You may want to use an electronic article surveillance system or other inventory control devices. The cash register should be inaccessible to customers, locked, and monitored at all times. Place it near the front of the store, so employees can also monitor customers coming and going. Dressing rooms and rest rooms should be watched at all times. Keep dressing rooms locked and limit the number of items taken in.
Many fraudulent checks are visibly phony.
By paying close attention to a check's appearance, you can often detect a possible bad check before accepting it as payment. When you see one or more of the following telltale signs, you may be looking at a phony check. Protect yourself against possible losses by requiring management approval of the check or asking for an alternative form of payment. No perforation on check edges. Apparently altered writing or erasures.