Questione giuridica chiave
Whether the AI office's restitution claim for overpaid disability pensions was time-barred beyond the last twelve months before the restitution decision.
Decisione estratta
The restitution claim was time-barred for all payments older than twelve months, but not for the monthly payments made during the last twelve months before the decision.
Motivazione estratta
For periodic monthly pensions, the one-year limitation period under Art. 25 LPGA begins only when each monthly payment is actually made; therefore amounts paid within the year before the restitution decision remained recoverable.