Why an IDP Is Worth Having Even Where It's Not Strictly Required

Even in destinations where an IDP isn't strictly mandatory, having one removes any ambiguity at a rental counter or checkpoint, since staff and officers don't need to make a judgment call about whether your home license alone is sufficient. It's a small, low-cost way to reduce friction on the road.

Given how quickly requirements can shift or vary by specific rental company policy rather than just national law, having the document on hand is simpler than researching every possible edge case in advance.