Parents Died Without Performing Hajj
If a person's parents die before performing Hajj even though they were eligible to do so long time before their death, what can the person do for them?
He should pray for them and ask Allah to forgive them and then to perform the Hajj on their behalf, though some of the Ulama' like imam Malik say, "No, you are not allowed", but Insha’Allah the opinion of the Jumhur is the strongest, so he should perform the Hajj on their behalf.
Can you make someone else do it? Yes, any Muslim can do it, providing that he/she already performed Hajj. So if the person hasn’t performed the Hajj, he can not do the Hajj on behalf of someone else.
Sheikh Salem Al-Amry