Beyond checkpoints and rental counters.
Because an IDP presents license details in multiple languages, it can help in situations beyond formal checkpoints too — explaining your credentials to a parking attendant, a local mechanic, or anyone else who needs to understand your license quickly. This kind of everyday friction reduction is easy to underestimate until you're actually abroad.
It's a small document that solves a surprisingly common practical problem for travelers navigating a country where they don't speak the language.