Key legal question
Whether the lease termination for rent default under Art. 257d CO was valid.
Extracted holding
The termination was valid because the rent arrears were not duly cured within the formal deadline; the blocked-account payment did not count as proper consignation.
Extracted reasoning
Under Art. 257d CO, the tenant was in default and the landlords could terminate after the written warning period. The tenant could have avoided default by consigning rent with the cantonal office under Art. 259g CO, but he did not do so.