Nha Trang police just announced a crack-down on tourist drivers there. As in Saigon, drivers are required to have:
1. Vietnamese driving licence
2. motor vehicle registration
3. motor vehicle insurance
4. passport or valid ID card
Drivers without these items may have their motorbikes confiscated.
The word on the street in Mui Ne is that local moto drivers (those that are friendly with the police) have come to an arrangement with police. They can retrieve their confiscated, rented motorbikes after 24hrs for an under-the-table fee of 200,000VND. Everyone else must wait 37 days and pay 500,000VND.