Kernrechtsfrage
Whether the heirs must reimburse supplementary pensions paid for a divorced spouse from September 2000 to March 2005.
Extrahierter Entscheid
Yes. The payments were unlawful from the divorce date, and the reimbursement duty remains despite the appellants' arguments.
Extrahierte Begründung
The case concerns an AHV-analogous benefit aspect, not an IV-specific change. Therefore the refund obligation follows from the unlawful receipt itself; a breach of notification duty is not required for reimbursement.