Okay, but in that reality you're morally perfectly fine by just not telling your landlord. Landlords cannot legally visit you in the apartment unless they give you proper notice in advance and they must not keep any keys while the apartment is rented.

Just saying.

That is the nice thing about German contract law. If you as a private person (v.s. a head of a business) sign a contract, you are widely protected from unfair contract terms. This applies to any contract but especially employment or rent contracts.

You sue the landlord immediately after signing the contract and get thousands of euros in a few years... Just be a member of Mieterverein, pay them that 70€ a year and you pay nothing else for the lawyer.

I know a few people who took way too expensive rental contract, sued and got the money back in court. It is annoying that you need to do this, but there is a way and it only costs your time.

> Legal? Maybe not - but here in reality you have little recourse.

The recourse would be to simply not move out. Even if it's in the contract, illegal parts of the contract are void.

Then you go to a Mieterschutzverein and put them in their place.

> If you need a space, you sign whatever they give you.

Exactly. And then you ignore the bullshit.