I've been meaning to post about this, But I'm honestly surprised AP is not being notified about it either. Anyway some very creative "guests" have discovered that the pharmacy gift card coupons will scan at any register without verification. This has been a problem, as some have decided it's okay to copy this bar code and redistribute it...
Now, I've been asked myself why Spot doesn't just blacklist the bar code, well Target doesn't have the time to create unique bar codes so they make one master and print off coupons with that. So if someone discovers a flaw with a coupon, they can continue using it until the actual coupon expires
To sum it up, if someone comes through your lane with a mobile coupon for a gift card, politely tell them it's fraudulent and notify AP.