do you sell chametz that you dont know about? im not sure but i believe you only sell that chametz of which you are aware. we rely purely on bitul for the chametz we dont know about (again, i think)
Good question. I’ve e-mailed my rav. However, I do know he holds that when you sell your chametz you put down just your address and not the physical location (3rd cabinet from the right, top shelf of the pantry, etc.) in case you forget where you put something, in which case it wouldn’t be included in the sale. At least I think that’s what he said once before. I guess I’ll e-mail him again. 🙂