The dates of the Football League play-off semi-finals could be changed if QPR are deducted points over the Alejandro Faurlin signing, BBC Sport understands.
QPR were promoted from the Championship after defeating Watford on Saturday but face a Football Association hearing this week.
It relates to seven charges centering on the third-party ownership of the Argentine, who joined the club in 2009.
The League has held initial talks with clubs likely to be in the play-offs.
These have focused on the possibility of dates being changed if the Hoops lodge an appeal in the event of a points deduction.
The Championship play-off semi-finals are scheduled to take place on 12, 13, 16 and 17 May, with the final at Wembley on Monday 30 May.
It is unclear whether moving the Championship dates could impact on the League One and League Two fixtures, with all the matches scheduled to take place on different days.
However, it is understood that the dates for the play-off finals cannot be moved.
That means the League Two and League One finals will take place at Old Trafford on 28 and 29 May, before the Championship final at Wembley brings down the curtain on the Football League season.
The FA hearing starts on Tuesday and a verdict is expected on Friday, the day before QPR play Leeds on the final day of the regular season.
QPR and their chairman Gianni Paladini have denied all the charges against them.
The FA has been investigating the case since September, when QPR asked for permission to buy out a third party that owned Faurlin's economic rights.
QPR were prompted to do this by the Football League's introduction of rules prohibiting the third-party ownership of players.
The League told QPR that they would have to notify the FA of their plans and it then became apparent the club may have been in breach of FA regulations for more than a year.