Questione giuridica chiave
Whether a landlord may request a rent increase for the extension period for the first time on appeal
Decisione estratta
No. The request is treated as a counterclaim-like claim that had to be raised with the first-instance answer; it cannot be introduced only in the appellate briefing.
Motivazione estratta
In ordinary written proceedings, a counterclaim must be filed with the answer under § 137(1)(d) ZPO. Appeal allows new allegations and evidence under § 296 ZPO, but not unrestricted new requests. The landlords were not formally aggrieved as to rent adjustment because they had not sought it below; therefore they lacked a basis to raise it on appeal.