IDR legal entity validation accuracy

We have switched on the validation on legal entity from invoice to validate against PO. For our tax compliance we need to understand the matching accuracy of this validation. For example we have seen:

Correct legal entity ITV Broadcasting Limited - IDR has allowed Broadcasting Ltd

Correct legal entity ITV Services Limited - IDR has allowed Services Ltd

We are concerned about our tax compliance if invoices are being processed that are not correctly addressed to the right legal entity name. We need to understand the matching accuracy to enable us to mitigate any risks.