Our group of 8 rented two cars in Venice. When booking, we selected the option to allow cross-border travel to Slovenia, Croatia, Montenegro, and Bosnia & Herzegovina. The customer service of the rental platform had informed us that this rental company permits cross-border travel and even sent us an email reminder about the policy. At the time of pickup, we clearly informed the staff about the countries we planned to visit and inquired about any cross-border fees. The staff did not charge any additional fees and handed over the cars to us. However, when we tried to enter Bosnia & Herzegovina from Montenegro, we were denied entry due to missing vehicle documentation from the rental company. We attempted entry at two different border checkpoints, both with the same result, which seriously disrupted our itinerary. Abandoning our Bosnia & Herzegovina trip would have cost us three nights of hotel bookings as well as incurred additional expenses for three more nights in Croatia. We had no choice but to spend an entire day driving back to Dubrovnik, Croatia, and rent two new cars for €400 to re-enter Bosnia & Herzegovina. Our originally planned circular road trip was interrupted, and we drove over 10 extra hours. After contacting the platform to request assistance, we received no response from the rental company. We are extremely disappointed with their service. If you're planning to travel to non-EU countries, avoid this rental company at all costs!