What is the ruling on money a woman took from social welfare in her mother's name and with her consent thirty years ago, while she was in severe need? Does she have to return it, or is it lawful for her?

If the mother is eligible for the money and meets the conditions, and the daughter takes it as an agent on her behalf with her consent, then there is no harm in that. However, if the mother is not eligible, the granting authority must be consulted to verify. If the daughter is entitled to what she took according to their conditions, then it is permissible for her. If she is not entitled and they do not forgive her, she must return what she took if she is able. Otherwise, it is a debt upon her until its owners discharge it, and she must repent and seek forgiveness. It is not permissible for her to give the money to the needy as long as it is possible to return it to its rightful owners.