Address Standardization

Postal Address Verification (PAV)

What is Address Standardization?

Address standardization is the process of changing an address to adhere to United States Postal Service (USPS) standards. The USPS defines a standardized address as one that is “fully spelled out, abbreviated using the Postal Service standard abbreviations … or as shown in the current Postal Service ZIP+4.”

What is ZIP+4?

ZIP+4 is an extension of regular ZIP Codes. A basic ZIP Code includes five digits, whereas a ZIP+4 code includes those same five digits plus four extra digits that designate a more specific location.

How Does Address Verification Work?

CDYNE’s Postal Address Verification (PAV) API uses a simple three-step process to correct your postal addresses in bulk.

Envelope inside location pinpoint

1. Standardize

Location pinpoint a magnifying glass

2. Correct

Check inside cog wheel atop map

3. Validate

The Data Hygiene Process

Address standardization is the first step in what is called the address data hygiene process.

  • 1. Standardization formats addresses to meet USPS standards.
  • 2. Correction identifies and corrects wrong address information.
  • 3. Validation uses the USPS databases to ensure address deliverability.

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

Keep in Mind…

Address standardization greatly increases delivery time and the likelihood of a successful delivery. However, standardization alone does not guarantee deliverability or validity, which is why our PAV API also includes address correction and validation.

Examples of Address Standardization

Fixes Incorrect Abbreviations

Before Standardization

092 Applebound Av.
Suite 300
Chesapeake, VA 23323-1194

After Standardization

092 Applebound Ave.
Ste. 300
Chesapeake, VA 23323-1194

Formats to ZIP+4

Before Standardization

3310 Hickory Court NE
Elizabeth City, NC 55423

After Standardization

3310 Hickory Court NE
Elizabeth City, NC 55423-6231

Benefits of Address Standardization

Besides making sure your mail gets where it’s supposed to go, there are a whole host of benefits to using an address standardization tool like our PAV API.



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.

Even More Benefits

  • Increased connection with your target audiences.
  • Increased accuracy for your campaigns and contacts
  • Increased coverage across all U.S. territories and Canada

When To Use Address Standardization

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.

Accurate Addresses For

  • Mailing Campaigns
  • License Renewals
  • Customer Rewards
  • Donation Drives
  • Exclusive Discounts
  • Loyalty Programs
  • Rebate Offers
  • Financial Information
  • Legal Documents
  • Membership Renewals
  • Paper Billing
  • Company Newsletters
  • Political Messages

Address Standardization Features

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

Included Features

DPV Return Code System

A comprehensive return code system that confirms the existence of a specific address.

LACSLink Processing

Update old rural route addresses with LACSLink Processing from USPS.


Correct business records with accurate suite information.

Features with Discounts

Qualify for additional USPS discounts with barcoding.

Intelligent Mail Barcodes

POSTNET Delivery Point Barcodes

Even More Features

PAV API offers these optional features for your mailing convenience.

  • Residential Delivery Indicator (RDI)
  • Census Data
  • Geolocation Data
  • Legislative Data
  • Carrier Route Codes
  • eLOT®
  • P.O. Box Validation
  • Batch Processing

How To Get Address Standardization For Your Business

To start increasing your efficiency and accuracy in bulk mailings, sign up for an address standardization software. Our Postal Address Verification (PAV) is easy to use and returns standardization information in minutes.

PAV is also a USPS CASS Certified address verification API solution. What does that mean? Simply put, it means our API scored top marks in accuracy for all of the areas below.

  • ZIP+4 Correction
  • Carrier Routes
  • Delivery Coding
  • Delivery Point Validation®
  • Residential Delivery Indicator
  • LACSLink®

Your business benefits from having a verified and standardized contact database. You’ll also receive discounts in shipping, bulk mailing, and more.

Address Standardization Pricing

Pick the plan that works best for you.

No hidden fees and no long-term commitment. That’s the CDYNE difference.

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

Your Plan, Your Way

We offer a variety of plans to meet your address standardization needs.

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 Standardization 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.

Names are included with the other verification information for high volume businesses or buildings only. Individual names are not included.

Yes, depending on the volume and your business needs. Please contact us to speak with a sales representative for more details.

We obtain our address data from the USPS (United States Postal Service) and our Census information from the US Census Bureau. We are in constant communication to ensure our information is accurate and up to date.

Read our full list of general and technical FAQs.

Why Businesses Choose CDYNE’s Address Standardization API

CDYNE has been a trusted software solutions provider since 1999. Send your mail out quickly and reliably. We’re a premiere postal address verification provider that has serviced hundreds of companies across multiple industries. Still not convinced? That’s okay. Keep reading to find out why so many customers prefer our PAV API.

Mailing Made Easy

Competitive Pricing

With volume-based pricing and customized plans, our PAV API fits every budget.

Customer Satisfaction

We strive to provide the best customer service— no exceptions. Read our full SLA.

Great Coverage

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

Emergency Support

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