Paolo Bertini started refereeing in the Italian Serie A in 1999. He hasn't officiated more than a few UEFA cup matches and (was) retired at the end of 2007. He was accused of being part of the Italian Scandal "Calciopoli".
SIM cards
He was more or less aquitted in 2006, but in 2007 Italian prosecutors discovered some worrying details from SIM cards used by Luciano Moggi, the match fixer and Juventus boss. The cards were bought in Switzerland. During the 24 hours preceding the match Juventus-A.C. Milan in 2004 there had been a series of 13 telephone calls between Moggi and Bertini, the referee of that match. They also discovered a series of 18 telephone calls between Bertini and Fabiani, the Messina manager. Bertini was suspended for a year and a half.
(source: wikipedia)