CHIS Directive No. 2 entitled “Recovery of Undue Payments”, approved by the Director-General after discussion at the Standing Concertation Committee on 27 June 2018, lays down the provisions governing the application of the CHIS Rules in respect of the recovery of undue payments (sums unduly received by a Member, see Article V 4.01).
This Directive is available via the following link: https://cds.cern.ch/record/2654418?ln=en
It enters into force on 1 February 2019.