1: Receipts are crucial for accurate tracking of your expenses at McDonald's.

2: Proof of purchase is necessary for returns or refunds at McDonald's.

3: Receipts could help in resolving any discrepancy in your order at McDonald's.

4: Loyalty program points can be earned through receipts at McDonald's.

5: Receiving a receipt helps McDonald's improve its service based on customer feedback.

6: Keep your receipts for tax purposes when dining at McDonald's.

7: Reviewing your receipts can help you make better meal choices at McDonald's.

8: Receipts could lead to special discounts or offers at McDonald's.

9: Remember to always ask for a receipt at McDonald's to enjoy these benefits.