Question juridique clé
Whether the plaintiffs could seek invalidity of the 1973 will under Art. 519 ZGB
Solution extraite
They lacked standing to challenge the 1973 will as invalid; the dispute concerned revocation, not invalidity.
Motifs extraits
Invalidity under Art. 519 ZGB requires specific defects in execution or capacity. The alleged 1994 incapacity would only affect the later deletions, in respect of which the plaintiffs had no protected interest. As to the 1973 will, the relevant question was revocation under Art. 510 ZGB, which presupposes a validly made will.