Deputizing someone to perform Hajj on behalf of a husband on the Day of `Arafah

Q 5: My mother performed Hajj several years ago. On the Day of `Arafah (9th of Dhul-Hijjah) she deputized someone to perform Hajj on behalf of my late father, as he did not perform Hajj during his lifetime. Is this a complete Hajj? The person began performing the Hajj from `Arafah. Is it permissible for us to perform another Hajj to be sure about it?

A: Assuming Ihram (ritual state for Hajj and ‘Umrah) on the Day of ‘Arafah, whether at `Arafah or other areas by the person deputized to perform Hajj on behalf of your father is valid. If the person who performed Hajj on behalf of your father had previously performed Hajj for themselves and completed the rites of Hajj without doing anything to render the Hajj invalid, it would count as sufficient valid Hajj for your father. Therefore, you are not required to perform Hajj again on his behalf to be sure. However, if your mother wants to perform another Hajj for your father, it is permissible for her to do so and she will be rewarded for it.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.