What is a Mietschuldenfreiheitsbescheinigung?

The Mietschuldenfreiheitsbescheinigung is a letter that you get from your landlord when you move out. It confirms that you have no debt to your landlord. You might need it to apply for an apartment.

Mietschuldenfreiheitsbescheinigung example
A Mietschuldenfreiheitsbescheinigung from a Berlin housing company