According to Tradition, after the Blessed Virgin Mary, Our Lady of the Rosary, commissioned St. Dominic to propagate her Psalter, her Holy Rosary in the 12 ^th Century, she revealed fifteen promises to him and later to Blessed Alan de la Roche in the 15 ^th Century that would be fulfilled for them, and all other Catholics, who faithfully practiced the Rosary.

1. Whosoever shall faithfully serve me by the recitation of the Rosary shall receive signal graces.
2. I promise my special protection and the greatest graces to all people who recite the Rosary.
3. The Rosary shall be a powerful armor against hell, it will destroy vice, decrease sin, and defeat heresies.
4. It will cause good works to flourish; it will obtain for souls the abundant mercy of God; it will withdraw the hearts of men from the love of the world and its vanities, and will lift them to the desire for eternal things. Oh, that souls would sanctify themselves by this means!
5. The soul which recommends itself to me by the recitation of the Rosary shall not perish.
6. Whosoever shall recite the Rosary devoutly, applying himself to the consideration of its Sacred Mysteries, shall never be conquered by misfortune. God will not chastise him in His justice, he shall not perish by an unprovided death; if he be just he shall remain in the grace of God, and become worthy of eternal life.
7. Whoever shall have a true devotion for the Rosary shall not die without the sacraments of the Church.
8. Those who are faithful to recite the Rosary shall have during their life and at their death the Light of God and the plenitude of His graces; at the moment of death they shall participate in the merits of the saints in paradise.
9.  I shall deliver from purgatory those who have been devoted to the Rosary.
10. The faithful children of the Rosary shall merit a high degree of glory in heaven.
11. You shall obtain all you ask of me by the recitation of the Rosary.
12. All those who propagate the Holy Rosary shall be aided by me in their necessities.
13. I have obtained from my Divine Son that all the advocates of the Rosary shall have for intercessors the entire Celestial Court during their life and at the hour of death.
14. All who recite the Rosary are my children and brothers and sisters of my Son Jesus Christ.
15. Devotion to my Rosary is a great sign of predestination.
 

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1. As a member, you are the beneficiary of the prayers of all the members of the Confraternity of the Most Holy Rosary, even after death.
2. You also receive the fruits of the prayers, Masses, and apostolic ministries of the Order of Preachers.
3. Moreover, various plenary and partial indulgences are made available to you. On the one hand, you receive a plenary indulgence under the usual conditions on the day of your enrollment (as indicated in the register and certificate), on the Feast Days of Christmas, Easter, the Annunciation, the Assumption, Our Lady of the Rosary, the Immaculate Conception, and Our Lord’s Presentation in the Temple. On the other hand, you also receive a plenary indulgence under the usual conditions by praying the Rosary in a Church or oratory, in a family, religious community, or in a pious association of the faithful. If not, the indulgence is only partial.

Concerning Indulgences: An indulgence is the remission of the temporal punishment due for sin whose guilt has already been forgiven. It is a partial indulgence if it frees you partially from the temporal punishment due for your sin, and plenary if it frees you completely. Both partial and plenary indulgences can be applied to the dead, but only by means of suffrage. Furthermore, you can only gain a plenary indulgence once a day, unless you are near death. Finally, these are the conditions that you are required to fulfill for receiving an indulgence: Sacrament of Confession, Holy Communion, prayer for the intention of the Pope, and freedom from all sin, even venial. If you are not detached from such sin, or if you have not fulfilled any of the other conditions, your indulgence is partial.