What is the difference between performing Hajj for oneself and performing Hajj on behalf of another?

Question : What is the difference between a person who performs Hajj for himself and a person who performs Hajj for someone else, in terms of intention, words, and actions?

Answer : There is no difference between them except that the one who performs Hajj for another says "Labbaik (I am here to answer your call)" on behalf of so-and-so and intends it for him, whereas the one who performs Hajj for himself says "Labbaik" and intends that he is answering the call for himself. Therefore, it is recommended for the one who has been entrusted to perform Hajj for another not to restrict his supplication to himself alone, but rather to supplicate for himself and for the one who entrusted him with performing Hajj on his behalf.