I was looking on halachapedia and different sources, but I couldn't find an answer to a particular questioN:
If a Jew is staying at someone elses house (whether a Jew or a gentile, but lets say its a Jew who doesn't necessarily keep the laws of Passover), then whats the deal with Bedikas Chametz?
If that person has a private bedroom within the house, is Bedikah required just there? What if they share a living room and kitchen, if the other person is Jewish do they both have to do bedikah and make sure that there's no chametz in the house? Is the fact that its an apartment in a complex that is owned by gentiles significant?
In order words:
Whats required in Bedikas Chametz if someone is staying at anothers house (let's say he's Jewish but doesn't necessarily keep the laws of Pesach) ?