The club has been asked to pay damages to their former player or face a ban.
Egyptian club Zamalek are facing a freeze on new players next summer if they do not pay EGP150,000 to their former player Mohamed Abdullah.
The Egyptian FA has penalised the club for terminating the deal of Abdullah without informing him beforehand in the summer of 2009.
Abdullah sought damages from Zamalek because 'he could have failed in his attempts to join a new club'.
The versatile midfielder joined Alexandria-based club Ittihad before eventually moving to Egyptian Premier League basement-dwellers Asyut Petroleum in January.
"The EFA competition committee has decided to ban Zamalek from registering any new players in the coming transfer window," the EFA said in a statement on its official website.
"The ban will be lifted if Zamalek pay EGP150,000 to Mohamed Abdullah."
The White Knights, who said they intend to reinforce their frontline in the summer, are yet to comment on the EFA's decision.
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