INA card
The INA card is an international card designed for legal entities that can be used at all INA service stations in Montenegro and other INA and MOL service stations displaying the INA card mark in Bosnia&Herzegovina, Croatia, Slovenia, Hungary, Serbia, Romania, Check Republic, and Slovakia.
The INA card can be used to pay tolls on highways, set up ENC devices standing orders, and benefit from fast passes on highway traffic routes
Find additional info here.