Key legal question
Whether a testamentary disposition in favor of an heir unworthy under Art. 540 Abs. 1 Ziff. 3 ZGB is valid or void.
Extracted holding
A testamentary appointment of an unworthy heir is void; the will does not survive as effective in favor of that person.
Extracted reasoning
Erbunwürdigkeit affects not only hereditary capacity but also the disposition itself where the testamentary gift contradicts the testator's will. For an appointed heir who is unworthy, the disposition is treated as if it had never existed, with the same practical effect as invalidity.