Is it permissible to perform Umrah and Hajj, establish prayer, pay Zakat, seek forgiveness, and give charity on behalf of a deceased person who neither prayed nor fasted, and used to drink alcohol?

A person who abandons prayer is either someone who denies its obligation, in which case he is a disbeliever by the unanimous agreement of scholars, and it is not permissible to show him mercy or seek forgiveness for him. Or he may have abandoned it out of negligence while acknowledging its obligatory nature, in which case there is a difference of opinion among scholars regarding his disbelief. According to the view that he is not deemed to have committed disbelief that expels him from the fold of Islam, it is recommended to seek forgiveness for him and invoke mercy upon him. It is also permissible to dedicate the reward of good deeds to him, such as charity, supplication, Hajj, and Umrah. However, praying on his behalf with the intention of making up for missed prayers is not valid. If it is with the intention of dedicating the reward, there is a difference of opinion regarding it, and the preponderant view is that it is permissible.