Is it lawful/permissible to use the money given to me by the banks in non-Mulim (i.e. in the West) countries as a result of interest from a CD account, savings account with interest, or a promotional account in which you are rewarded (one time only) for opening a specific type of account and performing some banking activities?
It is permissible to receive and use the interest earned from non-Muslim banks as long as you do not stipulate the conditions of interest.