The bank details of jockey Fergal Lynch were found at the home of professional gambler Miles Rodgers, the Old Bailey race-fixing trial has heard.
Professional gambler Mr Rodgers was the subject of a police raid
They were in a briefcase in Mr Rodgers' hallway at White Gates, in Sheffield, when he was arrested in September 2004, according to uncontested evidence.
Mobile phones were also seized in the raid, City of London Police said.
Six defendants, including jockey Kieren Fallon and Mr Rodgers, deny conspiracy to defraud betting exchange customers.
The alleged conspiracy involved defrauding users of Betfair, a betting exchange.
The court heard that police officers also searched Mr Rodgers' Italian restaurant, Tiamo, in Sheffield and found paper in a shredder.
Some of it was re-constituted by Sgt Richard Peacock who colour coded strips and photocopied them.
Fergal Lynch's bank details were found at Mr Rodgers' home
He said one of the pages had the initials KF and £2,500 on it.
Earlier, Andrew Balding, the trainer of Ballinger Ridge, agreed to a defence suggestion that top jockey Kieren Fallon - who is also on trial - made a "howling blunder" on the horse and had been "mortified".
Mr Fallon had a commanding lead but eased up and lost the Lingfield race to another horse, Rye.
Mr Balding said the jockey had later been worried that the mandatory 21-day ban for "dropping his hands" would mean him missing the Dubai world cup, which is one of the world's richest races.
Missing the event meant the jockey had to suffer "a huge penalty" for his failure, said Mr Balding of Newbury.
Mr Fallon, 42, formerly of Newmarket, Cambridgeshire, but now of Tipperary, in the Irish Republic, Fergal Lynch, 29, of Boroughbridge, North Yorkshire, and Darren Williams, 29, of Leyburn, North Yorkshire, deny being involved in a conspiracy between December 2002 and August 2004.
Shaun Lynch, 38, of Belfast, Miles Rodgers, 38, of Silkstone, South Yorkshire, and Philip Sherkle, 42, of Tamworth, Staffordshire, also plead not guilty.
Mr Rodgers also denies concealing the proceeds of crime.