5. Fill out the survey on the receipt

Most of us, after we receive a receipt, habitually throw it away. But if you want to get free food at McDonald’s, wait a second and save that receipt.

Now, look at it carefully until you find a link. Access it from your mobile phone or PC, and it will take you to a short customer satisfaction survey. The link should be at the bottom of the receipt.

Fill out the survey, and the next time you visit the restaurant, you will be able to take your reward. These rewards may vary, but usually, you will get some free fries or a Buy 1 Get 1 Quarter Pounder with Cheese offer.

And the best part about this trick is that you can use it with every single order that has a survey on the receipt. There are no restrictions on how many coupons may be redeemed because each one has a distinctive 26-digit number that must be entered while completing the survey.