“Used” gift cards in the store: A lot of stores make it easy for you to buy gift cards. They have giant racks containing dozens of cards in their center aisle or near the registers. Unfortunately, they are also making it easy for thieves to steal from you. Most cards today have a scratch-off area on the back that contains a PIN or other number needed to redeem the card. Thieves scratch it off, write down the number and then call the toll-free number regularly while waiting for the card to be purchased and activated. Once it is, they drain the card’s balance. Protect yourself by double-checking the back of the card for any signs of tampering before buying.
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http://www.moneytalksnews.com/want-to-save-money-every-time-you-shop-pay-with-a-discounted-gift-card/