http://www.autosport.com/news/report.php/id/118116
""There has been a lot of speculation in the media over the past week, so I want to set out clearly that my sponsors paid the sponsorship fee related to the 2015 season in its entirety to Sauber in the first half of 2014.

"This was simply in good faith and to help the team deal with its cash problems at the time. Effectively, it was my sponsor's advanced payments that helped the team survive in 2014.
"