Rental contracts & Housing rights

Both your and your landlord’s name and signature.
An agreed monthly rent and method of payment.
Rental security deposit information, if applicable.
An address and description of the place.
Starting and ending dates.
Specific house rules (pets, third party housing, smoking policy etc.).
Extra costs and/or utilities (energy (gas and electricity), water, Internet, phone line etc.).
Landlord’s duties (maintenance, repairs etc.).
A notice period for terminating the contract.
An inventory list (if the apartment is furnished).
The date on which the rent will be increased each year.
Please, note that an oral agreement / contract is legally valid but not widely used (mainly for security reasons). 
Since an oral agreement is more difficult to prove, you should take a witness with you if you want to make an oral agreement.

Fixed-period rental contract
Most rental contracts offered as a fixed-period rental contract are, by law, 
considered indefinite rental contracts with a minimum fixed term. 
This means that you cannot terminate your contract until the minimum fixed term has lapsed. 
Often this minimum fixed term will be six to twelve months. 
Sometimes an escape clause is added in the form of a “diplomats’ clause”: in case you can prove that your employer is relocating you, you may terminate early.

Temporary contracts are allowed for up to two years (independent residences, self-contained) or five years (dependent residences). 
They cannot contain a minimum fixed term. 
This means that the tenant must always be allowed to give notice (no longer than one month). 
These contracts terminate by force of law, although the landlord must remind the tenant of termination at least one month and no longer than three months before the end date. 
In case the landlord forgets to remind the tenant or in case the contract is extended, it becomes an indefinite term contract by force of law.