West Ham have decided against an appeal over the £5.5m fine over the transfers of Carlos Tevez and Javier Mascherano.
The double Argentine deal has proved costly for West Ham
The Hammers were found guilty of acting improperly and withholding vital documentation over the duo's ownership.
The record fine has been criticised by four of the Upton Park outfit's relegation rivals who felt the club should have been deducted points.
Charlton, Fulham, Sheffield United and Wigan are now seeking advice about legal action against the outcome.
West Ham chairman Eggert Magnusson said: "I think it is now time to draw a line under this matter.
"The fine imposed on us was very significant but we accept that mistakes were made and it is now time to move on."
West Ham need at least a point at Manchester united on Sunday to guarantee their Premiership survival.
But if they lose and Wigan beat Sheffield United then Hammers are almost certain to be relegated.
Magnusson added: "Our intention as a club is to be totally focused on Sunday's game.
"We know that our fate, like every other club, will be decided, where it should be, on the pitch."