The Daily Mail says Carroll, who can't seem to avoid controversy off the pitch, is in a dispute with his former agent that is the subject of FA arbitration.
Peter Harrison, who has represented Carroll, 21, since he was 16 and claims to have him under contract until next April, has a complaint lodged with the FA over monies allegedly owed from the player's five-year deal with Newcastle that was signed in the summer.
Harrison is understood to have been told a year earlier that Carroll wanted to join agent Mark Curtis.
His clients include Newcastle captain Kevin Nolan, with whom the bad-boy centre forward has been staying to meet his bail conditions.
It is Curtis who negotiated Carroll's new contract with Newcastle and Harrison is understood to be considering legal action against his rival middle man, based in Gibraltar, once his FA case against Carroll is resolved.