In the past twenty-four hours alone, I encountered two cases of hashavas aveidah, returning lost objects. The first was a neighbor who forgot his keys in his front door upon leaving home. Since I was rushing to a meeting, I could have assumed or rationalized that he had briefly returned home and left the keys in the door while he made a quick re-entry before leaving again. As it turned out, I knocked on the door without a response, and then phoned my neighbor to discover that he had indeed forgotten the keys and was very thankful that he had averted a great potential loss. We’ll get to the second case in a moment.

Hashavas aveidah is a mitzvah all of us come upon throughout our lives, either as the “finder” or the “loser.” The basis for hashavas aveidah is Torah law given to the Jewish people at Mount Sinai over 3,000 years ago in this week’s parsha, Ki Seitzei:

If you see your brother’s ox or sheep going astray, you must not ignore them. You must return them to your brother. If your brother is not near you, or if you do not know who [the owner is], you must bring [the animal] home and keep it until your brother identifies it, whereupon you must return it to him. You must do the same to a donkey, an article of clothing, or anything else that your brother loses and you find. You shall not ignore it. (Devarim 22: 1-3)

These laws are unique; they differ from other legal systems since Judaism places a personal duty on anyone who is able, to rescue the lost property of others – a responsibility that does not exist in common law. Only Torah law requires the “finder” to initiate the process of retrieving the article. The demonstrated concern for another’s lost property defines the ethical tone of the mitzvah and shapes much of its practice. The source above reflects two separate mitzvahs: 1) to return lost objects, and 2) not to avoid returning lost objects.

The second case I encountered was actually presented to me as a shaiyla. A couple went grocery shopping at a branch of a major chain. Upon returning home, to their surprise, their debit card was not charged and their purchase was in fact charged to another customer! Do they have to inform the store? The Aruch Hashulchan, Choshen Mishpat 259:17 poskins,

“Hashavas aveidah also means trying to prevent all types of loss that may occur to another. If it is within one’s ability to prevent a loss, he is obligated to prevent it…”

The NLE Thinking Gemara Shiur on Hashavas Aveidah presents a series of contemporary cases and dilemmas addressed by a guided presentation of the sugiya by Gemaras, Rishonim and Achronim using English – Hebrew (menukad) sources.

Click here for the NLE Thinking Gemara Shiur on Hashavas Aveidah, Found: $18,000 Rolex at Times Square; Can I Keep It?


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