Tripindi Shradha is a contribution to the memory of the departed. Tripindi Shradha means Pind daan of our last three generations who passed away. Tripindi shradha is also called Pitru Dosh. If anyone in the family from the previous three generations has passed away in a very young age or old age for that soul, we have to do the Tripindi Shradha. If the Tripindi shradha has not been made continuously for the last three years to the departed souls, then the dead get angry, so to calm them, we perform Tripindi Shradha. Tripindi Shradha is the pind daan of the forefathers of the previous three generations.