Why should Mrs Jones accept cheques the accuracy of which would almost certainly be "doubtful" at best? Why would she shake hands with the devil that has caused her and her family so much distress over so many years? Assuming that she has the cheques still in her possession and has not returned them, she would be best advised to go for a full audit of CM(and its associated companies) books. This would be on the understanding that no respectable and above board record company would refuse such a request. After all audit rights are normally present in record contracts and now there are plenty of examples in case law where artists without such a clause in their contract have been awarded them retrospectively. Just remember that false accounting is a criminal matter. Go for it.