Techniques for confirming purchases of products from a retail establishment using a mobile device allow for loss prevention personnel at a retail establishment to confirm that users exiting the retail establishment in possession of physical products have legitimately purchased those products via their mobile devices while within the retail establishment. When a purchase facilitating server, in communication with a user's mobile device, transacts the user's purchase of one or more products within the retail establishment, the purchase facilitating server may generate a purchase confirmation as a receipt of the transaction. The receipt may include a purchase confirmation code and/or one or more visual indicators of an estimated likelihood of theft associated with the corresponding transaction. The receipt may be transmitted to a loss prevention device at the retail establishment, for use by loss prevention personnel in matching against the user's physical cart before the user exits the retail establishment.