of Redemption and grace, for it carries the risk of eclipsing the exclusive role of Jesus Christ,” according to the doctrinal note, released Nov. 4.
Pope Leo XIV approved the document — signed by DDF prefect Cardinal Víctor Manuel Fernández — on Oct. 7.
Mary’s contribution to human salvation, specifically the title of “Co-Redemptrix” (“Co-Redeemer”) has been a point of theological debate for decades — with proponents calling for Mary’s role in redemption to be declared a dogma but critics saying it exaggerates her importance and could damage efforts for unity with other Christian denominations.
For more: Read the complete note, “Mater Populi Fidelis”
In a preface to the note, Fernández wrote that the document responds to questions the dicastery received in recent decades about Marian devotion and certain Marian titles, and clarifies which are acceptable.
“There are some Marian reflection groups, publications, new devotions, and even requests for Marian dogmas that do not share the same characteristics as popular devotion,” the cardinal wrote, adding that some Marian devotions, expressed “intensely through social media,” can sow confusion among Catholics.
“This text also aims to deepen the proper foundations of Marian devotion by specifying Mary’s place in her relationship with believers in light of the Mystery of Christ as the sole Mediator and Redeemer. This entails a profound fidelity to Catholic identity while also requiring a particular ecumenical effort,” Fernández wrote.
In addition to “Co-Redemptrix,” the document also addressed at length the Marian title “Mediatrix” or “Mediatrix of All Graces,” analyzing related Church teaching on Mary’s role as intercessor.
The DDF concluded that, “some titles, such as ‘Mediatrix of All Graces,’ have limits that do not favor a correct understanding of Mary’s unique place.”
The dicastery encouraged the use of other expressions for Mary, specifically titles referring to her motherhood, including “Mother of God” and “Mother of the Faithful People of God.”
A little history, from our friends at Wikipedia:
The concept was especially common in the late Middle Ages, when it was promoted heavily among the Franciscans, and often resisted by the Dominicans. By the early 16th century the hopes of the concept becoming Catholic doctrine had receded, and have never seriously revived. In more recent times, the title has received some support from the Catholic Magisterium though it is not included in the concluding chapter of the apostolic constitution Lumen gentium of the Second Vatican Council, which chapter many theologians hold to be a comprehensive summary of Catholic Mariology.
In the year of 1913, the Pope granted an indulgence to those who recited a prayer containing the following passage: I bless thy holy Name, I praise thine exalted privilege of being truly Mother of God, ever Virgin, conceived without stain of sin, Co-Redemptrix of the human race. The prayer is found in the Raccolta of 1950 with Vatican approval.
However, when still just a cardinal, Pope Benedict XVI said that the Marian title caused confusion and did not sufficiently reflect scripture. Pope Francis repeatedly said the title should not be used.

