Whether Sixt (or any rental agency in France) requires an International Driving Permit (IDP) depends largely on the language and origin of your domestic license. For U.S. citizens, French law technically requires a "certified translation" of your license if you stay longer than 90 days, but for short-term tourists, your valid U.S. license is often accepted. However, Sixt’s official policy in 2026 states that any license not printed in the Roman Alphabet (such as Arabic, Chinese, or Cyrillic) must be accompanied by an IDP. Even for English speakers, Sixt highly recommends an IDP to avoid any potential disputes with local police or during the insurance claim process. Many Sixt locations in France will let you rent with just a U.S. license and passport, but if you are involved in a traffic stop or an accident, the French Gendarmerie may demand an IDP. Since it only costs about $20 from AAA, it is considered an essential "insurance" document for driving in France to ensure you are compliant with both the rental company's terms and local law enforcement expectations.