A barcode scan with the idcheck signal request typically returns decoded barcode data along with a processResult value of DocumentProcessOK. But a value of DocumentUnknown is also possible.

Full, Partial, or No Barcode Data

A DocumentUnknown process result can be returned along with some amount of decoded barcode data in the idcheck response. Or there may be no barcode data returned at all.

A response with some barcode data means we found the barcode format in our database.
A response with no barcode data means that we did not recognize the barcode format in our database.

Authenticity

The amount of decoded barcode data returned does not provide an indication about authenticity. Authenticity is indicated by the processResult value. We authenticate a barcode when we match the barcode to our database of known barcode formats. Barcode formats are specified by issuing jurisdictions.

A processResult value of DocumentProcessOK means that we successfully authenticated the barcode as fully following the jurisdictional barcode specifications.
A processResult value of DocumentUnknown means that we were unable to authenticate the barcode. This could be due to various reasons. See ID Verification processResult Definitions.

When to Contact Intellicheck

If DocumentProcessOK is returned for a known inauthentic ID document (for example, a fake driver's license).
If DocumentUnknown is returned for a known authentic ID document.

Contact Intellicheck support to open an investigation. We will need the transaction ID or the transactionIdentifier value.

Conclusion

Regardless of the amount of barcode data returned, a processResult value of DocumentUnknown should be considered a potentially inauthentic ID document. Contact Intellicheck if the processResult value contradicts what you know to be true regarding the ID document (therefore, in the case of a false positive or a false negative result).