Ethics prosecutor Michael Garcia's appeal against the handling of his World Cup bid investigation was dismissed by FIFA.
FIFA said Garcia's case was ruled "not admissible'' by the appeals panel.
The former US Attorney had objected to ethics judge Joachim Eckert's summary of the World Cup bid investigation, claiming "numerous materially incomplete and erroneous representations'' of his work.
Eckert sought to close down the case against all nine bidding candidates.
Russia won the right to host the World Cup in 2018 and Qatar won the vote for the 2022 tournament.
However, Eckert's report "does not constitute a decision ... and as such is neither legally binding nor appealable',' FIFA said in a statement.
FIFA also provided further legal opinion in a background paper on its website.
"In doing so, the chairman (Eckert) had merely commented on the report of (Garcia's) investigatory chamber on a voluntary basis,'' the FIFA paper said. It is unclear if Garcia can now take his appeal to the Court of Arbitration for Sport.
The ruling was published less than one hour after FIFA announced a disciplinary committee judgment dismissing complaints by two whistleblowers who were interviewed during the probe.