What happens if you die without a will
Without a will, the Civil Code decides (legal devolution), in fixed shares. With a married or civil-union spouse and children: one third to the spouse, two thirds to the children. Without children but with your parents: two thirds to the spouse, one third to the parents. Without children or parents but with brothers and sisters: two thirds to the spouse, one third to them. Without a spouse, everything goes to the children.
None of it can be negotiated: a relative or an organisation you wanted to help does not exist in the eyes of the law.

