Questione giuridica chiave
Whether clause 6 of the 1999 agreement created an enforceable compensation claim against the heirs.
Decisione estratta
No enforceable claim arose from clause 6; the clause did not provide a valid basis for payment against the heirs.
Motivazione estratta
The alleged purchase right was void for lack of public notarization. The reference to 'economic ownership' had no legal effect in Swiss property law, and the wording did not clearly create a monetary claim. If treated as an inter vivos arrangement, it would amount to an impermissible contract to the detriment of third parties.