In Poland municipality provides a place in ground, but for at most 20 years. After that the place is recycled for another burial. You're free to buy it though to prolong that term and in my opinion it's quite common among the elder ones.
> In Poland municipality provides a place in ground
That would apply to municipal graveyard while church owned ones are managed separately. In either case, if grave spot fee isn't paid on time, space goes back to the pool while remains of previous "occupant" are transferred to the ossuarium - IIRC.
