The Department of Homeland Security (DHS) is warning holiday shoppers of a simple, yet effective, holiday scam involving gift cards. Thieves have been copying the numbers and codes from the back of the gift cards while they’re still in the store, then waiting until they’re purchased and activated before using the information to make a purchase. Because the cards are usually processed as gifts, the theft isn’t discovered until the recipient tries to use it. To prevent gift card theft, DHS officials recommend checking to make sure the protective scratch-off area on the back of the card hasn’t been tampered with before buying it. They also suggest buying gift cards that are kept behind store counters, whenever possible.