If a beneficiary asks that we not change his/her address, reinput the old address
            exactly as shown on the old MBR. The address will be updated to the MBR and the system
            will then post an “X” in the ZIP flag field to prevent the case from being reselected
            in the next NCOA matching operation. (For more information on updating the ZIP flag
            field see MSOM T2PE 007.024).
         
         For “call-in” letters, input a COA through normal COA procedures. If we do not hear
            from the beneficiary, the ZIP flag of “L” will remain on the MBR, and the record will
            be reselected for NCOA processing again at some future date. For automatic address
            updates, the ZIP flag of “L” will change to “P” when the transaction processes the
            update.