Hi, we recently moved home and hiredd an agency for it. Hving noticed that they didn't return some of our items, we issued a stop payment on the cheque we gave them, AFTER informing them of our intent to repay them once the items were returned. They accepted the offer, and after a week, having lost our items they claim that we illegally stopped payment and threaten to file a case. Do they have a valid case? If we take this to the courts, what are the costs like?