6. Can a contract be terminated? If so, how does the whole thing work?

Yes, in most cases it is possible.

For a standard rental contract, you are required to submit a notice of termination in writing at least one or two months in advance (the exact notification period is predetermined in the contract) or to pay the rent for that period (if you could not give notification at the required time).

In the case of fixed-term lease contracts where your company is renting the apartment for you, things can become quite difficult. If there is no special provision or clause in the contract which enables cancellation, sometimes it may simply be impossible.

In the case of fixed-term lease contracts where you yourself are the lessee, you must have a very good and verifiable reason for termination (such as a serious medical emergency).