By the practice of Indulgences, the Church places at the charitable disposal of the faithful the inexhaustible treasure accumulated, from age to age, by the superabundant satisfactions of the saints, added to those of the martyrs, and united to those of our Blessed Lady and the infinite residue of our Lord’s sufferings. These remissions of punishment she grants to the living by her own direct power; but she nearly always approves of and permits their application to the dead by way of suffrage, that is to say, in the manner in which, as we have seen, each of the faithful may offer to God who accepts it, for another, the suffrage or succour of his own satisfactions.
The Liturgical Year, Abbot Gueranger O.S.B.
A partial indulgence can be obtained by devoutly visiting a cemetery and praying for the departed, even if the prayer is only mental. One can gain a plenary indulgence visiting a cemetery each day between November 1 and November 8. These indulgences are applicable only to the Souls in Purgatory.
A plenary indulgence, again applicable only to the Souls in Purgatory, is also granted when the faithful piously visit a church or a public oratory on November 2. In visiting the church or oratory, it is required, that one Our Father and the Creed be recited.
A partial indulgence, applicable only to the souls in purgatory, can be obtained when the Eternal Rest (Requiem aeternam) is prayed. This is a good prayer to recite especially during the month of November:
Eternal rest grant to them, O Lord, and let perpetual light shine upon them. May the souls of the faithful departed, through the mercy of God, rest in peace. Amen.
To learn more about purgatory, check out these articles on Ascension’s Great Adventure Blog: Furnace of Divine Love: