Purify this money by donating them to charity.
In Islam bank interests are profited because they are considered to be usury (Riba) as the money increasing without real reason. Any way the interest money couldnot be prohibited in other cultures. But here we considered our audience to be a practising muslim and they don’t accept not HALAL money to be added to their account and at the same time they may get some interest from banks, insurance accident or other way. In this case NASF would help in receiving their money to be purified by using them in a suitable way according to the sharia’h compliance.