The PL8-RDR system supports fuzzy searching based on user supplied values.
In the case of the LPR system "seeing" ABC123, it will also validate against A8C123 and ABC128 or A8C12B.
You can improve plate reads by making corrections and verifying correct plates on the system. OPS-COM has an algorithm that includes the human updates as part of the read score. So essentially if a plate is misread and corrected, it is very probable that the system will return the (human) updated version.