DPV, or Delivery Point Validation, is a USPS licensed address verification process that confirms whether a specific address can actually receive mail.

While CASS Certification standardizes and corrects address formatting, DPV takes address validation one step further by determining whether the address exists as an active USPS delivery point.

DPV processing verifies:

• Valid delivery addresses
• Commercial mail receiving agencies (CMRAs)
• Residential and business delivery points
• Invalid or nonexistent addresses
• Missing apartment or suite numbers
• Deliverable versus non deliverable locations

This additional level of verification helps ensure your mail reaches real addresses capable of receiving mail delivery.

Many mailing lists contain records that appear correct but cannot actually receive mail. These records can increase printing costs, waste postage, and negatively impact campaign performance.

Examples include:

• Missing apartment or unit numbers
• Improperly formatted secondary addresses
• Nonexistent street addresses
• Addresses that are not recognized by USPS as deliverable
• Invalid building numbers

Without DPV processing, these records may remain hidden in your database until mail is returned as undeliverable.

• Verify Address Deliverability DPV confirms whether an address exists as an active USPS recognized delivery point. This helps eliminate uncertainty and improves confidence in your mailing data.
• Reduce Undeliverable Mail Mail returned due to invalid addresses represents wasted printing, production, and postage costs. DPV processing helps identify problematic records before mail enters production.
• Improve Mailing List Accuracy Accurate data is the foundation of every successful marketing campaign. DPV helps validate addresses at the delivery point level, improving the overall quality of your database.
• Identify Missing Apartment and Suite Numbers One of the most common causes of undeliverable mail is incomplete secondary address information. DPV can identify addresses where apartment, suite, or unit numbers are required but missing.
• Increase Campaign ROI By removing invalid and undeliverable records from your mailing list, DPV helps improve response rates and allows more of your marketing budget to reach real prospects and customers.

AmeriList’s DPV Processing services can help identify:

• Deliverable addresses
• Invalid street addresses
• Non deliverable addresses
• Commercial Mail Receiving Agencies (CMRAs)
• Missing secondary numbers
• Vacant delivery points when combined with other USPS services
• Apartment and suite validation issues
• Residential and business delivery locations

The result is a cleaner, more reliable mailing database that supports stronger marketing performance.

Many organizations confuse DPV and CASS processing, but each serves a different purpose.

• CASS Certification CASS standardizes and corrects address formatting according to USPS standards. It verifies that address components such as street names, cities, states, and ZIP Codes are properly formatted.
• DPV Processing DPV confirms whether the address actually exists as a valid USPS delivery point capable of receiving mail.

In simple terms:

CASS asks: “Is the address formatted correctly?”

DPV asks: “Can mail actually be delivered there?”

For maximum address accuracy, both services should be used together.

DPV processing is one component of AmeriList’s comprehensive data hygiene and mailing list optimization services.

For the highest level of address accuracy, we often combine DPV with:

• CASS Certification
• Merge/Purge Services
• NCOA Processing
• Address Standardization
• LACSLik Processing
• Deceased Suppression
• DSF² Processing
• Data Enhancement Services
• SuiteLink Processing

Together, these services help create cleaner databases, improve deliverability, and reduce marketing waste.

Organizations that rely on direct mail and customer communications can benefit significantly from DPV verification.

Common users include:

• Direct Mail Marketers
• Educational Institutions
• Nonprofit Organizations
• Government Agencies
• Financial Institutions
• Publishers
• Healthcare Providers
• Retailers
• Insurance Companies
• Printers and Mail Houses

Any organization that depends on accurate postal delivery can improve results through DPV processing.