“Free” can include a required purchase
Historical invitations have mentioned a sandwich after purchasing specified items such as fries and a drink. Read the full sentence on your own receipt; the product name alone does not explain the entire condition.
The reward can differ
A restaurant, country or campaign may offer another sandwich, a discount, sweepstakes entry or no identical reward. The completion screen and receipt are the only useful sources for that transaction.
What to bring when redeeming
Keep the original receipt with the written validation code. Check the deadline, restaurant restriction, required purchase and whether the offer is valid at the counter, kiosk, drive-thru or another channel.
