Your McDonald’s receipt can carry more than the details of what you ordered. By using the visit information to access the feedback survey, you can rate the parts of your experience that mattered most, including food, service, order handling, and cleanliness. The referenced site describes a voucher as part of the process after the questionnaire is completed, with free items such as a cola, coffee, small fries, or McSundae mentioned as potential rewards. Check the specific offer details before redeeming any voucher.deinfeedback