Cross-border car rental from Pula works when the rental contract names every destination country, the supplier issues written permission before pickup, and the driver carries the correct insurance documents. For non-EU destinations such as Bosnia & Herzegovina and Montenegro, the rental desk usually also provides a Green Card / “zelena karta,” while EU trips to Slovenia or Italy often need only contract endorsement and a cross-border fee. A Green Card is required for many non-EU destinations from a Croatian rental, while Slovenia and Italy usually do not require one for a standard Pula contract. The Croatian insurance system is coordinated through Hrvatski ured za osiguranje, and official guidance is available through HAK Pula (Hrvatski Autoklub), huo.hr, and mup.gov.hr. When in doubt, ask the desk whether the policy has zero excess, full coverage, or only a standard CDW with a deductible. Ask for the contract addendum and the Green Card before leaving the Pula Airport (PUY) arrival hall or the city desk, because last-minute changes at the terminal main hall can delay pickup by 10–20 minutes. Cross-border permission must be arranged before the car leaves Pula, and the rental company must print the destination list on the contract. SIXT, Enterprise, Alamo, Europcar, AVIA Rent, Last Minute Rent a Car, Nova Rent a Car, Hertz, Dollar, National, Goldcar, Carwiz, Active, AddCar, Autowill, Surprice, Right Cars, Prestigio, and Flizzr each set their own cross-border rules, so the booking note should name Slovenia, Italy, Bosnia & Herzegovina, or Montenegro explicitly. At Pula Airport, some suppliers release cars from the terminal main hall with no-shuttle pickup, while city branches may send the customer to the Karolina lot or Dobrićeva garage. At Booking: Use the notes field to list every destination country, for example “Slovenia and Bosnia & Herzegovina,” because the reservation agent needs that text for pre-authorisation. At the Counter: Ask the agent to show the contract line that authorises each country, and confirm whether the policy includes CDW, SCDW, or FDW with an excess or zero excess. Check the Papers: For Bosnia & Herzegovina or Montenegro, confirm that the Green Card / “zelena karta” is inside the car document folder with registration papers. Decline If Missing: Refuse the vehicle if the contract omits the country list, because a later dispute can turn full coverage into a bill for the franchise and damage costs. Croatian licence holders aged 24 or younger are subject to the mlad(i) vozač rule and a 10 km/h lower speed limit on some roads, but that rule does not apply to a foreign tourist simply because the tourist is young. The cross-border fee in Croatia is usually a one-time charge, not a daily rental rate, and the amount depends on destination risk and insurance handling. A standard Pula rental such as a Fiat 500 or Renault Clio may have a €0–€15 EU fee, while a Renault Megane, Renault Captur, or Kia Stonic going to Bosnia & Herzegovina or Montenegro often attracts a higher fee because the supplier must extend coverage and paperwork. Some companies quote fees separately from the rental rate, while others bundle them into a cross-border add-on. A desk quote of €0 does not always mean free cross-border travel; some contracts include the fee only after a pre-authorisation hold on the card, so check the rental voucher before pickup. A Croatia rental to Slovenia or Italy is usually the simplest cross-border option from Pula, but the driver still needs the correct, toll, and safety documents. From Pula, most routes connect via the Istrian peninsula to the A8 motorway and A9 motorway, which are operated by Bina Istra, while official road and toll information is published by bina-istra.com, hac.hr, and crolibertas.hr. For border-trip planning, visitors often compare Ljubljana, Trieste, Postojna Cave, and the Adriatic coast before choosing the route. Slovenian e-Vignette: Slovenia requires a digital vignette before highway use, and dars.si sells short-term passes with fines for non-compliance. Italian Autostrada: Italy uses toll booths, and the driver can usually pay by card or cash at the barrier. Mandatory Equipment: A reflective vest must stay in the cabin, not the trunk, and the rental company should confirm this in writing. Child Seats: Children under 150 cm or 12 years must use an approved child restraint.