Masiello had surprisingly confessed to deliberately deflecting a shot from Lecce striker Jeda into his own net during a Serie A game against his former club in May 2011.
But the 26-year-old, who is without a club since leaving Atalanta, negotiated a plea bargain at a tribunal in Bari in order to avoid jail time, with his associates Gianni Carella and Fabio Giacobbe handed 17-month suspended sentences.
Bari had already been relegated, but Masiello's own goal guaranteed a 2-0 victory and survival for Lecce, who subsequently found themselves demoted to the Lega Pro this season for their involvement in match-fixing.
Bari had to start their Serie B campaign with a seven-point penalty following a wide-sweeping investigation into the 'Calcioscommesse' scandal that also saw Juventus manager Antonio Conte suspended for 10 months.
Concerns were raised over the last four games of Bari's 2010-11 campaign - Palermo-Bari, Bari-Sampdoria, Bari-Lecce and Bologna-Bari - with the results of those matches having a direct effect on the relegation positions and qualification for Europe.
Following Wednesday's decision in Bari, Masiello's lawyer told the Gazzetta dello Sport: "Andrea Masiello just wants to live in peace and not have to keep talking about himself."