Confusion or merger of the rights of creditor and debtor
Compensation
Novation
Causes of extinguishment of obligation
Death
Mutual desistance or withdrawal
Arrival of resolutory period
Compromise
Impossibility of fulfillment
Happening of a fortuitous event
Modes of extinguishment of obligation
Voluntary: Performance, Substitution, Dacion en pago, Novation, By release agreement, Mutual waiver, Unilateral waiver, Remission, Resolutary condition, Extinctive period
Involuntary: Confusion, Death of the contracting parties, Loss of the thing due, Impossibility of performance, Failure to exercise (right of action)
Payment
Not only the delivery of money but also the performance, in any other manner, of an obligation
Elements of payment
Persons who may pay and to whom payment may be made
Thing or object in which payment must consist
The cause thereof
The mode or form thereof
The place and the time in which it must be made
The imputation of expenses occasioned by it
The special parts which may modify the same and the effects they generally produce
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
Requisites for a valid payment
Integrity of prestation - the prestation must be fulfilled completely
Identity of prestation - the very prestation due must be delivered
Burden of proving payment
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
Substantial performance in good faith
The obligor may recover as though there had been a strict and complete fulfillment, less damages suffered by the obligee
Requisites for the application of Article 1234
There must be substantial performance
The obligor must be in good faith
Requisites for Article 1235 to apply
The obligee knows that the performance is incomplete or irregular
He accepts that the performance without expressing any protest or objection
Persons from whom the creditor must accept payment
The debtor
Any person who has an interest in the obligation
A third person who has no interest in the obligation when there is stipulation that he can make payment
Effect of payment by a third person
If made without the knowledge or against the will of the debtor, the recovery is only up to the extent or amount of the debt at the time of payment
If made with knowledge of the debtor, the payer shall have the rights of reimbursement and subrogations
Subrogation and reimbursement distinguished
In subrogation, the person who pays for the debtor is put into the shoes of the creditor
In reimbursement, the third person 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
Payment by a third person without intention to be reimbursed
It may be considered as a donation with the consent of the debtor
Even if the debtor does not agree after the creditor accepts the payment, the obligation will still be extinguished