—>This coupon here, the one promising a free cheeseburger and drink? It's fake. It didn't come from Wendy's, and it certainly isn't a special offer for Allstate customers. If you try to redeem it, you will either leave hungry or short a few dollars.

Snopes adds:

In fact, this same fraudulent coupon has been circulated via e-mail in previous years; someone has merely updated the expiration date and logo and once again sent it winging through inboxes everywhere.

Wendy's Coupon [Snopes]