Whether the landlord could recover unpaid rent arrears of CHF 6,510 plus interest.
Yes. The tenant defaulted and the landlord's allegations were treated as true under the procedural presumption; the arrears were proven by the record.
Under Art. 308 al. 2 CPC, facts alleged by the present party are presumed true unless contradicted by the file. The rent arrears were supported by the dossier and were not rebutted.