For many years TES 6 has been surrounded by rumours of corruption. In February 2012 the Slovene State Commission for the Prevention of Corruption published a report stating that acts of corruption could have influenced the awarding of the contract to French company ALSTOM and that the law on the state guarantee itself was initially drafted by employees of HSE, the owner of the Sostanj power complex.
Slovene NGO Focus Association for Sustainable Development has translated the report to English. (The original report (in Slovenian language) is available for download here (pdf).)