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CASS and DPV: A Higher Standard for Address Accuracy

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If you market to or serve people by mail, there are two acronyms you should get to know: CASS and DPV. Here is a quick summary of both of them:

  • CASS stands for the Coding Accuracy Support System™. As the name implies, its function is to support address verification software vendors with a measurable standard for accuracy. It also represents a very high bar set by the US Postal Service to ensure that address verification meets very strict quality standards.
  • DPV stands for Delivery Point Validation™. This is a further capability supported under CASS, making sure that an address is deliverable.

You may ask, “If an address is accurate, why do we have to check to make sure it is also deliverable?” The answer lies in the broader definition of what an address is – a placeholder for a residence or business that could receive mail. Not every address is, in fact, deliverable: for example, 45 Elm Street might be someone’s residence, while 47 Elm Street might currently be a vacant lot – or not exist at all. Another example is multi-unit dwellings that share an address: 100 State Street, Apartment 4 may be deliverable, while 100 State Street, Apartment 5 may not exist. So you want to ensure addressability AND deliverability for every address within your contact database.

Now, here is why you need to care about CASS and DPV in particular:

Rigorous. CASS certification is truly the data quality equivalent of Navy SEAL training. The first step is an optional (Stage I) test that lets developers run a sample address file for testing and debugging purposes. Next is Stage II, a blind 150,000-address test that only returns scores from USPS, not results. To obtain CASS certification, these scores must meet strict passing criteria ranging between 98.5% and 100% in specific categories.

Recurring. CASS certification is not a lifetime badge of honor. The USPS requires software providers to renew their certification every year, with a fresh round of testing required. Service Objects has not only been continuously CASS-certified for much of the past decade, but has also forged a unique partnership with USPS to update and refresh its CASS-certified address data every two weeks.

Reliable. DPV capabilities are based on the master list of delivery points registered with the USPS, which stores actual deliverable addresses in the form of an 11-digit code, incorporating data such as address, unit, and ZIP+4 codes. While the codes themselves can (and do) change frequently, the real key in address deliverability is having up-to-date access to current USPS data. Service Objects licenses DPV tools as an integral part of its address validation capabilities.

Our CASS-certified address engine and continuously updated USPS address data are two of the critical components behind our proprietary address database. Whether you run your addresses through our USPS address validation API in your application or use a convenient batch process, those addresses are instantly compared, validated, corrected, and/or appended to provide accurate results.

If you’ve read this far, it is probably clear that CASS certification and DPV capabilities are critically important for managing your contact data quality. So be sure to partner with a vendor that maintains continuous CASS certification with full support of DPV. Like Service Objects, of course. Contact us to learn what we can do for your contact addresses and marketing leads today!

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