The article deals with the controversial institution of the settlement of heirs' extraordinary activities under Section 1693 (3) of the Czech Civil Code, which was adopted from German law (§ 2057a BGB). Similarly to collation, it both connects the area of inheritance and donation (it is a natural complement to a collation with respect to an inheritance share, with that it is linked by a common purpose), and represents an important instrument of family solidarity (however, it should not be a normal part of the succession proceedings, but should be rather used in exceptional cases).