Hajj on behalf of the mother before completing the Tawaf of Ifadah and the Sa'y of the previous Hajj

Question:
This questioner asks about a matter in Hajj. He says: A man performed Hajj ten years ago and did all the acts of Hajj except the Tawaf of Ifadah and the Sa'y of Hajj. This year he came to perform Hajj on behalf of his mother. Is his Hajj on behalf of his mother valid before he completes his first Hajj on behalf of himself?

Answer:
Yes, he performs Hajj on behalf of his mother. When he finishes the rites of the Hajj for which he entered the state of Ihram this year, he performs Tawaf and Sa'y for the past Hajj. He performs Tawaf and Sa'y for the past Hajj. Had he, before entering the state of Ihram for Hajj on behalf of his mother, come and performed Tawaf and Sa'y to complete the past Hajj, that would have been more preferable and better, and a way to avoid the difference of opinion. But since he entered the state of Ihram for Hajj on behalf of his mother and came as a pilgrim on behalf of his mother, he completes the Hajj on behalf of his mother. When he is done with it, he performs Tawaf and Sa'y for the past Hajj. Yes.