Address Correction

Postal Address Verification (PAV)

What is Address Correction?

When the original ship-to address on mail or a package is incorrect, it must be corrected before delivery. This process is called address correction. To be considered correct, addresses must not only be exact, but also in the format required by the national postal authority, the United States Postal Service (USPS).

How Does the API Correct Postal Addresses?

The Postal Address Verification (PAV) API fixes postal addresses in three basic steps.

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.

Why the Three-Step Process?

Correction alone doesn't guarantee deliverability or validity, which is why CDYNE's PAV API uses (1) Standardization, (2) Correction, and (3) Validation.

What Does CDYNE's PAV API Do?

We help you save time, money, and resources by verifying addresses for deliverability before mail and packages are sent out. PAV helps businesses ensure data quality for all U.S. customers.

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

Examples of Address Correction

Fixes Incorrect Addresses

Before Correction

24 West Meatball Street
Salem, South Carolina 75311

After Correction

24 East Meatball Street
Salem, South Carolina 75311

Formats to ZIP+4

Before Correction

3310 Ice Cream Court NE
Elizabeth City, NC 55423

After Correction

3310 Ice Cream Court NE
Elizabeth City, NC 55423-6231

Benefits of Address Correction

Besides making sure mail carriers can actually deliver your packages, using an address correction API also offers other benefits.



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



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



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.



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



Get address correction coverage for addresses in all U.S. territories, the U.S., and Canada.

When To Use Address Correction

Address correction services are used in just about every industry. From global corporations to local nonprofits, almost every organization sends mail. To make sure your mail is delivered to the correct address in a timely manner, use an address standardization service.

Address Correction Is Perfect For Every Industry

Debt Collection

Send debt validation notices, DNC confirmations, and more.


Make sure medical bills and test results reach the correct patient.


Reward loyal customers with exclusive discounts and offers.


Mail timely reminders about license renewals and state inspections.

Accurate Addresses For Every Use

  • Mailing Campaigns
  • Subscription Renewals
  • Loyalty Program Sign-Ups
  • Donation Drives
  • Coupons & Sales
  • Absentee Ballots
  • Membership Programs
  • Mail-In Response Forms
  • Banking Information
  • Notices of Intent
  • Appointment Reminders
  • Paper Billing & Fees
  • Company Materials

Address Correction Features

CDYNE's address correction 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.

Optional Features

Residential Delivery Indicator (RDI)

Avoid residential delivery surcharges.

Proper Case Formatting

Return data in proper case format.

Census Data

Includes CMSA, FIPS, and more.

Geolocation Data

Includes area code, time zone, and more.

Legislative Data

Includes congressional district number and more.

Carrier Route (CR)

Take advantage of presort postage discounts.


Qualify for enhanced carrier route presort discounts.

How To Get Address Correction For Your Business

Send your mail to the correct address every time with an address correction software. CDYNE's CASS Certified PAV API maximizes address quality without sacrificing speed or accuracy.

To be USPS CASS Certified, an API must be evaluated on and a achieve a certain level of accuracy in the following areas:

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

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

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Address Correction Pricing

Pick the plan that works best for you.

No hidden fees and no long-term commitment.

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

Inquire about volume-based discounts.

Select your plan and start using PAV today!

Sign Up Now

All plans include:

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

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

Address Correction 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.

We provide geolocation for USPS mailbox locations. If not available, geolocation information defaults to the centralized point of the ZIP Code+4.

Yes. You can qualify for some postal discounts by using features such as the Intelligent Barcode to lower processing costs with the USPS. Please contact sales for more details.

Yes. Our data includes census block and tract numbers, CMSA (US Census Consolidated Metropolitan Statistical Area), FIPS (Federal Information Processing Standard Code), MA (Metropolitan Area), MSA (US Census Metropolitan Statistical Area), and PMSA (US Census Primary Metropolitan Statistical Area).

Read our full list of general and technical FAQs.

Why Businesses Choose CDYNE's Address Correction API

CDYNE's API ensures your mail is delivered to the correct address, saving you from worrying about poor campaign quality and incorrect data. We've corrected addresses for hundreds of companies, and have been providing trusted software solutions since 1999.

Address Correction for Every Customer

Per-Transaction Pricing

With volume-based 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.

Correction Coverage

Our PAV API corrects address for the U.S., U.S. territories, and even Canada.

Emergency Support

Emergencies can happen at any time, so we offer emergency support.