The Premier League is considering whether to allow West Ham's Javier Mascherano to join Liverpool.
Mascherano has played for West Ham and Corinthians since July
Mascherano's registration documents were sent to the Premier League before the transfer window closed.
But a Premier League statement said it wants to "take time to satisfy itself with the proposed arrangements".
Fifa has granted dispensation for the Argentine, 22, to join Liverpool even though he has already played for two clubs since 1 July last year.
Mascherano, who arrived at Upton Park with international team-mate Carlos Tevez on 31 August, will not be able to play for Liverpool while his transfer is under consideration.
"The Premier League can confirm that, in accordance with its rules, Javier
Mascherano's registration documents were received from Liverpool FC prior to the transfer window closing," said the Premier League statement.
"The board will consider the terms of the registration as quickly as possible and notify the parties involved of its decision accordingly."
Under Fifa's rules, a footballer cannot play competitively for more than two different clubs between 1 July and 30 June the following year.
Mascherano, 22, has already represented Corinthians and West Ham in that time.
But Fifa said: "The Fifa single judge ruled that Javier Mascherano is eligible to play in official matches with Liverpool with immediate effect."
In the statement Fifa explained its ruling was determined partly because the South American and European seasons overlap.
Mascherano has played only six minutes for West Ham since the defeat at Tottenham on 22 October and had been desperate to leave the club.