If the cost center feature is enabled in the Enterprise Installation screen, when performing the Purge Payment History update Spectrum will remove the customer payment history only if the operator performing the update has permission to access the cost center assigned to the payment transaction. Spectrum compares the payment's cost center with cost centers in the operator's assigned scheme; if the payment cost center is not present, then that payment history is not removed. Spectrum also compares the customer's list of shared cost centers with cost centers in the operator's assigned scheme; if there are no common cost centers, then that customer history is not removed.