The investigation confirmed that attempts were detected, but that they did not succeed due to the strict security procedures in place. The respective votes were subsequently declared invalid in accordance with contest rules.
No evidence was found to link any participating broadcaster to any improper activity or to suggest that any broadcaster was aware of the origin of the activity.
To strengthen the credibility of the voting and to further protect the Eurovision Song Contest brand, the Reference Group has tightened measures to ensure voting integrity.
If voting irregularities are detected before, during or after the contest in favour of any represented country, the Reference Group will automatically initiate procedures which carry a penalty of exclusion of the respective participating broadcaster from the contest for a maximum of three consecutive years.
"Just as football clubs are in principle accountable for the behaviour of their fans, we will hold – on a case-by-case basis – participating broadcasters accountable and make them responsible to prevent voting irregularities in favour of their entry," said Dr Frank Dieter Freiling, chairman of the Reference Group.
The voting is overseen by the EBU Executive Supervisor, voting partner Digame and observers from PwC.
"The winner of the Eurovision Song Contest is decided by professional juries and viewers at home, each having a 50 per cent stake in the result," says Jon Ola Sand, Executive Supervisor of the Contest, on behalf of the EBU. “In this contest, there is no place for organised attempts to unfairly influence the outcome.”
The 2014 Eurovision Song Contest will take place on 6, 8 and 10th of May in the Danish capital, Copenhagen, hosted by EUROVISION and Danish public broadcaster DR.