German to English Law/Patents Computers: Software Data matching/security checks

One of those words that do my head in because there are too many options.

Not sure how to best render this sentence.

Welche Abweichungen in den Daten zur Personenidentifikation lösen eine Überprüfung aus?

Which differences/deviations in the data used to uniquly identify the person will cause such data to be screened again....?

Background: personal data that needs to be checked by the BKA before they can issue the person with a pass that will allow them to go into secure sections of building where a very important (political) ceremony is to take place.