Don't forget the biometrics

Denmark issued 10,947 passports without fingerprints (Customs Today)

The different municipalities of Denmark issued flawed passports without fingerprints, stated by the Customs authority. Earlier the Customs authorities discovered the mistake and informed the affect municipalities. Passports issued from 44 municipalities after the date of February 2nd are missing biometric fingerprints due to an error made by...

I wonder how the oversight was discovered.