Question juridique clé
Which cantonal court has territorial jurisdiction over EL appeals involving children with a parent's invalidity pension?
Solution extraite
Jurisdiction lies with the court at the residence of the insured person, i.e. the father in Zurich; the children's residence in Schwyz is irrelevant here.
Motifs extraits
In EL disputes, Art. 58 ATSG is applied with regard to the legally relevant status in the EL context. The children have no original EL claim and are neither insured persons nor 'third parties' for venue purposes because they stand inside the disputed legal relationship. A split venue would be impracticable and could lead to inconsistent decisions; a single forum at the insured person's residence is required.