Receipt checks at stores are becoming increasingly common, but they are facing heavy pushback from shoppers. Customers argue that they have already paid for their items and should not be subjected to further inspections. However, many stores have the legal right to ask for receipts as part of their anti-theft policies. Legal experts say that while stores generally have the right to detain customers for reasonable suspicion of theft, refusing to produce a receipt is not a sufficient reason in itself. As of now, there is little concrete law on the legality of receipt checks, but as altercations increase, more court cases may provide clearer definitions and boundaries.