Does National require an IDP in Guinea-Bissau?

The minimum age to rent is typically 21 (18 in Michigan and New York, as required by state law); renters aged 21-24 pay a "Youthful Surcharge" of approximately $25 per day (varies by location, lower in some states such as $5/day in New York) and may be restricted to certain car classes.

A major credit card (Visa, MasterCard, Amex) in the primary renter's name with sufficient available credit is required; National generally does not accept debit cards, and renters without a ticketed return travel itinerary must provide a hold/deposit typically between $300 and $400 depending on location and vehicle class.

The renter's spouse or domestic partner who meets the same age and licence requirements drives free; other additional authorized drivers cost about $15 per day (typically $5/day in New York), and must be at least 21 with a valid licence. National requires a valid, unexpired full driver's licence held by the renter; for under-25 drivers some locations require the licence to have been held for at least one year, though National does not publish a uniform minimum tenure across all locations.

Vehicles rented in the U.S. or Canada are prohibited from being driven into Mexico; U.S.-Canada cross-border travel is generally permitted but one-way US/Canada drop-offs are limited to participating locations, and rentals originating in certain Mexican cities (e.g. Tijuana, Mexicali, Hermosillo, Monterrey, Saltillo) may cross into the U.S. after purchasing an extension of liability protection (about $10 USD/day).

National states that an International Driving Permit (IDP) is commonly requested in select countries and is generally recommended when travelling abroad; specifically, overseas travelers whose licence uses a non-Roman alphabet may need to present an IDP alongside their home-country licence.

There is no functioning national motorway toll or vignette system; roads are funded publicly and you generally pay nothing to drive, though informal road barriers and checkpoints are common in the interior.

Parking in Bissau is largely informal and unmetered, with self-appointed attendants ('guardadores') expecting a small CFA-franc tip to watch the car; there are no painted paid-zone schemes or parking apps.

Enforcement is mostly by physical police/gendarme checkpoints rather than cameras; fines are usually negotiated and paid in cash on the spot, and the documented drink-drive limit is 0.15% BAC (15 mg/100 ml).

There is no reliable nationwide emergency line; in a serious crash do not move the vehicles if there are injuries, summon the Polícia de Ordem Pública locally and obtain a written police report (auto), which insurers and rental firms require.