Working for mail companies that transport parcels that may be both permissible and haraam
Question

                My question is whether it is permissible to earn a living by delivering mail such as FedEx or DHL, where the work involves working in a warehouse to organize parcels and boxes so that they can be picked up and put into special vehicles to be delivered to customers. There may be a problem in that I (as a worker) have no control over what is inside the parcel or box, as it may be halaal or haraam. What is the ruling on a worker entering such a job, which is like delivering mail, but I will be dealing with parcels.
Praise be to Allah.
      It is permissible to work in companies that deliver mail 
      and parcels, if the material being distributed is permissible. As for 
      haraam material such as alcohol, cigarettes, riba-based contracts and so 
      on, it is not permissible to transport them or record them, or to help 
      with them in any way, because that comes under the heading of helping 
      others with sin, and Allah, may He be glorified and exalted, says 
      (interpretation of the meaning):  

    “Help you one another in Al‑Birr and At‑Taqwa (virtue, 
    righteousness and piety); but do not help one another in sin and 
    transgression. And fear Allaah. Verily, Allaah is Severe in punishment”

    [al-Maa’idah 5:2]

    This ruling is connected to knowing that there is something 
    haraam inside the parcels, such as knowing that the parcel contains alcohol 
    or cigarettes. But if it is not known what the parcels contain, there is 
    nothing wrong with transporting them, organizing their movements and so on, 
    because the basic principle is that it is permissible, unless it is the case 
    that with some of the people from whom you pick up parcels, most of the time 
    they contain haraam things, in which case it is not permissible to pick up 
    parcels from them, based on what is likely to be the case.  

    It says in Kashshaaf al-Qina‘ (3/559): It is not valid to 
    hire oneself out to carry dead meat and the like for people to eat who are 
    not forced to do so, because that is helping in sin; but if it is being 
    carried to people who are forced to eat it, then it is valid. It is not 
    valid to hire oneself out to carry alcohol to those who will drink it, 
    because the Prophet (blessings and peace of Allah be upon him) cursed the 
    one who carries it and the one to whom it is carried. And no wage is to be 
    paid to him, i.e., to the person who is hired to do something haraam, 
    because of the reasons stated above. End quote. 

    The Standing Committee for Issuing Fatwas was asked: I work 
    in the mail and transportation field. I work as a driver, distributing 
    letters and so on to postal centres. In these bags in which the letters and 
    so on are carried, there are occasionally glass bottles of alcohol which 
    come from foreign countries. I do not know exactly where and when I am 
    carrying these bottles of alcohol, because they come from abroad wrapped up 
    inside the bags. I found out about that from a friend of mine. The 
    transportation company has other centres which specialize in other things, 
    such as transporting telephone equipment, wireless equipment, and other 
    things. Please advise me: can I do this job without there being anything 
    wrong, or should I resign or move to another centre in the mail and 
    transportation field, such as the telephone centre and so on? 

    They replied: It is not permissible for you to transport the 
    haraam things that come in the mail to other people if you know about them, 
    because that is helping in sin, and Allah says (interpretation of the 
    meaning):

    “Help you one another in Al‑Birr and At‑Taqwa (virtue, 
    righteousness and piety); but do not help one another in sin and 
    transgression”

    [al-Maa’idah 5:2]. 

    You have to look for another job, or move from this job to a 
    place where nothing haraam is done. May Allah make things easy for you and 
    help us all to do that which pleases Him. And Allah is the Source of 
    strength. Blessings and peace of Allah be upon our Prophet Muhammad and his 
    family and Companions. End quote. 

    Shaykh ‘Abd al-‘Azeez ibn ‘Abd-Allah ibn Baaz, Shaykh ‘Abd 
    al-Razzaaq ‘Afeefi, Shaykh ‘Abd-Allah ibn Ghadyaan 

    Fataawa al-Lajnah al-Daa’imah

    See also the answer to question no.
    112902 

    And Allah knows best.