Kernrechtsfrage
Whether B.X. had her support domicile in Aargau or Zurich during the placement period.
Extrahierter Entscheid
B.X. was deemed to have had support domicile in Aargau during the relevant period, so Zurich had no right to reimbursement from Aargau.
Extrahierte Begründung
For an unmarried minor, support domicile follows the parents or, if living apart, the parent with whom the child resides; if the child permanently does not live with either parent, the last support domicile of the relevant parent applies. A.X. lost her support domicile in Bremgarten upon leaving and filing a retroactive deregistration, but the court held that this did not help Zurich because the decisive finding was that the contested reimbursement claim failed on the cantonal allocation under the ZUG.