Address verification ensures that the addresses you're mailing to actually exist and are mailable. It helps you eliminate waste, improve operational efficiency, reduce costs, and enhance customer satisfaction. There are many things that can go wrong with an address, such as human entry errors, zoning changes, new construction, changing local laws, and annexation. With USPS address validation, you can be sure that the addresses you're using are valid, accurate, and deliverable.
Address validation software checks to see if an address is valid by running it through CASS. It also makes sure that the format is correct and standardized. This process helps prevent your mail from being delivered to the wrong place and saves you money on postage and packaging.
You can use an online USPS address validation tool or integrate a CASS-certified API into your website or application to get the best results. Most address validation services offer bulk processing to check large lists of addresses at once. Some can even check international addresses. Some can even tell you if an address is a PO Box or not.
The reason why some addresses return as invalid is because they're not on the official postal database. This may be due to a new building being constructed or because the occupants don't want to receive direct mails.
This is a great way to check if an address is valid, but it doesn't confirm whether or not someone works there. It's also possible that an address returns as invalid because it's fake or no longer exists.
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