Question:
You sold all chometz but forgot to include a bottle of vodka that was found six months later in a closet.
Can it be used? What is to be done with it?
Answer:
if you sold all of your chometz then the vodka was included in what you sold and you may drink it. However if you only specified that you are selling only specific items, then you should not use it. It is probable that the terminology used was that you are selling all chometz that you have in your property.
