"The souls that say this chaplet will be embraced by My Mercy during their lifetime and especially at the hour of their death."
The Chaplet of Mercy is recited using ordinary rosary beads of five decades. It may be preceded by two opening prayers from the Diary of Saint Faustina and followed by a closing prayer ...
Begin the Chaplet with the Our Father, the Hail Mary and the Apostle's Creed:
The Apostle's Creed
I believe in God, the Father Almighty,
Creator of Heaven and earth;
and in Jesus Christ, His only Son, Our Lord,
Who was conceived by the Holy Ghost,
born of the Virgin Mary,
suffered under Pontius Pilate,
was crucified; died, and was buried.
He descended into Hell; the third day
He arose again from the dead;
He ascended into Heaven,
and sits at the right hand of God,
the Father Almighty;
from thence He shall come
to judge the living and the dead.
I believe in the Holy Spirit,
the holy Catholic Church,
the communion of saints,
the forgiveness of sins,
the resurrection of the body,
and the life everlasting. Amen.
Then, on the large bead before each decade:
I offer you the Body and Blood,
Soul and Divinity,
of Your Dearly Beloved Son,
Our Lord, Jesus Christ,
in atonement for our sins
and those of the whole world.
On the ten small beads of each decade, say:
For the sake of
His sorrowful Passion,
have mercy on us and on the whole world.
Holy Mighty One,
Holy Immortal One,
have mercy on us
and on the whole world.
(Say 3 Times)
Optional Closing Prayer
and the treasury of compassion inexhaustible,
look kindly upon us and increase
Your mercy in us, that in difficult moments
we might not despair nor become despondent,
but with great confidence submit ourselves
to Your holy will, which is Love and Mercy itself.
Our Lord said to Saint Faustina:
"Encourage souls to say the Chaplet which I have given you
... Whoever will recite it will receive great mercy at the hour of death ...
When they say this chaplet in the presence of the dying, I will stand between my Father and the dying person, not as the Just Judge but as the Merciful Savior ...
Priests will recommend it to sinners as their last hope of salvation. Even if there were a sinner most hardened, if he were to recite this chaplet only once, he would receive grace from my infinite mercy.
I desire to grant unimaginable graces to those souls who trust in My mercy ... Through the Chaplet you will obtain everything, if what you ask for is compatible with My will."
Taken with gratitude from http://www.catholicity.com/prayer/divinemercy.html