The information requested is not readily available and to provide it would incur disproportionate cost. When notified of a customer death within Child Maintenance, there is a process to be followed to take the appropriate action on the case. This includes verifying the death of the customer. Requesting a copy of the death certificate is one such way of verifying a customer’s death, but if the death has been reported and verified elsewhere then the cross-government computer system called Customer Information System (CIS) will be updated, meaning further evidence is not required for Child Maintenance purposes. We cannot readily identify from data sources whether a copy of a death certificate is held on a case so providing accurate data would involve manually reviewing every case where a customer has died.