Address Verification

Address verification helps you ensure that mail reaches its destination on time with complete accuracy. The service is available online and can be used to verify addresses for both business and residential. PostGrid offers bulk address validation services, and the services include, address standardization, parsing, address correction, bulk mailing services, delivery point validation, etc. We use official sources like USPS, Canada Post, Royal Mail, and Australia Post to verify and validate addresses.

Businesses need a reliable address verification service to overcome various challenges they encounter while managing address databases. It drastically reduces their return mail by verifying the addresses of the intended recipients, leading to significant savings.

Organizations also get clean and high-quality address data while processing their lists. Information-critical industries must verify the identity of their users. An address verification tool is the perfect solution to avoid fraud and unauthorized access. For example, many finance companies use our API to verify their clients’ addresses.

Poorly typed addresses also impact the delivery speed of mail and packages. We standardize and correct addresses according to local standards with our address verification tool. It helps mailing workers to clearly understand the postal address and ensure smoother deliveries.

According to PostGrid’s State of Address Verification 2025 Report, the average cost of every failed delivery in the US is as high as $23.80. Assuming you send 1000 items monthly, you incur at least $23,800 in losses. Also, 85% of businesses have reported higher operational costs due to incorrect customer data.

PostGrid Address verification API and dashboard can resolve these issues for your organization. Rated 5/5 on G2, this solution allows you to convert old, incomplete records into updated, deliverable mailing lists you can use for several purposes. You can leverage these validated records to send marketing, transactional, and compliance mailpieces without getting mail returns. Also, you can use it to conduct location-based promotional activities for new and existing customers. Here are more benefits to consider:

• Lower shipping times: You can complete deliveries faster using PostGrid Address Verification because the courier can route your items properly. Since you mention standardized and validated addresses that the post office equipment can read properly, prompt deliveries are possible.
• No reshipping hassles: Sending mailpieces correctly on your first attempt ensures you don't need to repack and reship the items. Hence, you can save your staff time and effort, helping them focus on other productive tasks.
• Higher customer satisfaction: Businesses can impress their buyers with quick and timely deliveries using PostGrid. They also need not call the costumes repeatedly to ask for their updated information.

Here are some of PostGrid's features to consider:

API Integration

PostGrid Address Verification offers easy API integration, allowing you to connect it directly to your website, app, or system. Once connected, it checks and fixes addresses automatically in real time as people type or submit forms. It helps avoid errors, saves time, and makes sure all addresses are correct before you use them. The API works with most platforms and is simple to set up, even if you're not a tech expert.

Compliance

The tool is fully compliant with HIPAA, PIPEDA, and GDPR. It follows strict privacy and security rules to protect personal information. Whether you’re handling health data, customer addresses, or other sensitive details, PostGrid keeps it safe. It stores data securely, uses encryption, and gives you control over how information is used. You can trust it for use in healthcare, finance, or any industry where privacy laws apply, helping you stay compliant while keeping your data accurate and up-to-date.

USPS CASS Certification

This certification means that our Address Verification solution meets the strict rules set by the USPS. It shows that addresses are cleaned, standardized, and formatted according to USPS standards. Also, it ensures your mail reaches its destination without errors or delays, reducing returned mail and saving money. With CASS Certification, you can trust that your mailing data is accurate and reliable, making your campaigns smoother and more efficient.

County and Census Data

PostGrid Address Verification can provide additional metadata for every verified address. Hence, you get extra details, such as the county name, FIPS code, census tract, and block number, along with the address. This data is helpful for businesses that need to group customers by location, study regional trends, or meet government reporting rules. It helps with better planning, targeting, and analysis. All of this is done automatically during the validation process, saving you time and improving your data quality.

Get a demo now to see how you can standardize, parse, and validate your mailing lists with PostGrid to save your time and resources!

Our Address Verification service involves an API or Application Programming Interface. You can integrate it with your current systems to use it. Additionally, the Web Service can be configured via a few lines of code on a web page, application, or database by a company's IT department. Software is not required. Our tool works in real time to verify and correct thousands of addresses within a few minutes.

Still, thinking about- How to use or integrate Address Verification API?  Sign up or Book a demo now.

Well, At PostGrid, our Address Verification API delivers the outcomes in just a few minutes and a few clicks! Somehow it is also dependent upon what you wish to verify- Does your address verification identify Residential or Commercial addresses?

Any business or individual could have a distinctive use case while using an address verification tool. However, these are some of the most prominent ones;

Marketing: Companies using a direct mail marketing campaign need an assurance of the deliverability of their marketing mailers. Our address verification API verifies addresses in real time to ensure their mailers reach the intended target audience.

