The Dutch side have threatened to report Swansea to FIFA after claiming they had reneged on the terms of an agreement struck when Vorm joined the club in a £1.5m deal in 2011.
Vorm was a member of Holland's squad at the World Cup in Brazil and moved to Tottenham last month for what Swansea described as an undisclosed fee.
And Swansea insist they have done everything by the book with respect to Vorm’s transfer to White Hart Lane.
"The transfer of Michel Vorm was conducted and concluded correctly under Premier League rules," a Swansea spokesman said.
"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."