How should a woman act who inherited usurious money from her father in 1997 and invested it based on a previous fatwa, then found fatwas obliging her to dispose of the usurious money, and she is now divorced and in need of money? And do the losses incurred by her money in trade count as purification for part of it?

If a father deposits money in a usurious bank, the sin is solely upon him. If he dies and the money remains, the sin falls upon the heirs who are able to withdraw it. Usurious gains (riba) do not enter into the inheritance and must be disposed of by spending them on public welfare for Muslims, or for the poor and needy. The heir must strive to distinguish unlawful money in his share to dispose of it, and one's conscience is not cleared except with certainty. Usurious gains are not inherited and should be spent on charitable causes. Zakat is due on the remaining money if it reaches the nisab (threshold). If the woman is poor, it is permissible for her to benefit from these funds. Loss in a new company's trade might be considered a purification of the money from usury, provided that the money was not already received and then returned. As for usury in the father's estate, an incidental loss is not considered a purification for it.