Billing: Invoices and billing statements have confidential information. Companies want to deliver these documents to the right recipient with full security and accuracy. An address verification tool verifies their addresses for correct delivery.

E-commerce: An address verification API reduces the friction for customers to enter their addresses. Businesses can also ship products to verified, error-free, and deliverable-only addresses.

Insurance: Our address verification API helps in the quick onboarding of clients by verifying their addresses in real-time. Insurers need this service to avoid fraud and false claims. It also boosts the claim calculation process.

Healthcare: Medical institutions use our API for patient identity verification, improve the accuracy of medical billing, and send medical information to the correct postal address.

Financial Services: The address verification API works flawlessly by helping in processing loan applications and verifying users.

Real Estate: PostGrid’s API could be useful in verifying property listings to save time and resources. The geocoding feature provides relevant data from authentic and reliable sources.

Logistics and Transportation: The API is highly suitable for verifying addresses to optimize delivery or transportation routes with maximum efficiency.

Our standard address verification product covers US & Canada

Our International address verification product covers 245+ countries and territories. Click here to see the full country coverage and their verification level.

At PostGrid, our database updates from USPS at least once a month. Yes, we work in compliance with the USPS, so you can be assured of the quality of the database! For international verifications, our API updates according to a specific country’s update & authoritative schedule for the latest dataset.

A programming language supporting REST is required to use the API. The address verification and validation tools are instantly available through your software after integration. To learn how to implement it, see our API Docs to get answers to your questions.

Yes, we provide a self-hosted solution. Contact our sales. Using this API requires some coding on the part of the user. Returns can be saved to a database for future reference. If you need any help with the installation process, please feel free to connect with our team of professionals. We are always there to help you.

Coding Accuracy Support System (CASS) is an address verification standard governed by the USPS. It aims to ensure the maximum accuracy of address verification systems using USPS data. CASS helps USPS to optimize its operations with lower unsorted mail, undeliverable mail, and parcels.

Address verification software has to go through a stringent test to ensure the highest quality validation processes. Systems with certification must run their verification while considering the following areas;

• ZIP+4/ Delivery Point Coding
• 5-Digit Coding
• Carrier Route Coding
• DPV or DSF2
• eLOT
• RDI
• LACSLink
• SuiteLink

Yes, we do have emergency support available 24*7. You can contact us whenever you feel stuck or seek more information. Kindly mention the contact information!

Our client initially lost over $750,000 annually in losses to non-existent and inaccurate mailing addresses. They could not resolve this issue despite reminding their clients to update their information online multiple times. Hence, they had to take solid action at their level to prevent sending mail with confidential information to incorrect recipients, which could cause data leaks and other issues.

PostGrid Address Verification API allowed them to resolve this issue in two ways: The API blocked incorrect data from entering the client's system. Hence, all new records were updated, completed, and verified. Secondly, it allowed the company to run checks on all existing mailing lists occasionally. It filtered out outdated information, replacing it with fresh details or removing details the firm no longer needed.

If you want to send crucial documents via a direct mail campaign, it is best always to verify and standardize your customer addresses. Luckily, PostGrid offers more than Address Verification—it also helps you print and ship your mailers. Of course, you can calculate your expenses beforehand using our Direct Mail Cost Calculator! It shows how much your mailing campaigns will cost. Just enter details like size, quantity, and speed—it gives instant pricing.

One of our clients reported a 25% deduction in mail returns and a 72% increase in customer database accuracy. This company, in the financial services sector, first started using PostGrid Address Verification due to increasing volume. Initially, they had assigned the task of calling every client and confirming their mailing address to their staff. However, it is highly unproductive and time-consuming.

Despite calling customers, there were address errors because many clients mentioned incorrect spellings, or the employees could not interpret the correct location over the call. Also, it was impossible to call every client manually when the company had hundreds of thousands of clients. PostGrid allowed them to fight against these challenges in this step-by-step way:

• Input: A user submits an address through a form, including a consultation or signup form. The client integrated our API into their CRM, simplifying this process.
• Parsing: The system divides the address into parts, such as street, city, state, ZIP code, etc.
• Standardization: It then corrects formatting issues, adds missing info, and follows USPS-approved format.
• Validation: PostGrid Address Verification checks the address against USPS and other official databases to confirm it's real and deliverable.
• Geocoding: It assigns precise latitude and longitude to the address for location accuracy.
• Output: The system returns the verified, formatted address with delivery status and geocodes ready for use.

