German lawyer Guenter Hirsch has resigned from FIFA's ethics commission after claiming the football's governing body had "no real interest" in tackling allegations of corruption
Mr Hirsch's decision to quit comes just weeks after Russia and Qatar were awarded the 2018 and 2022 World Cups respectively in controversial circumstances following allegations of corruption before and during the election.
In a letter to ethics commission president Claudio Sulser, he said: "The events of the past few weeks have raised and strengthened the impression that responsible persons in FIFA have no real interest in playing an active role in resolving, punishing and avoiding violations against ethic regulations of FIFA."
FIFA have questioned Hirsch's attendance record at ethics committee meetings and responded by issuing a statement which read: "As an independent judicial body, the [ethics] committee has decision-making power and the option to establish any sanctions they deem appropriate.
"Notably, the ethics committee had the mandate to overlook the bidding process for the 2018 and 2022 FIFA World Cups and to ensure that the rules of conduct and the Code of Ethics were adhered to during this process."
The statement added: "Hirsch was a member of the ethics committee since the creation of this committee and attended the inaugural meeting in October 2006.
"Since then, Hirsch has not attended any other meetings of the committee, despite being invited to attend every meeting held in the past four years."