What is the ruling on working in a usurious bank as a marketer for it in exchange for a commission? Is the money earned from this work permissible (halal)? If it is forbidden (haram), what should be done with it?

The ruling on working in banks depends on the type of bank. If the bank is usurious, it is not permissible to work in it, especially if the work involves attracting customers for usurious loans. The salary earned from this work is considered unlawful (haram), and one must dispose of it by spending it on the public welfare of Muslims or giving it to the poor and needy, with the intention of disposal, not charity. However, if the bank is Islamic and its transactions are Sharia-compliant, and the woman's work in it is free from Sharia prohibitions like unlawful mixing, then there is no objection to working in it, and the salary is lawful (halal). If unlawful money mixes with lawful money, it becomes mixed money, and one must remove the amount of unlawful money to dispose of it so that the remainder becomes pure, for the prohibition relates to the owner's liability, not to the specific currency itself.