Which supermarket chains are there no issues regarding Chometz Sheovar Alav HaPesach? And which are problematic?
In the northeast US, the Jewish-owned C & S Wholesale (Cohen & Siegel) is a large distributor of food to many supermarkets. One should buy chametz that was either acquired by the gentile-owned supermarket before pesach or by C&S after pesach. One can also buy from Jewish stores that sell their chametz over Pesach.