Euro 2004 was his last major international tournament, as in February 2005, as he reached the mandatory retirement age. His last international match was Portugal – Slovakia, for a 2006 FIFA World Cup qualifier at Estádio da Luz in Lisbon. The FIGC raised its mandatory retirement age to 46 in order to accommodate Collina for a further season. However, a dispute emerged between the federation and Collina early in August 2005, following his decision to sign a sponsorship deal with Opel (also advertising for Vauxhall Motors in the United Kingdom – both are owned by General Motors). As Opel was also a sponsor of Serie A club A.C. Milan, the deal was seen as a conflict of interest, and Collina was not allowed to referee top flight matches in Italy. In response, Collina handed in his resignation, effectively ending his career. The Italian Referees Association then attempted to reject his resignation, but he persisted with his retirement from the league. Collina attracted the ire of Luciano Moggi, the Juventus executive and chief instigator of the 2006 Italian football scandal. Collina was one of the referees that Moggi attempted to have punished for decisions that were made against Juventus. In an intercepted phone call, Moggi claimed that Collina and his colleague Roberto Rosetti were too "objective" and should be "punished" for it. As a result, he and Rosetti were two of the few referees that emerged unscathed from the scandal. After retiring from Serie A, Collina refereed the Soccer Aid matches for charity in May 2006 and September 2008. During the latter of these games, Collina was involved in an awkward fall and was stretchered off after 21 minutes of play. He later refereed the first half of the 2010 Soccer Aid match. His final competitive game was a Champions League qualifier between Everton and Villarreal on 24 August 2005. He announced his retirement soon after the game. Later career Collina was appointed head of referees for the Football Federation of Ukraine since 2010. His work in this position is criticised by national referees who disapprove of his lack of involvement in Ukrainian football (spending not more than two weeks per year in Ukraine) and possible tolerance towards corruption in the Ukrainian national football association. Collina was involved in the introduction and evaluation of the video assistant referee system for the 2018 World Cup. During the tournament he pointed out the