Civil Code (Cap. 16), article 858

858. (1) A person who has accepte d an inheritance cannot impeach the acceptance, unless such acceptance was the result o f violence, or of fraud practised upon him. (2) Nevertheless, if a will is discovered which, at the time of acceptance, was unknown to the person accepting, such person shall not be bound to discharge the legacies bequeathed in such will beyond the value of the inheritance, saving the reserved portio n to which such person may be entitled. Period of limitation as to right of accepting vacant inheritance.