POSSESSING THE DISPOSSESSED

An item that is
lost or stolen remains the property of its owner. Were he to retrieve it, he
would not require a kinyan to regain ownership. Nevertheless, it is
outside of his control—aino birshuso. The Gemara (Bava Kama 69b) says
that just as one cannot sell, gift, or be makdish something he doesn’t
own, he is likewise restricted when the item is his but not birshuso,
because his lack of control compromises his ownership.

Does
one violate bal yeira’eh uval yimatzei for chametz that isn’t birshuso,
like a package that has been handed off irretrievably to the postal service? R’
Moshe maintains (Igros Moshe Orach Chaim 1:146) that the sender lacks the full
measure of possession required to violate bal yeira’eh, even if the chametz
remains his until it reaches the buyer. To the Chazon Ish (Orach Chaim 118:4),
ownership per se is sufficient for bal yeira’eh.