Stewart Donald can charge interest up to nine per cent above base rate on money he loans to the holding company that owns Sunderland.
A previously unreported 'loan agreement' from August 2018 shows that money loaned to Madrox by majority shareholder Donald has an interest charge over it, should he choose to apply it.
However, Donald is refusing to comment on the existence of the document, a move that is sure to leave fans wondering if interest has been applied or if it will be in the future, and who would be liable to pay it.