USPS, America’s largest postal service, uses a proprietary method for cross-referencing postal addresses to check their accuracy before you send mail. It qualifies businesses to claim USPS Marketing Mail and First-Class mail prices. However, this software has limited use cases.

PostGrid’s USPS address verification is a CASS-certified API that verifies addresses against the official USPS database for multiple use cases with maximum efficiency and integration features. You ensure a better ROI and reduced return mail when you verify your mailing lists with our API for your marketing campaigns.

Supported Character Sets and Scripts – PostGrid

At PostGrid, we understand the global nature of communication and the need to process addresses in various languages and scripts. Our platform is built to handle a wide range of character sets, enabling seamless international address verification and formatting.

Supported Writing Systems

PostGrid supports a comprehensive list of writing systems used across different regions of the world. These include:

• Latin (e.g., English, Spanish, French, German, Portuguese)

• Cyrillic (e.g., Russian, Bulgarian, Serbian)

• Greek

• Arabic

• Hebrew

• Hangul (Korean)

• Han Characters (Simplified and Traditional Chinese)

• Katakana & Hiragana (Japanese)

• Devanagari (e.g., Hindi, Marathi, Nepali)

• Thai

• Tamil

• Georgian

• Bengali

• Armenian

Our system is optimized to accurately handle international characters, preserving the integrity and structure of local addresses regardless of script.

Multilingual Input and Output

PostGrid’s API accepts and returns address data in the native language of the country, where applicable. For instance:

• Japanese addresses can be input and returned in both Kanji and Romaji.

• Cyrillic scripts are preserved in output for countries like Russia or Ukraine.

• Addresses in the Middle East are properly rendered in Arabic script, maintaining right-to-left text orientation.

Transliteration and Formatting

For clients who prefer address output in Latin characters, PostGrid provides transliteration options where applicable. This helps ensure compatibility with systems that may not support non-Latin characters, especially in logistics or shipping operations.

Universal Support for Global Expansion

Whether you’re verifying customer addresses in Berlin, shipping to Tokyo, or mailing to São Paulo, PostGrid’s character support ensures your data remains accurate and complete—no matter the language or script.

Address verification is a service offered to a business that verifies whether the address provided by the customer is accurate. An address may be verified using an API or by comparing it with a database of public addresses. Businesses must verify their addresses to protect themselves from fraudulent orders and minimize chargeback risks. Also, it helps businesses avoid problems such as undelivered packages by verifying addresses.

You can contact a PostGrid sales representative and sign up for our services. Also, you can get a USPS address verification API for your business. The process is straightforward. Get started today!

Based on years of experience in matching and resolving addresses, PostGrid's address verification API and software leverages advanced match logic. The street-level validation of US and world addresses is done by matching the address to millions of records based on the country, state, and zip code information. We have implemented our expertise throughout the entire process to identify, detect, and fix issues we've encountered and fixed over time.

You must confirm the mailing address with the recipient twice before mailing anything. Integrating PostGrid's autocomplete API into your website could be one solution to getting accurate addresses without typing everything.

Using fuzzy matching, you can add the missing details, rectify spacing errors, capitalize your addresses properly, and insert valid ZIP+4 codes. It gives you delivery-ready delivery addresses and avoids the incomplete USPS address problem. We use more data sources for the verification than the USPS address checker.

No, PostGrid's Address Verification API does not provide information on residents. Additionally, we do not unveil any identifiable information that is behind the address or even address metadata. Our Restful API provides data in the return if a customer inputs an address.

Most countries across the world maintain a respective address database. Individuals, businesses, and postal companies use this database to verify their addresses. This database can give you assurance about the existence of an address.

Each country uses a standard format for postal addresses. However, people may use different methods to write addresses. A reliable address standardization tool is necessary to convert your address according to local postal standards.

USPS provides an official API to verify and standardize addresses to match the USPS address format. They maintain a vast database of 1 million addresses in the United States with residential, business, and post office box delivery points. However, there are strict terms of use to implement the USPS API.

The address data completeness doesn’t consider private delivery companies like FedEx, DHL, UPS, and Amazon. In contrast, our API relies on USPS as well as other genuine sources of address information. It vastly improves the accuracy of the verification process.

You can also sign up for an account or contact our sales team to integrate our API right away!

Proof of address or residency is necessary to verify where an individual lives. It is different from other ID verification documents. Not every government-issued document has your current address.

