Policy compliance remains one of the biggest challenges for corporate travel buyers. There are lots of old and new reasons, from the practical to the psychological. Most notable is the complexity of business travel. Throw in various other factors and the notion of leakage is becoming ambiguous.

If your company neither endorses nor prohibits Uber, is using the service noncompliant behavior? What about when you book outside the corporate program but send back itinerary information? Depending on an organization's goals and culture . . .

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