FIFA has denied a request from Chelsea to postpone their transfer ban while they appeal the punishment.
Chelsea could now ask the Court of Arbitration for Sport (CAS) to grant an interim ruling, which would allow players to be signed in the off season.
Chelsea were banned from registering new players through January 2020 for breaking rules designed to protect teenage players.
The Premier League side were also fined more than £460,000, while the FA face a £390,000 sanction that they will also appeal, citing "concerns" with FIFA's disciplinary processes.
The west London club were found guilty of 29 incidences of breaching article 19, which relates to the transfer of players aged under 18.
The club denies any wrongdoing and "categorically refutes the finding of the FIFA Disciplinary Committee"
In previous similar cases involving top Spanish clubs, FIFA granted provisional measures which meant transfer bans were not enforced during the appeal process.
The FIFA appeal panel chairman, Thomas Bodstrom, joined soccer's governing body after those Spanish cases were decided.
Chelsea were given a transfer ban in 2009 after there was a complaint about the youth player Gael Kakuta joining illegally two years earlier. Chelsea appealed that and had the ban reduced.
sizdelpy
271
Remove the mask UEFA,we know you're Kepa.
Casio
244
So you're telling me it took FIFA 4 days to analyse and reject our appeal. The same appeal that was granted to the likes of PSG and Barcelona. Need Chelsea to take further action this is simply unfair...
CFC4life
203
Just more proof that fifa favors Spanish clubs
fikklnou
167
All Chelsea has to do is to apply a lil bit of patience, January is just here.
Electrons18
152
Fifa toothless board, make football great by coming up with good referees not those minor issues.. I don't c any reason to be worried by signing a under 16 footballer..Fifa is a just impediment or is spoiling the entertainment instead of supporting it... Many grey areas on use of Var, refs make mistakes, no any legal board to rule out if ref made a mistakes, like replays etc Fifa only likes money is simple