Key legal question
Whether the municipality could rely on the contractual anti-assignment clause against the assignee despite its prior conduct.
Extracted holding
The municipality was barred from invoking the non-assignment clause because its own prior conduct had created protected reliance and made its later objection inconsistent.
Extracted reasoning
The municipality had attempted to induce an assignment in favor of the plaintiff shortly before the disputed assignment was concluded. The plaintiff could rely on this conduct and make further dispositions. Under Art. 2 ZGB, such contradictory behavior amounted to abuse of rights.