There are NO $20 DVD Coupons in existence. Nor are there any Coupons (high value & rarely of any value) for Gift Cards, Flash Drives, Anything really Electronics.
Most Coupons are issued for Food, HBA, and Kitchen stuff. Rarely will you ever encounter a fake Target web coupon, but Guests will sometimes try to throw them in without purchasing any of the items.
I know Disney & Fox will sometimes offer $3-$5 coupons for new release titles, but never for 70% or more Value..
The Energizer Coupon was legitimate, if it was printed on shiny flimsy paper, with a hologram. Those are issued if a guest calls the company and complains about there batteries. If it was a Internet Coupon, or a Regular coupon without hologram, it was not legitimate.
Almost any Free item Coupon, will have a Holagram. If something seems Fishy, always call over your GSTL/GSA, and make sure AP knows the situation.
You'd be surprised the things "Guests" try to get away with. Free Xbox Games, iPods, even a PS3.. Nah, we don't accept those. Your welcome to try Walmart down the street though.