Individuals with no proof of address document may prefer to buy a post office box in the U.S. to receive mail. However, it doesn't work as a residential address. The proof of address verification document allows individuals to access multiple services and allows banks to keep track of customers. Examples of acceptable proof:

• Utility Bills
• Bank or Credit Card Statements
• Insurance Policies
• Lease Agreements
• Rent Agreements
• Residence Permits
• Letters of Employment
• Vehicle Registrations
• Driver’s Licenses
• Company Payslips

Digital address verification refers to the address verification process with automation that provides real-time verification. It also relies on various databases, algorithms, and mapping software to cross-verify and ensure the highest accuracy of address data.

This approach provides numerous advantages over manual verification. Some notable benefits of digital address verification are improved efficiency and reduced errors.

Many individuals use these terms interchangeably. However, there are major differences between the two terms. Address validation ensures that your addresses are correct and deliverable. In contrast, address verification helps update and enhance your address data.

Professionals use address validation to resolve the problem of poor data collection at the entry point. An address verification tool compares addresses against an official directory, such as USPS or Canada Post, to ensure deliverability.

A reliable address verification tool like PostGrid may rely on multiple official and other databases to verify global addresses. For example, we have CASS (USPS), SERP (Canada), AMAS (Australia), and PAF (Royal Mail) certifications to provide accurate results for address verification queries.

There are the features that you can avail of while using PostGrid:

• Verify addresses instantly
• CSS Certification
• Restful API that allows you easy, flexible, and accurate integrations to your CRMs or your system solutions
• Scalable Solutions
• Premise Level Data

Sign up with us today, and let us help answer questions like “Does your address verification offer Geocoding (Lat & Long)?” and a lot more.

Yes, PostGrid's address verification solution gives you geocoding data like latitude and longitude coordinates. This information is often necessary to improve your address details and ship mail to the right destination without confusion.

Yes! PostGrid's API can validate, verify, autocomplete, standardize, and parse addresses in bulk and batches worldwide. You can run bulk verification requests by uploading a CSV file or simply from the API.

The API is capable of verifying 200K addresses at a time. It gives you a global reach covering 245+ countries and regions. Professionals can expect real-time results to ensure every address in their database is accurate.

PostGrid keeps up with the National Change of Address (NCOA) database to update address details accordingly. It helps you automatically replace obsolete addresses with new records and identify when your recipients move to different locations via NCOA processing.

Users can simply type their queries on our console for single verification. However, bulk verification only accepts CSV files.

Yes, PostGrid's API provides standardization support to cleanse, parse, format, validate, and verify your postal addresses according to local postal standards. Uncleaned, inaccurate, incorrect, unstandardized, and outdated addresses can ruin your postal efficiency.

Our API helps you fix errors, correct misspellings, check abbreviations, add delivery point validation codes, and run national and international add verification checks.

Users can use our API as an Address Verification Service (AVS) to avoid credit card and other types of fraud. It cross-verifies the address and ZIP code of the customer's location and bank records.

Businesses can use this strong mechanism to eliminate the chances of unauthorized users misusing credit information in online stores.

Yes, PostGrid's address verification provides transliteration features to support various international languages, such as Chinese (China), Cyrillic (Russia), Hebrew (Israel), Thai (Thailand), Kanji (Japan), and Arabic (United Arab Emirates).

We also transliterate any address into Latin from native languages for better understanding. It helps the respective postal office deliver the mail easily and without confusion.

Our API works in real time to verify your addresses. It eliminates the wastage of time and resources due to incorrect or incomplete addresses. A company could save time and increase ROI by verifying thousands of addresses in seconds. There's no need to manually verify and standardize your address data.

PostGrid features one of the most popular address lookup APIs that provide businesses with accurate postal address data. We have certification from the Coding Accuracy Support System (CASS).

It means that our solution is a reliable source of information that the USPS approves. PostGrid provides a ZIP+4 code lookup, ensuring faster and more accurate postal deliveries.

Yes! You can use PostGrid to look for ZIP Codes. With our ZIP Code API, you verify US Zip Codes without having to highlight the complete address. In case the zipcode is available in the USPS's database, our API will automatically return the information on that specific zip code. And, if the zip code is incorrect, we will return an error message mentioning the INVALID ZIP CODE.

Yes, PostGrid's Address Verification API supports PO Box addresses for its comprehensive validation, verification, standardization, and parsing process. We ensure that the details you provided match the official records. The API quickly identifies the PO Box address components if they are incorrect or incomplete. It also gives you recommendations on how to modify the address accordingly.

Every geocoding result includes an accuracy score, which helps users determine the accuracy level of the geocoding process. Our API also fetches latitude and longitude data for any address you need. It helps you understand the demographics and geographical information of a specific location for better business analytics.

