An important role in matters of succession occupies legal succession , because its principles operate whenever the cujus not appoint acts of the last expression of the will or inheritance impartial when he did it against the law. When the leaves lacked testamentary inheritance of property belonging to legal inheritance is the problem of inheritance. Although the deceased disposed of his property by will, these provisions no longer valid last will, inheritance is by the law itself refers. It should be noted that there are situations that heritage is itself refers both by law and by testament: it is a situation where , with heirs, the deceased can dispose acts of last will only a certain part of the inheritance ( crank available ), rest ( book ) returning certain legal heirs under the law.