![The Origins of ZIP+4 for Address Validation](https://www.serviceobjects.com/blog/wp-content/plugins/pt-content-views-pro/public/assets/images/lazy_image.png)
The Origins of ZIP+4 for Address Validation
Updated from original post Why 5-Digit ZIP Codes Don't Work, published 09/29/10 According to the 2014 audit report from the United States Postal Service's Office of Inspector General, ...
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