Answer
(Fatwa: 1149/866=H)
The views of Ulama are different about the second condition. One of the opinions is that the reward which is conveyed to the dead is distributed among them. In this case, your father will get less reward. While, the second opinion is that every dead is given full reward. The first opinion is based on justice while the second opinion is based on mercy. Allah’s treasures are inexhaustible; therefore we can expect from Him that he will give full reward to each. But, one should convey the rewards to his near and dear ones specially.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband