Question juridique clé
Whether the termination for arrears under Art. 257d CO was valid despite partial payment during the cure period.
Solution extraite
The termination was valid because an unpaid balance still remained at the expiry of the 30-day period, and the outstanding amount was not insignificant.
Motifs extraits
The tenant was in arrears when the notice to pay was sent; her judicial admission established the debt. Partial payment of CHF 6,400 did not extinguish the full arrears, so the statutory conditions for termination were met.