Abstract: A computer may receive a product code from a POS device. Further, the computer may compare the product code to identifiers for a plurality of fraudulent coupons comprising universal product codes (UPCs) of the fraudulent coupon and a trigger item code of the fraudulent coupon. Responsive to a match between the product code and the identifier of at least one fraudulent coupon, the computer may obtain information associated with the fraudulent coupon. Further, the computer may transmit the information of the at least one fraudulent coupon to the POS device. The POS device may receive the information of the at least one fraudulent coupon and compare the information with a UPC of a coupon scanned at the POS device. Responsive to a match between the fraudulent coupon information and the UPC of the coupon, the computer may generate an alert to notify that the scanned coupon is a fraudulent coupon.