Some Finalist options require additional databases and are required for CASS certification and generating the USPS Form 3553 (CASS Summary Report).
| Option | Description | CASS Required? |
|---|---|---|
| DPV | The Delivery Point Validation (DPV) database contains data that enables you to determine if an address actually exists and whether the USPS actually delivers mail to an address. For information about DPV processing, refer to Using DPV Processing. | Y |
| EWS | The Early Warning System (EWS) database contains new address information that is in use but not yet available on the ZIP + 4 File. For information about EWS processing, refer toUsing EWS Processing. | N |
| LACSLink | The USPS LACSLink database contains data on address conversions resulting from a 911 emergency response implementation. For information about LACSLink processing, refer to "Using LACSLink Processing". | Y |
| PreciselyID | The PreciselyID provides a unique identifier for an addressable location. For information about PreciselyID processing, refer to Using PreciselyID Processing. | N |
| RDI | The Residential Delivery Indicator (RDI) database contains data that indicates whether the USPS identifies addresses as residential or business addresses. For more information about RDI processing, refer toUsing EWS Processing. | N |
| SuiteLink | The USPS SuiteLink database contains data on business addresses that were identified during CASS processing as high-rise default records with associated secondary information. For information about SuiteLink processing, refer to Using SuiteLink Processing. | Y |
| eLOT | The Enhanced Line of Travel (eLOT) database ensures that Enhanced Carrier Route mailings are closely sorted to the actual delivery sequence. For more information about eLOT processing, refer to Using Enhanced Line of Travel (eLOT) Processing. | N |