Selling Chometz with a Rav

Based on the above, most Jews arrange with a rav to sell their chometz a few days before Pesach. They appoint the rav as a shliach or a po’eil (below, 16) by granting him power of attorney to sell their chometz to a non-Jew. Then, on Erev Pesach, the rav himself makes the actual sale with the non-Jew on behalf of everyone who appointed him as a shliach and signed the harsha’ah [power of attorney document].