Legal system in the Ducatus: early customs (IX-XII century). Personal status. Slaves, coloni, livellarii, excusati Palatii. Family: engagement, repromissa, arcella, wedding, marriage, divortium. Sons and daughters: filii divisi and indivisi. Successions: last wills per breviarium and by deed of notary. Lack of heredis institutio. Commissarìa. The widow domna et domina. Pelicia vel grosina. How to demand restitution of the repromissa after one year and one day from the death of the husband. Written proof of relevant elements through inventory and quittance for the repromissa; cartula testamenti; inventory of the inheritance; breviarium of sacramentum de repromissa; breviarium of investicio; cartula securitatis.