18.3 Supplier will return to CloudPay as instructed any and all Client data and/or documents and an officer of Supplier shall certify in writing that it has complied with this clause 18.3 and has not retained any CloudPay or Client data and/or documents save to the minimum extent required by the operation of law provided always that Supplier shall notify CloudPay in writing of its obligations and, once the obligations are discharged, shall promptly provide the required certification. Notwithstanding the foregoing, if it is not reasonably practicable for Supplier to return or destroy Client data that is contained in Supplier’s backup tapes, then Supplier will notify CloudPay in writing thereof and Supplier shall keep the Client data secure and confidential and no longer process or otherwise use the Client data.