The Football Association has contacted its Italian counterpart after receiving a complaint from Portsmouth over Kevin-Prince Boateng’s transfer to Genoa.
A £5m fee was agreed with Genoa for the midfielder, who was subsequently loaned out to Milan, but Pompey claim they have received no payment.
“We’ve made representation to the Italian FA,” the FA told BBC Sport.
Pompey administrator Andrew Andronikou said Genoa had missed the transfer’s first instalment two weeks ago.
“We’ve been listening to excuses. We’ve had enough,” said Andronikou, adding that Pompey, who have amassed debts of over £120m, were due the second of their four instalments in about a week.
“We complained last week on the 15th and got a response saying ‘sorry, we mistook your bank details. A week later, it doesn’t look like the cheque has even hit the post.”
Boateng joined Portsmouth from Tottenham in 2009, scoring five goals in 27 appearances for the club.
