Some supermarkets still can't figure out how to solve the problem of counterfeit free-product coupons. ["Retailers Should Accept Cents-Off Internet Coupons," SN editorial, Nov. 3, 2003, Page 8]. As a result, they continue to refuse perfectly legitimate cents-off coupons downloaded from manufacturer Internet sites. I have a solution. Supermarkets should post signs like this: "If you have a manufacturer's free-product coupon to redeem, you must write your name and driver's license number on the back of the coupon before it is your turn to check out. And, please have your license ready to show the cashier. Thank you."