Apartment Append

Improve the deliverability of your mailing list by adding missing apartment numbers.

Using our CASS process with DPV, which validates mailing addresses and USPS delivery points, we can identify addresses that are missing, or contain invalid, secondary address information, such as apartment numbers.

Using our Apartment Append service we can process these records in an effort to fill in this missing information, thus improving your address and the deliverability of your mailing list.

This process involves comparing your name and address information to a national consumer database. When we are able to find a match based on your name and address we can update the missing apartment number information.

After the missing or invalid apartment number information is filled in, your address is now complete, deliverable and will be DPV validated. This also allows other services such as NCOALink to identify change-of-address matches that otherwise would not have been possible without the correct apartment number.

Apartment Append Output

  • CASS™ standardization of your input address
    • ZIP + 4® Coding
    • Carrier Route
    • DPV® return code and DPV footnotes
    • LACSLink®
    • SuiteLink™
  • Apartment Append indicator