text: Do the easiest thing which is to let them sue in court for the amounts owed.\n   The creditors are filling in the cheques with larger amounts so that they can sue for larger amounts, hoping that the cheques will be proof that the amount is owed.\n    The burden of proof is on the creditors. If someone goes to court he must prove that your son actually owes the money that he's being sued for. While a cheque can be viewed as a form of proof, the fact is that the number amount filled in the cheque isn't in your son's handwriting and therefore the cheque loses it's value as proof.\n    The original loan agreement will have to be provided to the court, and that will have the correct amounts on it.