Zip code validation is the process of checking whether a postal code is valid. It involves checking that it is formatted correctly and not a duplicate. A valid zip code contains at least 5 digits, and can also have a hyphen after it. The process of validating a zip code is crucial because it ensures that the input is accurate.
If you find that your billing zip code does not match your bank's data, contact the issuing bank. It may take some time for a new card to be issued, but it is always wise to call and confirm the details. This way, you can avoid zip code errors. The problem is solved when you can use the bank's zip code instead of your own.
With proper ZIP code validation, you can ensure that your direct mail is delivered to the right addresses. This will reduce the number of returned mails, resulting in less waste of resources and time. For instance, you may send out a thousand postcards, but if only 10% of them are returned, you will be saving a lot of money.
Aside from the USPS, FedEx also offers postal code validation. You can make use of the Postal Code Validation API, which enables you to validate your postal codes in order to ship out your packages. It also offers validation for cities and countries.
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