Question juridique clé
Whether the extraordinary termination under Art. 257f CO was valid despite the tenant's objections to the evidence.
Solution extraite
The landlords validly terminated the lease because the tenant persisted in behavior breaching diligence and neighborly duties after a written warning, and the continuation of the lease had become unbearable.
Motifs extraits
Convergent witness evidence supported continued noise and clutter in the common areas. The warning of 11 December 2008 was explicit, the conduct continued, and the notice of 17 March 2009 complied with the statutory notice period and end-of-month requirement.