For those who are interested:

I. On All Souls’ Day (Nov. 2) a plenary indulgence, applicable only to the Poor Souls, is granted to those who visit any parish church or public oratory and there recite one Our Father and one Creed.

II. On all the days from November 1 through November 8 inclusive, a plenary indulgence, applicable only to the Poor Souls, is granted to those who visit a cemetery and pray, even if only mentally, for the departed.

Conditions for both indulgences:

1. Only one plenary indulgence can be gained per day.
2. It is necessary to be in the state of grace, at least by completion of the work.
3. Freedom from attachment to sin, even venial sin, is necessary; otherwise the indulgence is only partial. (By this is meant attachment to a particular sin, not sin in general.)
4. Holy Communion must be received each time the indulgence is sought.
5. Prayers must be recited for the intentions of the Holy Father on each day the indulgence is sought. (No particular prayers are prescribed. One Our Father and one Hail Mary suffice, or other suitable prayers.)
6. A sacramental confession must be made within 20 days of completion of the prescribed work. (One confession within the 20 days, made with the intention of gaining all the indulgences, suffices.)

ALSO SEE:

Month of November: Prayers for the Poor Souls in Purgatory – Compiled by A Soul – MaryRefugeOfSouls
https://maryrefugeofsouls.com/2023/10/31/month-of-november-prayers-for-the-poor-souls-in-purgatory-compiled-by-a-soul-maryrefugeofsouls/