The rule itself: Gittin 11b; Kiddushin 23a [2x]; Bava Metzia 12a
Not requiring the beneficiary's awareness: Ketuvot 7b; Nedarim 36b
Claiming property for a Fetus: Ketuvot 7b Claiming a "Found Object" for another individual; this benefits one person, and may harm another: Bava Metzia 10a
Witnesses on a bill claim the benefit for the beneficiary: Bava Metzia 13a, 19a, 20a, 35b
Claiming a debtor's property for the creditor: Gittin 11b
Claiming a debtor's property for a creditor, if it will hurt another creditor of that debtor: Gittin 11b-12a, Bava Metzia 10a Receiving a Bill of Divorce is not considered to be beneficial to the wife: Gittin 11b, Bava Metzia 12a
Acquiring meat at a time when people normally want meat is considered a benefit: Eruvin 81b
Making an acquisition, which then requires one to spend money, is not considered a benefit: Eruvin 81b Receiving a gift is considered a benefit: Bava Metzia 12a Conversion as a Benefit for a minor: Ketuvot 11a Freedom as a Benefit for an Eved: Gittin 11b, 12b-13a; Kiddushin 23a [2x]; Bava Metzia 19a
Conversion as a Benefit where the Parent Converts as Well: Ketuvot 11a
Conversion as a Benefit for an Eved: Ketuvot 11a
Conversion as a Benefit for a mature non-Jew: Ketuvot 11a Freedom as a benefit for an Eved: Gittin 11b, 12b-13a; Bava Metzia 19a Extending the limit for travel outside a town on Shabbat [Techum], on another's behalf: Eruvin 46b, 80b, 81a-b, 95a Merging properties to permit transportation between them on Shabbat, on another's behalf: Eruvin 46b, 80b, 81a-b, 95a
May a nochri acquire a benefit for a Jew: Bava Metzia 71b-72a