I used a Coinstar machine within a local grocery store to redeem $175 worth of coins to a Amazon.com eCertificate. The gift code that was printed on the receipt did not work on Amazon.com. After numerous phone calls to both Coinstar and Amazon.com customer service help lines, it was determined that the gift card code was printed correctly and valid, but expired due from long disuse in the machine. Unfortunately, neither company will claim responsibility for this problem. Although, in my opinion, my change is still in the Coinstar... read full review »