If someone is appointed to perform Hajj for someone else and they are not able, they can appoint someone else to do it
Question :
Four years ago a person received some money from one of the pilgrims' guides (Mutawwif) to perform the pilgrimage for someone in a foreign land (outside of Saudi Arabia). However, he has not performed the obligation of Hajj for that person, as he needed the money and also due to his being lax about it. Now this person wants to perform the obligation of Hajj, as he is still responsible for it, but he cannot perform it due to his illness. However, he is prepared to pay the money and free himself of the responsibility. Also, this is while knowing that the Mutawwif who entrusted him to perform the Hajj is not present and he does not know where he is.
Answer:
If what occurred is like that which has been mentioned by the questioner, it suffices the mentioned person to pay the money to someone who is reliable in his religion and his trustworthiness to perform Hajj with it for the person who paid the money to him. This is due to Allâh's Statement:
"So fear Allah as much as you are able."
May Allâh help everyone to do what pleases Him. And peace be upon you.
Source:
Ash-Shaykh Ibn Baz
Fatawa Islamiyah, Vol. 4 Page 76