Address Validation

Postal Address Verification (PAV)

What is Address Verification?

Address verification is a process that compares an address against the official USPS database and tries to find a match. If a match is found, it means that the address is deliverable. If an address is not found, address verification software will correct the address, if applicable, and then compare it again against the database. This is part of a process called the Data Hygiene process, which keeps addresses and contact data listed in the USPS and other databases accurate.

How Does the API Verify Addresses?

It takes three steps for CDYNE’s Postal Address Verification (PAV) API to verify your postal addresses. Why three steps? Because verification alone doesn’t guarantee deliverability.

Envelope inside location pinpoint

1. Standardize

Standardization formats your addresses to meet USPS standards.

Location pinpoint a magnifying glass

2. Correct

Correction identifies and corrects wrong address information.

Check inside cog wheel atop map

3. Validate

Validation uses the USPS database to ensure address deliverability.

What Does CDYNE’s PAV API Do?

Postal address verification saves time, money, and resources by verifying addresses for deliverability before mail and packages are sent out. We help businesses ensure they have accurate data and successful mailing campaigns. To achieve this, our PAV does all of the following.

  • Corrects spelling errors
  • Formats with USPS capitalization
  • Fixes incorrect abbreviations
  • Formats ZIP Codes to ZIP+4
  • Identifies missing information

Examples of Address Verification with PAV API

Our PAV API is CASS certified and can validate bulk address in a fraction of a second. Ready to see how easy it is? Start using PAV today with a limited-time free trial.

Free Trial Time!

Inputs Alternative Addresses

Before Validation

2204 Fernhill Ct.
Chesapeake, VA 23323-1194

After Validation

2204 Fernhill Dr.
Chesapeake, VA 23323-1194

Formats to ZIP+4

Before Standardization

31 Acorn Ridge Drive
Elizabeth City, NC 55423

After Standardization

31 Acorn Ridge Drive
Elizabeth City, NC 55423-6231

Benefits of Address Verification

Businesses can verify addresses quickly and easily by using (you guessed it) an address validation service. PAV API keeps your databases accurate and ensures you have access to quality data. But those aren’t the only benefits.


Increased ROI

Reach customers the first time and improve the results of your mail campaigns.


Reduced Cost

Stop wasting money on undeliverable mail and postal returns, and qualify for bulk discounts.


Fast Results

Get bulk USPS address standardization results in just a fraction of a second with PAV API.


Data Management

Standardize address data and ensure customer information is up-to-date and accurate.


Fraud Protection

Reduce fraud by identifying invalid or fake addresses before sending mail and packages.



PAV will standardize, correct, and validate addresses in the U.S. and Canada.

When To Use Address Verification

If you send out mail or packages, then you’ve got a use for an address verification system. Address verification services keep your campaign and contact data up to date, thereby increasing your ROI and driving sales. Simply run your data through our PAV API before sending out mail to ensure all addresses are correct — and that’s it! Our three-step process completes bulk address verification in a fraction of a second.

Address Validation Is Perfect For Your Industry

Address validators are useful for every industry, from international restaurant chains to locally-owned car dealerships. Scroll over each industry below to see an example of how you can use our PAV API.

  • Automotive
  • Banks & Financial Institutions
  • Churches & Ministries
  • Debt Collection Agencies
  • Gyms & Fitness Centers
  • Healthcare
  • Hospitality
  • Nonprofits & Charities
  • Political Campaigns
  • Radio Stations
  • Real Estate
  • Retail Stores
  • Salons & Spas
  • School & Universities

Don’t see your industry here? Contact us today to learn how PAV can help you.

Address Verification Features

CDYNE’s address verification includes features for every business need.

Included Features

DPV Return Code System

Confirm the existence of a specific address.

LACSLink Processing

Update old rural route addresses.

POSTNET Delivery Point Barcodes

Qualify for additional USPS discounts.


Correct and update business records.

Intelligent Mail Barcodes

Qualify for additional USPS discounts.

More Features

For your convenience, we also offer these optional features.

  • Residential Delivery Indicator (RDI)
  • Proper Case Formatting
  • Census Data
  • Geolocation Data
  • Legislative Data
  • Carrier Route (CR)
  • eLOT®

How To Get Address Verification For Your Business

It’s never been easier to maximize your address and data quality. By signing up with CDNE’s PAV API, you can standardize, correct, and verify mailing addresses in bulk — all with the push of a button. Send your mail to the right address the first time, every time.


We know that data drives your business, which is why we’re committed to providing the best quality data in the industry.

Our Data is Accurate

PAV is USPS CASS Certified, which means that we return accurate, quality data in all of these areas and more.

  • ZIP+4 Correction
  • 5-Digit Coding
  • Carrier Route Cording
  • SuiteLink®
  • Delivery Point Validation®
  • Residential Delivery Indicator
  • LACSLink®
  • eLOT®


CDYNE takes every precaution to make sure your data is kept safe and secure by using these precautions and more.

  • Fully Redundant Systems
  • Location Fail-Over
  • HTTPS Protocol
  • 24/7 Data Center Monitoring
  • Fire Suppression
  • Uninterruptible Power Supplies


We return an extensive set of return values. Our appended information includes all the values below and more.

  • DPV Confirmation
  • Intelligent Mail Bar Code
  • Congress District Number
  • State Legislative Upper
  • Longitude
  • Time Zone
  • Area Code
  • County

Sign up and start your free trial today to see how easy it can be to get better data quality.

I’m Ready!

Address Verification Pricing

Great Service. Competitive Pricing.

Pick the plan that works best for you and never pay for more than you need with volume-based pricing. There are no hidden fees and no long-term commitment required to get started.

  • Volume-based pricing
  • $0.03/transaction standard
  • $9.99/month API fee

Custom plan packages are also available featuring volume-based discounts, varying levels of technical support, and more.

Sign Up Now

All plans include:

  • Residential Delivery Indicator
  • Code Documentation
  • HTTPS Protocol
  • Geolocation
  • Instant Address Verification
  • CASS Certification

Inquire about volume-based discounts.

Contact Us

Address Verification FAQs

Postal Address Verification (PAV) is an API (Application Programming Interface). It allows a business’s IT department to configure the Web Service on a web page, application or database with a few lines of code. There is no software to buy or install.

Our API delivers address results in a fraction of a second.

We receive updates from USPS once per month.

The API can be consumed with any programming language that supports REST or SOAP. See our Quick Start to see examples and a how-to guide on implementation.

Not at this time. CDYNE offers this API as a web service call requiring some coding to consume the API. However, you can save returned results to a database for your records.

Emergency support is available 24/7. Please see our Contact page for more information.

Read our full list of general and technical FAQs.

Why Businesses Choose CDYNE’s Address Verification API

Take the uncertainty out of mailing campaigns with CDYNE’s PAV API. We’ve been providing businesses with top-rated software solutions since 1999.

Address Verification Your Way

Volume-Based Pricing

With per-transaction pricing and customized plans, our PAV API fits every budget.

Customer Satisfaction

We strive to provide the best customer service, which is why we offer a SLA.

Great Coverage

Our PAV API standardizes address all across the U.S., U.S. territories, and even Canada.

Emergency Support

After-hours emergency? No problem with our emergency support.