Tripindi pooja is the pooja performed to bring peace to the soles of ancestors of three generations. This pooja will free the soles of the ancestor who may have died at very young age or in case if the shraddha rituals were not followed from 3 years. This will calm such discontent soles and free person from troubles caused by them.
When any person dies early his/her wishes remains discontent which makes them restless which causes villenage bondage creating troubles for us if all rituals and Shraddha are not performed. This pooja will set such sole to peace and direct them to the path of salvation.
Anyone can perform this pooja except single women if there is a presence of Pitra dosha in birthchart.