Carls Jr Coupon Or Hardees Coupon: B1G1 FREE By Becentsable Carls Jr Coupon or Hardees Coupon: Today only (1/20), buy one Thickburger and get one free with this Carls Jr Coupon or Hardees Coupon. Make sure to also check back on 1/27 for another buy one, get one FREE coupon!