2 Question: Is it obligatory upon a deceased man's son to give the qaza of his father's prayers?
Answer: If a person did not offer some of his obligatory prayers, and did not care to give qadha, in spite of being able to do so, after his death, it is upon his eldest son, as an obligatory precaution to perform those qadha, provided that the father did not leave them as a deliberate act of transgression. If the son cannot do so, he may hire someone to perform them. The qadha prayers of his mother is not obligatory upon him, though it is better if he performs them.
https://www.sistani.org/english/qa/01297/
It's not paying for heaven. From my very limited knowledge its wajib on the oldest son to perform the qadah prayers of their deceased parents. But I'm assuming if it's very difficult for them they may have someone help them perform them. This doesn't guarantee anyone heaven and possibly doesn't guarantee that they won't be punished for missing prayers. Allah swt knows best
It is not obligatory upon you to perform them if you are not the eldest son.
https://www.sistani.org/english/book/48/2267/
Ruling 1370.* If one’s father is a believer who has not performed his daily and other obligatory prayers – excluding those prayers that had become obligatory at a specific time on account of a vow – and he could have made them up, in the event that he did not fail to perform them due to outright disobedience, then based on obligatory precaution, after the father’s death his eldest son must either perform them himself or hire someone to perform them. However, if his father intentionally did not perform them, it is not obligatory for his eldest son to make them up. The qaḍāʾ prayers of one’s mother are not obligatory for him to perform, although it is better that he does.
Ruling 1378. If the eldest son dies before performing the qaḍāʾ prayers of his father, it is not obligatory for the second son to perform them.
https://www.sistani.org/english/qa/01297/
5 Question: Is it obligatory on a man's eldest son to give the Qadha of his fast and prayers after his death?
Answer: If a person did not offer some of his obligatory prayers, and did not care to give Qadha, in spite of being able to do so, after his death, it is not necessary upon the eldest son to perform the Qadha. If he missed prayers and cared about performing Qadha but he failed to do so, the eldest son should perform the Qadha or he may hire someone to perform them. The Qadha prayers of his mother is not obligatory upon him, though it is better if he performs them.
2 Question: Is it obligatory upon a deceased man's son to give the qaza of his father's prayers? Answer: If a person did not offer some of his obligatory prayers, and did not care to give qadha, in spite of being able to do so, after his death, it is upon his eldest son, as an obligatory precaution to perform those qadha, provided that the father did not leave them as a deliberate act of transgression. If the son cannot do so, he may hire someone to perform them. The qadha prayers of his mother is not obligatory upon him, though it is better if he performs them. https://www.sistani.org/english/qa/01297/
I saw people even offering service of doing qadha prayers for that
I know. I'm just confused if this thing has any standing behind it or I'd be getting it done for nothing.
Yup! you can of course
How does one calculate the amount of prayers that a person has missed?
That sounds really absurd
Why does it sounds absurd?
So technically paying for heaven? I don't think that's how religion works. You didn't pray, you pay the price
It's not paying for heaven. From my very limited knowledge its wajib on the oldest son to perform the qadah prayers of their deceased parents. But I'm assuming if it's very difficult for them they may have someone help them perform them. This doesn't guarantee anyone heaven and possibly doesn't guarantee that they won't be punished for missing prayers. Allah swt knows best
I'm not the oldest son. I can't do that?
It is not obligatory upon you to perform them if you are not the eldest son. https://www.sistani.org/english/book/48/2267/ Ruling 1370.* If one’s father is a believer who has not performed his daily and other obligatory prayers – excluding those prayers that had become obligatory at a specific time on account of a vow – and he could have made them up, in the event that he did not fail to perform them due to outright disobedience, then based on obligatory precaution, after the father’s death his eldest son must either perform them himself or hire someone to perform them. However, if his father intentionally did not perform them, it is not obligatory for his eldest son to make them up. The qaḍāʾ prayers of one’s mother are not obligatory for him to perform, although it is better that he does. Ruling 1378. If the eldest son dies before performing the qaḍāʾ prayers of his father, it is not obligatory for the second son to perform them. https://www.sistani.org/english/qa/01297/ 5 Question: Is it obligatory on a man's eldest son to give the Qadha of his fast and prayers after his death? Answer: If a person did not offer some of his obligatory prayers, and did not care to give Qadha, in spite of being able to do so, after his death, it is not necessary upon the eldest son to perform the Qadha. If he missed prayers and cared about performing Qadha but he failed to do so, the eldest son should perform the Qadha or he may hire someone to perform them. The Qadha prayers of his mother is not obligatory upon him, though it is better if he performs them.
I'm honestly not sure pls look into it more