Shakhtar Donetsk have issued a demand for €50million (£43m) in damages from FIFA over lost transfer fees amid their player exodus following Russia's invasion of Ukraine.
Football's governing body previously ruled that foreign players would be able to suspend contracts and seek a new club in another country amid the war.
Shakhtar chief executive Sergei Palkin stated that agents were profiting from the situation and taking payment for deals rather than the Ukrainian Premier League club.
The club have now appealed to the Court of Arbitration for Sport (CAS).
"We had to do this because of FIFA's highly unfair ruling," Palkin told BBC Sport. "The consequences mean we will continue to lose significant income from deals we expected to close.
"We would also like to highlight that given the situation Ukrainian clubs are facing with the war, there has been little respect shown towards these clubs by FIFA.
"FIFA has not looked to protect clubs and at no stage consulted with us to find a solution - they have seemingly ignored the perilous state that Ukrainian football clubs have been facing since the beginning of the war."
FIFA's decision on June 21 gave Shakhtar and other Ukrainian clubs until June 30 to finalise sales before foreign players were able to unilaterally suspend contracts.
This has lead to several players allegedly halting pending transfers, before effectively being able to leave for free, with the club reportedly naming Manor Solomon and Tete as two such individuals.
"In absence of any reaction from FIFA, we will have no choice but to seek for damages compensation from the competent courts," added Palkin.
"I believe more meaningful support initiative to Ukrainian clubs is needed from FIFA."
Shakhtar meanwhile continue to train abroad, with the squad currently in the Netherlands, ahead of a hoped-for resumption of football back home in August.