Several countries with one car
Montenegro → Croatian coast
Cars from Kotor and Budva allowed towards Dubrovnik.
Starting point · you pick up the car here

Montenegro
Kotor / Budva
You rent from a company in Montenegro; the cross-border permit (Green Card) is issued for that company’s car.
Country you can enter #1

Croatia
No cars allowed right now
For information only: RentBalkans only brokers car rental; it does not sell tours, accommodation or transfers. Check entry rules for your passport; the cross-border permit and documents are the rental company’s responsibility.