"When a person dies, they do not go straight to heaven, unless they are Saints on Earth. You are doing a great evil to your love ones, if you don't pray for them. Do not say, my relative is in heaven now! No they are not. If they are Catholic and died with confession they went to Purgatory. It is your obligation to make sure that person receives the last Sacraments, and your obligation if you truly love them, to pray so they may get out of the fires of Purgatory soon.
A Holy Mass once a year, its cruel! Once a Month is not any better. Think of your time, how will you like people to pray for you? Remember one second in Purgatory feels like years. Pray and say many Masses for your love ones. No One goes to heaven not pure. I come to tell you that they suffer in Purgatory, that they weep, and that they demand with urgent cries the help of your prayers and your good works.
I seem to hear them crying from the depths of those fires which devour them: "Tell our loved ones, tell our children, tell all our relatives how great the evils are which they are making us suffer. We throw ourselves at their feet to implore the help of their prayers. Ah! Tell them that since we have been separated from them, we have been here burning in the flames!" "
-- Saint John Marie Baptiste Vianney
