In an open letter to Kazakh Prosecutor-General Rashid Tusupbekov and the Organization for Security and Cooperation in Europe (OSCE) observer mission in Kazakhstan, Aliev urged them to disallow the president's party from competing in the elections because of its allegedly illegal use of funds.
Aliev claimed the Nur Otan party -- led by President Nursultan Nazarbaev -- has illegally spent $100 million from a "secret fund" for its election campaign.
Aliev wrote that he is ready to go to any court to prove his claims.
Aliev, Kazakhstan's former ambassador in Vienna, is wanted by the Kazakh authorities for his alleged involvement in the kidnapping and disappearance of two bank officials.
An Austrian court has rejected Astana's demand to extradite Aliev, warning that he would not be guaranteed a fair trial in Kazakhstan.