Tellhappystar – Take Official Hardee’s® Carl’s Jr. ® Survey Receipt Survey Tellhappystar is an official customer satisfaction survey by Hardee’s® and Carl’s Jr.® restaurants. By visiting and taking part in the survey, customers can share their valuable feedback and experience. Participants get a validation code to redeem for exciting rewards and free food in return for the time spent. The Tellhappystar survey … Read more