Reasons Behind Address Validation Error Or Invalid Address
The first step to ensuring the integrity of your addresses is at the point of input. Even the most sophisticated address verification systems cannot correct bad data that comes in through a web form unless it is properly screened. Ideally, this is done by incorporating the address validation process directly into your website’s form, or by using an API to validate addresses at the source.
Unsurprisingly, the biggest reason why addresses fail to validate is due to human error. This can take the form of severe misspellings, flipping or scrambling numbers in street addresses or postal codes, or putting in an imaginary address that does not exist. This can be the result of a typo in the database, or it could be because the address has been recently built or occupied and the post office has not had time to enter it into the system.
In other cases, the address might be in a country that does not allow direct mail delivery or is too dangerous for postmen to go to. This includes everything from PO box only ZIP Codes in the US to war-torn areas of third-world countries. In these situations, the addresses will not be able to be validated because they do not exist in the system.
Finally, some addresses can be returned as invalid because they are missing key information. This is particularly common in apartment buildings and other multi-tenant environments where the primary street address may be 123 Main St, but there might also be additional internal dwellings or sections with distinct internal house numbering. Address parsing and standardization can not add in these missing details, so the addresses will be invalidated and returned as such during the validation process.
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