Question 20: My mother performed Hajj several years ago. On the Day of `Arafah (9th of Dul-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?
Answer: Assuming Ihraam (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… read more here.