Modern food science has given us foods that stay fresh for weeks and even months. Even so, we generally do not face issues of chametz left over Pesach since we sell our chametz to a non-Jew.1 However, the issue of chametz left over Pesach does arise with Jewish-owned supermarkets who do not sell their chametz, as well as Jewish food distributors who supply supermarkets. In this issue, we will discuss the issues and possible solutions in this regard, as well as to which foods this issue applies.