The USPS uses Customer IDs to audit your mailing process. As a result, a customer can be deleted only if a job has not yet been run for that customer. To delete a customer.
- Select Tools > Options > NCOA/Link. Click the Customers tab.
- Select the customer to delete.
- Click Delete. A message appears to confirm that this customer should be deleted.
- Click Yes if you want to delete the customer.
- Click OK.