There have always been rumors that candidates buy votes. Occasionally, these rumors are confirmed when the ballot boxes are opened and the counting of votes begin.
“In municipality of Kalavryta in Peloponnese, an envelope was found to contain not only a ballot but also a 50-euro banknote.
Apparently, the candidate gave the envelope to the voter who did not open it and therefore he cast his vote together letting the bribe inside.” (source: thebest.gr via To Pontiki)
PS rumors that the voter asked the money back lay in the sphere of fantasy