Italian law enforcement agency 'Guardia di Finanza', carried out a raid against a sports agent and his company.
There is an ongoing investigation with the said agent and thus, documents were requested from 11 Italian clubs including AC Milan: Juventus, Inter, Napoli, Roma, Torino, Fiorentina, Cagliari, Verona, SPAL and Frosinone.
The hypothesised offenses are of a fiscal nature, money laundering and self-laundering.
Source: MilanPress.it
Update: According to Sportface, agent Fali Ramadani is the one under investigation.