Does the one who gives charity on behalf of his father receive the reward for that charity, and become a partner with him in the recompense?

If you are digging a charity well on behalf of your father, and the son contributes a share to the well for himself and his siblings, this is a good deed and an act of filial piety towards the father, and he will receive the reward of charity. As for the son and his siblings, the reward of charity on behalf of the father is a matter of scholarly disagreement: whether they receive only the reward for filial piety and beneficence, or also the reward for charity.