- X, by virtue of having been sent for by B and C, attended as physician and rendered professional services to a daughter-in-law of B and C during a difficult and laborious childbirth. Who is bound to pay the bill: B and C, the parents-in-law of the patient, or the husband of the latter? Explain. <br>
- X, a tax-exempt cooperative store, paid taxes to the City of Manila, believing that it was liable. May X recover the payment? Explain. <br>
- By virtue of an agreement between X and Y, X assisted Y in improving a large tract of land which was later declared by the court as belonging to C. Has X the right to be reimbursed by Z for X’s services and expenses on the ground that the improvements are being used and enjoyed by Z? Explain.