In order that payment may extinguish the obligation, it is necessary that it be made at a proper time and place, in a proper manner, and by and to a proper person
A debt shall not be understood to have been paid unless the thing or service in which the obligation consists has been completely delivered or rendered
The duty of a party to present evidence of the facts in issue necessary to prove the truth of his claim or defense by the amount of evidence required by law
When the existence of a debt is admitted by the debtor or established by the evidence of the creditor, the burden of proving extinguishment by payment dissolves upon the debtor who claims payment
S obliged himself to sell 1,000 bags of cement to B for a certain price. However, despite diligent efforts on his part, S was able to deliver only 950 bags because of the cement shortage
The person who pays for the debtor is put into the shoes of the creditor. The payer acquires not only the right to be reimbursed for what he has paid but also all other rights which the creditor could have exercised pertaining to the credit either against the debtor or against third persons, be they guarantors or possessors of mortgages
The third person entitled by reason of payment has merely the bare right to be refunded to the extent provided in the second paragraph of Article 1236 without the right to the guarantees and securities of the original obligation
Even if the debtor does not agree after the creditor accepts the payment from the third person, the obligation will still be extinguished because the creditor has accepted it
A thing different from that due cannot be offered or demanded against the will of the creditor or debtor, as the case may be. The act to be performed or the act prohibited cannot be substituted against the obligee's will
If the obligation consists in the delivery of a generic thing, the purpose of the obligation and other circumstances shall be taken into consideration to determine the quality or kind of thing to be delivered