It is illegal for a private company (e.g. Walmart etc.) to demand to see a customers receipt at the point of leaving the premises (e.g. Walmart greeter demanding to see customer receipt as they leave the store) however the private corporation does have the legal authority to detain a customer due to “shopkeeper’s/merchant’s privilege” as long as reasonable suspicion has been met (e.g. customer refusing to show a receipt while leaving with product in hand etc.). Reasonable suspicion deems that the retailer must have a reasonable belief, based upon specific facts, evidence, and circumstances, that the customer has committed theft. For this reason, randomly selecting customers (e.g. customer with no product in hand leaving the store etc.) to show a receipt without any suspicion is problematic. Membership retail establishments (e.g. Costco or Sam’s Club etc.) can demand to see proof of membership as well as proof of receipt because when members sign up they agree to specific terms and conditions. Refusal to comply with store policy may result in consequences, up to and including being denied future entry and/or membership termination