In general, a refund-fraud scam goes like this: You purchase an item—a CD player, let's say—and leave the store with it. Then you come back to the store and pick up exactly the same CD player; you take the CD player and receipt from the original purchase to the returns desk, claiming that this is the item you bought, and get a refund for it. You keep the original CD player, and pay nothing. Professional shoplifters like refund fraud because it's relatively safe. Since you never actually steal an object from the store, no one can chase you out to the parking lot.