West Ham, West Brom and Crystal Palace have also been connected with the 29- 12 months - old but Villa supervisor Paul Lambert has moved to the head of the queue to sign the Englishman.
Richardson has a 12 months left on his present Craven Cottage deal but is desperate to keep in the Leading League subsequent the club's relegation to the Championship final time.
Even with finishing next base, the 2013/ 14 season proved his most successful in a Whites shirt as he scored four aims in 31 league appearances.
Richardson was spotted as a youngster by West Ham but moved to Manchester United in 2002 devoid of participating in a initial - staff sport at Upton Park.
He invested 5 many years at Previous Trafford in advance of signing up for Roy Keane's Sunderland in a five.5m deal. In August 2012 he returned to London to be part of Fulham for an undisclosed fee.
Richardson, who famously helped West Brom stay away from relegation in 2005 - scoring three aims in twelve appearances whilst on financial loan at the Hawthorns - has been capped eight occasions by England.