Questione giuridica chiave
Whether the subsidiary constitutional appeal was admissible despite the value in dispute being below CHF 30,000.
Decisione estratta
The appeal was admissible only as a subsidiary constitutional appeal; ordinary civil appeal was unavailable.
Motivazione estratta
The value in dispute did not reach the statutory threshold and no exception applied; the decision was final and last cantonal instance, filed in time and in proper form.