The Torah requires us to return lost property to its owner. It follows that if the lost property has no owner, there is no duty to return it and the finder may keep it.
That would be cheating the rightful party and an injustice. Some authorities write that doing so would be considered a taus b'dvar mishna, a mistrial, and the compromise is null and void.
The Difficult Choice ‘His Father’s Lost Object And His Rebbe’s Lost Object…’ (Bava Metzia 33a)
What happens if two people are holding on to abandoned property and each claims to have found it first?
The Majority Rule ‘If The Majority Are Israelites…’ (Bava Metzia 24a-b)
The point of the dispute is whether we follow the Torah's terminology, that Shemini Atzeres is independent, or people's common parlance, that Shemini Atzeres is included in Sukkos.
The Physician’s Dilemma ‘It Came Into His Hand While Forbidden’ (Bava Metzia 21b)
Preparing for Yom Kippur, Erev Yom Kippur, Halachot of the Fast, Those who are exempt from fasting, Yom Kippur, End of the Fast
Mr. Krumbein firmly accepted upon himself to return to those he knew he had cheated and also to donate to the local shul and community center.
‘Stop, Thief!’ ‘Are Identifying Marks Biblical Or Rabbinic?’ (Bava Metzia 18b)
The Bergs spent Rosh Hashanah in the apartment and then went on to their relatives.
The ‘False’ Rumor ‘If One Found Notes of Acquisition’ (Bava Metzia 14a)
Looking from mother to father I would wonder: Is Rosh Hashanah a happy day or a sad day?
From this decree on, the two days of Rosh Hashanah – unlike the two days of Pesach, Shavuot, and Sukkot – were no longer celebrated out of doubt but out of certainty.
His Silence Is Deafening ‘One Seized It In Our Presence’ (Bava Metzia 6a)
Tosfos writes [Gittin 47a; Pesachim 57a] that hefker (disowning) rooted in error is not hefker, just as a gift or transaction rooted in error is not valid [C.M. 246:1-3].
The Burdensome Beast ‘He Put His Donkey On The Ferryboat’ (Bava Kamma 117b)
When he reached the bank, he put his hand in his pocket and realized the money was gone.
The Messenger Or The Message? ‘How Do We View This Agent?’ (Bava Kamma 104a)
Asher had Yankel summoned to Rabbi Dayan's beis din. He presented his claim; Yankel denied it.