Russian Anti-Doping Agency (RUSADA) director general Yuri Ganus claimed that "unacceptable" allegations of corruption posted on instant messaging platform Telegram was an attempt to "discredit" his organisation.
A Telegram user called "The post truth" accused Ganus of "conflict of interest and corruption".
It is alleged that Ganus appropriated at least 57 million rubles (£636,000/$801,000/€709,000) for 2018 and 53 million rubles (£591,000/$745,000/€660,000) for 2019.
The user also claimed that Ganus used RUSADA money to pay for taxis and English lessons, while officials were able to take holidays on the pretence that they were international business trips.
At the end of the accusation, it is suggested a criminal case is set to be launched in the near future.