Introduction
When it comes to sending mail, packages, and other items, having accurate address information is essential to ensure that the item reaches its intended recipient. This process is known as address verification and is especially important when dealing with the United States Postal Service (USPS). With this in mind, it’s important to understand how to best verify an address with USPS.
Address verification is the process of confirming that an address is valid and correctly formatted according to the standards set by USPS. It involves checking the accuracy of street numbers, city names, zip codes, and other address components. By verifying an address, you can ensure that your mail or package will be delivered to the right place without any delays or confusion.
The importance of verifying an address cannot be overstated. Without accurate address information, your mail or package may not reach its intended recipient or may be sent to the wrong person. In addition, incorrect addresses can lead to higher costs for postage and other shipping fees.

Compare USPS Address Verification Services
When it comes to verifying an address with USPS, there are a number of different services available. Depending on your specific needs, one service may be more appropriate than another.
USPS Address Verification APIs
USPS offers a range of address verification Application Programming Interfaces (APIs) which allow users to quickly and easily check the accuracy of an address. These APIs are offered in both real-time and batch mode and can be used to check residential and commercial addresses.
USPS ZIP+4 Lookup Tool
The USPS ZIP+4 Lookup tool is an online resource that allows users to quickly and easily look up ZIP+4 codes for an address. This tool is free to use and provides users with detailed information about the address, including the full 9-digit ZIP Code.
USPS National Change of Address Database
For businesses that regularly send out mailings, the USPS National Change of Address (NCOA) Database is an invaluable resource. The NCOA database contains information about individuals and businesses who have moved within the last 48 months. By using this database, businesses can keep their mailing lists up-to-date and ensure that their mailings are reaching the correct recipients.

Review USPS Address Standards and Guidelines
In order to ensure that your mail or package is delivered correctly, it’s important to review the USPS address standards and guidelines. These standards and guidelines outline the format that an address must adhere to in order to be considered valid by the USPS.
USPS Address Standards
The USPS has established a set of address standards that all addresses must meet in order to be considered valid. These standards include the following:
- The address must include a house number, street name, city, state, and ZIP code.
- The address must be complete and accurate.
- The address must use standard abbreviations.
- The address must not contain any unnecessary punctuation or symbols.
USPS Address Guidelines
In addition to the address standards, the USPS also has a set of guidelines that should be followed when formatting an address. These guidelines include the following:
- Always use the full street name, such as “Street” instead of “St.” or “Drive” instead of “Dr.”
- Always include apartment or suite numbers after the street name.
- Always use the two-letter abbreviation for the state.
- Always use the five-digit ZIP code.
Utilize USPS Delivery Confirmation Services
Another way to verify an address with USPS is to utilize their delivery confirmation services. Delivery confirmation is a service offered by USPS that allows you to track the status of your mail or package and confirm that it was delivered to the correct address.
Overview of Delivery Confirmation Services
USPS delivery confirmation services come in two forms: Delivery Confirmation and Signature Confirmation. Delivery Confirmation provides proof that the mail or package was delivered to the recipient’s address, while Signature Confirmation requires the recipient to sign for the mail or package.
Advantages of Delivery Confirmation Services
Using USPS delivery confirmation services has a number of advantages. First, it provides peace of mind that your mail or package was delivered to the correct address. Second, it allows you to track the status of your mail or package and make sure that it is moving through the system. Finally, it helps to reduce the risk of fraud or identity theft by providing proof of delivery.

Confirm Address Accuracy by Mailing a Letter or Postcard
Another way to verify an address with USPS is to send a letter or postcard to the address in question. This is a simple and effective way to confirm that the address is correct and the recipient lives at that address.
Step-by-step Guide to Mailing a Letter or Postcard
- Purchase a stamp and address the envelope or postcard.
- Write a message on the envelope or postcard.
- Drop the envelope or postcard in the mail.
- Wait for the recipient to receive and respond to the letter or postcard.
Benefits of Mailing a Letter or Postcard
Mailing a letter or postcard is a great way to confirm the accuracy of an address. Not only does it provide proof that the address is correct, but it also allows you to establish a connection with the recipient. This can be especially useful if you are sending a package or other item that requires a signature upon delivery.
Conclusion
Verifying an address with USPS is an important step in ensuring that your mail or package is delivered correctly. There are a number of different services available for verifying an address, including USPS APIs, the ZIP+4 Lookup Tool, and the NCOA Database. It is also important to review the USPS address standards and guidelines to make sure that the address is properly formatted. Finally, USPS delivery confirmation services and mailing a letter or postcard are great ways to confirm the accuracy of an address.
By taking the time to verify an address with USPS, you can ensure that your mail or package will be delivered to the right place without any delays or confusion. This will save you time, money, and hassle in the long run.
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