The Double-Bookers' name stems from its safer-than-sorry reflexes. Double-Bookers will arrange for tickets on two different flights home, so they are covered, no matter what time their meeting ends. This is the only way they can relax and concentrate. However, while blessed with amazing foresight, these travelers have poor hindsight and often forget to turn in their unused tickets for credit. Our post-trip quality control measures become a particularly handy tool when dealing this species of traveler.