1. A owes B P100,000, secured by a real estate mortgage. On due date, X without the knowledge and consent of A paid B the whole indebtedness, which B accepted.
2. Is the obligation of A to B extinguished?
3. Can X compel B to assign or transfer to him the right in the mortgage?
4. Can X recover from A? How much?
5. A binds himself to repair the house of B. Before he can perform the obligation, the house was destroyed by an accidental fire. What is the effect? Explain
6. In payment of his obligation, X gave Y a check which the latter accepted. Is the obligation extinguished? Explain.
7. If the creditor had repeatedly refused to accept payment without valid reason, is the obligation considered extinguished?
8. If the debtor dies without paying his indebtedness, is the obligation extinguished? What if the creditor dies before due date of payment, what is the effect?
9. A, 18 years old, borrowed P2,000 from B, 16 years old. On due date, A paid B and the latter lost the money in a gambling game. Is the payment made by A valid? Explain.