Key legal question
Whether the appeal against the interlocutory return order was admissible under Art. 93 BGG.
Extracted holding
The appeal was inadmissible because the appellant showed neither irreparable harm nor that an immediate decision would avoid extensive evidence-taking.
Extracted reasoning
A return order is a separately appealable interim decision, including its costs ruling. The exception under Art. 93 BGG is interpreted restrictively, and the appellant failed to substantiate any admissibility ground under Art. 42 BGG.