kaucija

1. deposit; security deposit
   Stanodavac traži kauciju u visini jedne kirije. — The landlord wants a deposit equal to one month's rent.
   Kad smo se iselili, vratili su nam kauciju. — When we moved out, they returned our deposit.
2. (in court) bail
   Osumnjičeni je pušten uz kauciju. — The suspect was released on bail.

Common phrases are platiti/dati kauciju and pustiti uz kauciju (release on bail).