If someone performs Hajj on behalf of another, should he mention that person’s name during talbiyah?

Hasan says that if you say once, "I recite the Talbiyah on behalf of so-and-so," then it will be sufficient on your behalf.

It is narrated in the same manner from Hazrat Ata as well.

Hazrat Mujahid says that the Companions believed that when departing from the place of Arafat, forgiveness and mercy descend.