I count on your support.
My partner is working and living in Germany since March 2018 and he recently broke up with me.
We de-registered from the authorities and he believes he is not anymore liable in paying the rental of our appartment in Switzerland, although his name is also on our rental contract.
The rental contract has a notice period of 3 months at quarter-end, that means end of March 2019 for end of June 2019.
Hope somebody could advise on the legal side.