Questione giuridica chiave
Admissibility of the appeal against the interim order
Decisione estratta
The appeal is inadmissible because the appellant did not sufficiently show a non-reparable disadvantage or that immediate acceptance would avoid extensive evidence proceedings.
Motivazione estratta
The challenged decision was an independently appealable interim order under Art. 93 BGG. The appellant only argued that the CHF 400 advance payment was disproportionate to the CHF 250 dispute value and thus did not demonstrate a federal-law violation.