Article 85

F1Any sum overpaid shall be recovered if the recipient was aware that there was no due reason for the payment or if the fact of the overpayment was patently such that he could not have been unaware of it.

F2The request for recovery must be made no later than five years from the date on which the sum was paid. Where the Appointing Authority is able to establish that the recipient deliberately misled the administration with a view to obtaining the sum concerned, the request for recovery shall not be invalidated even if this period has elapsed.