Swansea will appear before the Court of Arbitration for Sport (CAS) over the transfer of former Utrecht goalkeeper Michel Vorm to Tottenham in 2014.
Vorm joined the Swans in 2011 from the Eredivisie outfit and spent three years at the Liberty Stadium before making the switch to Premier League rivals Spurs.
The Dutch club claim they are owed a portion of that transfer fee due to a 30% sell-on clause they say was included in the deal which took the Netherlands international to Wales.
The Swans, who insist Vorm left on a free transfer, will put their case forward to CAS on 29 January 2016. However, Utrecht will feel they have a strong claim as the keeper still had two years left on his contract with the Welsh side before leaving for London.
A spokesperson for Swansea said: "The transfer of Michel Vorm was conducted and concluded correctly under Premier League rules. It was approved by the Premier League and also FIFA via their TMS (Transfer Matching System).
"While we have been in contact with Utrecht as a matter of courtesy, we will continue to conduct our business in the best interest of our football club and our supporters, and not based on the views of other clubs.
"Unlike some countries abroad, we do not have third party ownership of players in Britain. The club will not be commenting further on this matter."