FIFA has confirmed it has received Chelsea's appeal against their transfer ban.
However, the world football governing body insisted that no decision has been taken on freezing the sanction during the legal process.
Chelsea previously said they "categorically refute the findings of the FIFA Disciplinary Committee", and would be appealing the ban on registering new players for two transfer windows, which FIFA imposed for breaching rules to protect teenage players.
But FIFA, in a statement on Tuesday, said "there is no exact timetable" for Chelsea's case, and the appeal panel chairman must decide on freezing the punishment.
FIFA's disciplinary committee had imposed the two-window ban on Chelsea registering new players for breaches of regulations relating to the transfer of 29 players aged under 18.
Chelsea were also fined 600,000 Swiss francs (over £460,000) and the Football Association was fined 510,000 Swiss francs (over £390,000).
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