Barcelona have revealed their dissatisfaction after the Court of Arbitration for Sport upheld FIFA's two-window transfer ban for the Catalan outfit.
Barca were found to have breached rules on signing youth players and were therefore hit with the sanction in April.
The Spanish side took their appeal to the CAS, but that was dismissed on Tuesday – a decision that has been heavily criticised by the club.
"FC Barcelona wants to state its total disagreement with the decision of CAS reported on Tuesday which confirms the sanctions imposed by Fifa as a result of alleged violation of the rules on international transfers of players under age," a club statement read.
"The club has made it clear to the Fifa Disciplinary Committee, the FIFA Appeals Committee and to CAS, that it shares and supports the policy of protection of minors and concern for their development and training.
"This is confirmed by the conduct of the club throughout its history, and it has become a world example in terms of schooling and teaching of young players and the formative work carried out. The structure of the FC Barcelona training setup has enabled hundreds of young players to fulfil their dreams and train as people.
"Errors that the club may have made, and which have been recognised and argued by the relevant authorities are, in any event, administrative and caused largely by the existing regulatory conflict between the regulations of Fifa and the Spanish legislation. The conviction of the club was that it acted correctly.
"Therefore, FC Barcelona considered the sanction completely disproportionate, as it represents far too heavy a punishment for the club when taking into account our background and the circumstances in this particular case.
"In this sense, when the club is notified of the legal basis for CAS' decision, we shall study and assess the various legal options available, including the possibility of challenging the CAS decision at the Swiss Federal Tribunal."
As it stands, Barca cannot sign any new players until January 2016.
Matt Law
