He has a shop in the market and people ask him where riba-based banks are; should he tell them?
Question

                I own a shop in the market and some people come to me and ask me where the riba-based banks are, and I tell them that I don’t know, even though I do know where they are. Is this regarded as lying, and cooperating in sin and transgression?.
Praise be to Allah.
      It is haraam to deal with riba-based banks in order to get 
      a loan or to put money in savings accounts, because that is riba and is 
      haraam. It is also haraam to put money in current accounts except when 
      that is necessary in order to protect the money when there is no Islamic 
      bank. 

    There are other haraam transactions that are done by 
    riba-based banks, having to do with letters of credit, credit cards, and so 
    on. 

    It is permissible to deal with these banks with regard to 
    permissible matters such as transferring money, exchanging currency, cashing 
    cheques and so on. 

    Based on that, the person who asks you where the bank is may 
    want to go there for a permissible purpose, in which case your telling him 
    would not come under the heading of cooperating in sin and transgression. 

    If you want to be on the safe side and not tell anyone where 
    the bank is under any circumstances, they you should use a double-entendre 
    when replying, such as saying, It is close to here, or not far away, but ask 
    someone who can describe it properly, and so on. You do not have to tell a 
    blatant lie. 

    See also the answer to questions no.
    27261 and
    101747. 

    And Allah knows best.