An agents row has broken out over Mikael Silvestre.
The Manchester-based Kennedy McKeand Agency is threatening to take legal action against Lee Anderson following Silvestre's free transfer move to Werder Bremen this summer.
KMA is claiming that Silvestre signed a five-month representation agreement with the company in April.
It entitled them to a five per cent cut of the Frenchman's wages should he move to a club in the United Kingdom, Germany or Turkey.
When Anderson told Silvestre that he could arrange a move to Bremen, an agreement was struck which would see KMA waive its rights over the defender in exchange for a representation contract with the German club worth £45,000.
That contract never materialised.
Now KMA is demanding the £250,000 that Anderson is believed to have earned from setting up Silvestre's move to the Bundesliga.
The 33-year-old, who spent 11 years in the Premier League after joining United from Inter Milan in 1999, earns £50,000-a-week in Germany.