Ärvdabalk (1958:637 - Inheritance Code)

If a married person dies, the surviving spouse inherits the estate of the deceased. The spouses’ common children inherit from both spouses when the surviving spouse dies. If the spouse who dies had children with another person at the time of their passing, the non-common children may receive their inheritance immediately. It is possible to write a will on who is to inherit, however, a direct heir (e.g. the deceased’s non-common child) always has the right to its share of that spouse’s inheritance. Cohabitees do not inherit from one another and will have to write a will that regulates the inheritance in case one of them dies.