Question juridique clé
Whether the appeal against the intermediate order was admissible under Art. 93 BGG.
Solution extraite
The appeal was inadmissible because no irreparable legal disadvantage was shown and no immediate final decision in the main matter could be obtained.
Motifs extraits
The contested order was an interim decision. A possible future advance payment order was not yet issued, and any advance-payment issue could be reviewed together with the final judgment. The conditions of Art. 93(1)(a) or (b) BGG were not met.