Some shoppers at UK grocery-store chain Sainsbury's say they've got huge discounts using its app.
They appear to have repeatedly scanned a coupon at its self-service checkouts, taking large discounts off their shop.
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AdvertisementA UK grocery chain says it has been dealing with an increase in "fraudulent coupons" after social media users bragged of getting huge discounts on their shopping by repeatedly scanning the same coupon.
Persons:
they've, Sainsbury's, —
Organizations:
Service, Business