Chelsea have made a formal request for their FIFA transfer ban to be suspended, pending the outcome of an appeal against the penalty handed down by world football's governing body.
The Blues are facing a two-transfer window ban if the punishment is upheld by the Court of Arbitration for Sport, with Chelsea in trouble for luring Gael Kakuta away from French club Lens.
A statement on the official CAS website read: "Chelsea Football Club and Gael Kakuta have filed appeals at the Court of Arbitration for Sport against the decision issued by the FIFA Dispute Resolution Chamber on 27 August 2009.
"Both Chelsea FC and Kakuta have requested that the FIFA decision be stayed pending the outcome of the CAS arbitration.
"A decision concerning the request for a stay is likely to be issued by the CAS at the beginning of November."
If Chelsea are unsuccessful with their appeal, they will be unable to sign any new players until January 2011.