Since I first mentioned getting cash back at supermarkets when using a Discover Card, there have been questions about which supermarkets allow cash back on this credit card. According to discovercard.com, the following stores offer cashover:
Big Y, Hannaford, Safeway, bloom, Heinen's, SAM'S CLUB, Carrs, Meijer, ShopRite, Dominick's, Pak'n Save, Sweetbay, Food Lion, Pavilions, Tom Thumb, Genuardi's, Randalls, Vons, Giant Eagle, and Walmart.
It used to be that the cashback goes on your monthly statement as being a purchase. But Discover changed this so that they now classify the cash back as being a "cashover". They separate out the "cash over" part from the "purchase" part of the transaction. And, you don't earn the regular Discover Card cashback bonus on the cash over amount.
Warning: I do not recommend this strategy for people who run a balance on their credit card because you will end up paying interest charges on the cash over amount.