Key legal question
Whether the claim had to be dismissed or remanded because the state/canton was not joined despite public advance payment of child support.
Extracted holding
The omission did not require reversal at this stage; the state is not joined ex officio, and no later joinder is possible on appeal. The issue was harmless because the claim was dismissed anyway on the merits at first instance.
Extracted reasoning
Under the CPC, the parties define the proceedings and the court does not raise or add parties on its own motion. The transfer of the child-support claim to the canton through advance payments does not create an appellate power to add the canton later.