Is the anti-mafia certificate really useful?

A provocative suggestion made by Piero Grasso - the national anti-mafia prosecutor - is to change the certificate of non-involvement in organised crime into a sort of "white-list" of good-behaving enterprises. The presence of the anti-mafia certificate currently influences the issuance of licences by the Public Administration and the very possibility of entering into contracts with the Public Administration, but this system can be simply eluded by the use of figureheads.