Is it permissible to seek forgiveness for the deceased and ask his family and relatives to pardon him, and to give charity and recite the Qur’an with the intention that the reward reach him, and does that erase his sins and grant the doer a share of the reward?

Among the deeds that benefit a person after their death are the supplications of a righteous child, a brother, a relative, and a friend. This is always permissible, based on the Almighty's saying: "And those who came after them say, 'Our Lord, forgive us and our brethren who preceded us in faith,'" and the Prophet's (peace be upon him) saying: "Whoever seeks forgiveness for believing men and believing women, Allah will record for him a good deed for every believing man and believing woman."

It is recommended that you supplicate to Allah to expiate all the deceased's sins and ask those who knew him to forgive and pardon him if he fell short in their rights. You may give charity on his behalf, or perform Hajj, or Umrah (definition).

Scholars differed regarding the recitation of the Quran for the deceased. Ahmad, Abu Hanifa, and some companions of Al-Shafi'i held that the deceased benefits from it, while Malik and Al-Shafi'i maintained that it does not reach the deceased. It is preferable to seek forgiveness for the deceased and give charity on his behalf. You will have a reward for every good deed, and the deceased will have the reward of the dedication.