A national court may, in the event of fraud, disapply the social security certificate of a posted worker in the European Union in the case of fraud linked to the issue of the E101 certificates of posted workers if the certificate was obtained or used fraudulently.
Such fraud is a threat to the coherence of the Member States’ social security schemes and use of a fraudulent E101 is a form of unfair competition undermining the equality of working conditions.
This is the gist of conclusions...