The Premier League will dock £1m from Portsmouth's parachute payment for 2011 unless Pompey pay that sum to Tottenham over an aborted transfer.
The two clubs agreed a combined fee for Younes Kaboul and Asmir Begovic, and Spurs made an immediate payment.
However, Begovic did not join Spurs and ended up moving to Stoke, in which circumstances, the deal stipulated, Spurs would be repaid £1m.
The Premier League says it will pass the £1m withheld directly to Spurs.
Tottenham revealed in a statement earlier this year: "Our original agreement with Portsmouth was for the purchase of two players for a combined, agreed price.
"The transfer of Younes Kaboul was completed and Portsmouth pressed for an immediate payment to alleviate their cashflow situation.
"To assist Portsmouth with their financial difficulties we paid Portsmouth an agreed sum of money, whilst at the same time concluding an agreement that, should Begovic be sold or loaned to any club other than ourselves, we would be repaid the sum of £1m.
"Portsmouth were keen to openly and freely agree to this surety."
Posted: Fri Sep 17, 2010 3:15 pm