Where two people gave a Guardian objects to watch, and both claim the larger object: Bava Metzia 3a
Where a worker was told to collect his salary from a merchant, and now both merchant and worker come to the Employer demanding payment/reimbursal: Bava Metzia 3a, 6a
Where both a merchant and a consumer claim an item is entirely theirs: Bava Metzia 2a, 8a
If, between a merchant and a consumer, one says it is entirely his and one claims half: Bava Metzia 8a
If one of them grabbed it, and tried to Designate it for Holy Use: Bava Metzia 6a
If one of them tried to Designate it for Holy Use without grabbing it: Bava Metzia 6a-7a
If two people are holding an object: Bava Metzia 7a
If two are holding a Bill, one claims it is his and the other agrees but insists that he paid up the debt recorded therein: Bava Metzia 7a
Above, if the Bill has the Court's stamp Ordering Payment: Bava Metzia 7a
If one holds the section of the Bill with the facts salient to this particular case, and the other holds the generic section: Bava Metzia 7b
Using an Oath[, as a Rabbinic Institution to prevent people from stealing others' items and claiming them]: Bava Metzia 3a, 5b, 7a
Whether we use an Oath or not: Bava Metzia 2b-3a, 6a
Whether we use an Oath in a case where both say "Maybe it's mine" or both are certain: Bava Metzia 2b
Whether we use an Oath where one of the sides has nothing to lose with his claim: Bava Metzia 2b-3a
A Lone Witness can mandate an Oath: Bava Metzia 3b