Stewart Downing's former agent has been arrested following a complaint made by Middlesbrough's England winger.
Downing initially informed Boro about concerns over the way his 'company's affairs' were being handled since when the Football Association has liaised with Cleveland Police and the club.
A Boro spokesman said: "The club advised Stewart to involve lawyers and accountants to investigate these concerns.
"Having established his position, Stewart made a formal complaint to Cleveland Police, who have since been investigating matters.
"This led to the arrest today of a man and a woman relating to the investigation.
"The Football Association are aware of the position and are continuing to monitor its progress."
Meanwhile, a Cleveland Police spokeswoman told the Evening Gazette: "Cleveland Police can confirm that officers from their economic crime unit have today arrested a 50-year-old man and a 43-year-old woman from the Newcastle-upon-Tyne area on suspicion of offences of conspiracy to defraud and money laundering.
"They are currently being questioned by police at a police station in the Northumbria area."