He is banned from travelling can he delegate someone to do Hajj on his behalf?
Question

                Is it permissible for me to do Hajj on behalf of my brother, as he is banned from travelling due to a case that happened twenty years ago, and the ban is still in effect up till now? We do not know when it will end and he is afraid that he may die without having done Hajj. Please note that his case has nothing to do with honour or trusts, rather it is a political case in which people with influence interfered to prevent the case being settled even though he is innocent and Allaah is Witness to that. He is now 56 years old.
Praise be to Allah.So long as your brother 
    hopes that he will be allowed to travel, and he will be able to do Hajj 
    himself, then he does not have the option of delegating someone else to do 
    Hajj on his behalf; rather he should be patient and wait, because delegating 
    someone else to do it is only allowed for the one who is unable to do it and 
    has no hope that the cause of his being unable will cease to apply. 
If it is decreed that he 
    die before that, there will be no sin on him because he is excused. In that 
    case, Hajj should be performed on his behalf with the expanses paid from his 
    estate, or someone may voluntarily do Hajj on his behalf. 
Ibn Qudaamah (may Allaah 
    have mercy on him) said: To sum up: if a person meets the conditions of Hajj 
    being obligatory, but he is unable to do it for some reason that he has no 
    hope will cease to apply, such as chronic sickness, or sickness for which 
    there is no hope of recovery, or he is physically weak and is not able to 
    sit firmly on his mount except with unbearable difficulty, or he is elderly, 
    if there is someone who can do Hajj on his behalf and he can afford to send 
    him on his behalf, then he must do that. This is the view of Abu Haneefah 
    and al-Shaafa’i. … If a person has hope that he will recover from sickness 
    or that his detainment will end, etc, then he does not have the right to 
    delegate someone else, and if he does that, it is not valid. This is the 
    view of al-Shaafa’i. That is because there is the hope that he will be able 
    to do Hajj himself, so he does not have the right to delegate someone else, 
    and it will not be valid if he does that. This is different from the one who 
    has no hope of recovery, because he is totally unable and has no hope of 
    being able to do it at all, and because the text speaks of doing Hajj on 
    behalf of an elderly man, who is one who has no hope of being able to do 
    Hajj for himself. No analogy can be made with that except in the case of one 
    who is like him. End quote from al-Mughni (3/91). 
Your brother comes under 
    the same ruling as one who is detained or imprisoned, as mentioned by Ibn 
    Qudaamah (may Allaah have mercy on him). 
And Allaah knows best.