Amazon Offering Shipping Refunds, Gift Cards After UPS Misses Christmas Deliveries

Worst Christmas ever, says one UPS driver

| Inc., the largest online retailer, offered $20 gift cards and refunds on shipping charges after United Parcel Service Inc. said overwhelming volume left it unable to deliver some packages by Christmas. 

Amazon cited failures in UPS's transportation network in messages to customers, saying its own fulfillment centers processed customers' orders in time for holiday delivery.