Sky sources understand FIFA is investigating the transfer of 
Netherlands goalkeeper Michel Vorm from Swansea to Tottenham 
after a formal complaint from his first club Utrecht.
The Eredivisie side claimed they were due a 30% sell-on fee but 
Swansea sources say it was a free transfer and the Dutch club are
not due any money.
Vorm came on as a 93rd-minute replacement in the third-placed World 
Cup play-off for the Netherlands in their 3-0 win over hosts Brazil.
The 30-year-old moved to the Liberty Stadium in July 2009 for £1.5million 
before signing a fresh deal at the club in September 2012 to take him up 
to the summer of 2016.
However, Spurs secured his signature, and that of Swans team-mate 
Ben Davies, last month.
Davies signed a five-year contract at White Hart Lane, while Vorm signed a 
four-year agreement. Iceland midfielder Gylfi Sigurdsson moved to south 
Wales as part of the deals.
Swansea previously said Vorm's transfer did not break any rules.
"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 o
f players in Britain. The club will not be commenting further on this matter."

Source; Skysport.com