Source: BBC SportBBC Scotland has learned the former owner of Rangers is threatening to go to court to prove he still owns the club's assets.
Craig Whyte led the club into administration and liquidation last year before a consortium led by Charles Green took control.
But Whyte claims he was behind the takeover all along, with Green agreeing to be the front man.
Green says Whyte "has no right to any claim on Rangers FC".
BBC Scotland has obtained documents, text messages and secret recordings which may cast doubt on Green's claim that Whyte had nothing to do with the deal to acquire the assets.
On one recording, Green, who led the Sevco 5088 consortium that bought Rangers' assets, is heard saying in reference to Whyte: "You are Sevco, that's what we are saying".