This data is often critical for tracking, mapping, and spatial analysis. Businesses rely on it to improve their mailing and overall operations.

Our API's reverse geocoding feature lets you convert geographic coordinates into readable addresses. This feature is useful for location analytics and validating postal addresses in payment and shipment forms.

Global businesses with multiple locations often need this to gather better customer intelligence.

The efficient movement of goods and commodities across the supply chain requires accurate address verification. Incorrect addresses often lead to additional costs, reduced sales, and negative carrier relationships.

Our API saves these companies' critical time and resources handling complex supply chains and logistics. Accurate address verification helps to smoothen the flow of items.

You can integrate our API into your website or application to simplify the address collection experience. Your customers don't need to type their entire address as our address autocomplete feature handles the rest.

It drastically reduces the chances of collecting incorrect or incomplete address data. Customers enjoy a frictionless onboarding experience.

PostGrid's API is a highly scalable solution that provides constant availability of its services. We host our data on Amazon Web services to ensure the best uptime for your address verification tasks.

We verify all your address verification requests against the official USPS address database. However, we also consider third-party sources to ensure the maximum accuracy of the verification results.

Our address verification API also considers the official UPS address database and other postal carriers like FedEx to give accurate results.

Yes, specific compliance requirements depend on the industry where you operate. For example, financial institutions must comply with Know Your Customer (KYC) regulations, while healthcare organizations must adhere to HIPAA or PIPEDA compliance.

The process is quite simple, like verifying standard addresses. You only have to ensure that the address adheres to the standard military format before uploading it to our verification platform. Military addresses usually include the service individual's full name, unit, and APO/FPO/DPO address with a 9-digit ZIP code.

Easily Improve your workflow and automate print and mail through seamless integration capabilities.

Yes, Transliteration at PostGrid helps you to choose the response language. However, our default language is English. In case you have international address verification requirements can set the response to easily match the native language of their end-user.

For instance, if you keep thinking about- How address verification helps eCommerce businesses?- Well, the answer is yes. If you are an American eCommerce company operating in Germany or Russia, you can set responses to return in Russian characters against English. The response setting as well as the customization is only available to those, who are sending in API requests.

Reduced Mail Returns
Address verification primarily solves the problem of deliverability. USPS faces this issue every day when carriers are unable to locate the mentioned address and must return the mailers to the post office. Validating addresses beforehand ensures every address is complete and accurate. It reduces mail returns and deliverability problems by adding missing ZIP codes and standardizing the components. Also, it uses fuzzy address searching to ensure your addresses have no misspellings, incorrect abbreviations, or invalid street directionals.

Data Security
Industries like healthcare, finance, and legal require secure handling of sensitive information. Address verification helps you send documents and marketing materials to verified, deliverable addresses to reduce the risk of data breaches or regulatory violations by sending mail to incorrect recipients.

Enhanced Customer Data Quality
Incorrect or outdated addresses can clutter databases and cause inefficiencies. Address verification cleans the address data, keeping CRM and mailing lists accurate. Hence, businesses have reliable information for communications, marketing, and reporting. It leads to better decision-making and stronger customer relationships.

Ecommerce Shipping
Validating and standardizing buyer addresses ensures packages are delivered to the correct location the first time. It induces faster deliveries to help you complete orders as promised to customers within the estimated delivery time.

Billing and Invoicing
Address verification helps companies send invoices and bills to accurate addresses. It reduces delays in payments and avoids disputes.

Mail Marketing Campaigns
Accurate addresses are critical for marketing campaigns. Address verification ensures promotional materials, flyers, or thank-you notes reach the right audience. Thus, it helps you boost engagement and response rates while reducing wasted mail and printing costs.

High Reliability
Our system is meant to handle high volumes of addresses with consistent performance. Also, our uptime is 99.99%, so you can trust the platform to process addresses without downtime or delays.

Better Accuracy
We use CASS-certified validation and real-time checks against postal databases. Hence, you can ensure every address is correct, complete, and standardized as per the USPS.

Lightning Speeds
Real-time API integration allows immediate validation on forms, ecommerce checkouts, or databases. It helps you ensure minimal wait times to keep your workflows fast and efficient, even at scale. PostGrid’s Address Verification solution can check up to a million addresses in a go in less than two hours.

Easy Setup
PostGrid offers simple integration with your CRM, website, or software via APIs and pre-built connectors. Businesses can start verifying addresses quickly, making the solution accessible for teams without extensive technical expertise.