Country by country
The rule that matters on a multi-country trip is the strictest one on the route: you carry a permit for the whole journey or you do not. Here the strictest is Italy (required).
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Greece Recommended
A valid US license is accepted for tourist stays. The US Embassy advises carrying an IDP anyway: rental companies may require one, and it can matter after an accident.
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Italy Required
The US Embassy advises US citizens to carry an IDP; some sources treat an official Italian translation as an alternative. Rental agencies commonly require an IDP regardless.
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Portugal Recommended
US license accepted for short stays. IDP strongly recommended.
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Morocco Recommended
US license accepted. IDP recommended.
| Destination | IDP | What the rule says |
|---|---|---|
| Greece | Recommended | A valid US license is accepted for tourist stays. The US Embassy advises carrying an IDP anyway: rental companies may require one, and it can matter after an accident. |
| Italy | Required | The US Embassy advises US citizens to carry an IDP; some sources treat an official Italian translation as an alternative. Rental agencies commonly require an IDP regardless. |
| Portugal | Recommended | US license accepted for short stays. IDP strongly recommended. |
| Morocco | Recommended | US license accepted. IDP recommended. |
Driving on a licence from somewhere else?
Every answer above assumes a US licence. Open this trip in the checker to switch the issuing country, add or remove destinations, and see the verdicts change.
Other trips
Informational only, not legal advice. Requirements change; confirm with the destination's embassy or your automobile association before you drive.