If his family offer an udhiyah on his behalf whilst he is on Hajj, does he have to offer another udhiyah?

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Check below answers in case you are looking for other related questions:
He forgot to fast the third day during Hajj and fasted it after he returned home
She thinks that some impurity got onto her clothes; Are her Hajj and prayer invalidated by that?

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Should he do ‘Umrah or spend the money on Jihad and propagating knowledge and on the poor?
Meaning of the hadeeth: “Whoever performs Hajj and does not commit any obscenity …”
A pilgrim died in ‘Arafah; is there any need to complete Hajj on his behalf or to do it all over again on his behalf?
He forgot to fast the third day during Hajj and fasted it after he returned home
She thinks that some impurity got onto her clothes; Are her Hajj and prayer invalidated by that?

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