Under Philippine Civil Law, the extinguishment of obligations due to the "Loss of the Thing Due" is governed by the Civil Code, particularly under the general rules of obligations and contracts. This topic involves specific requisites and conditions that must be met for the loss of the thing due to extinguish an obligation. Below is a meticulous breakdown of the relevant legal provisions, requirements, and implications concerning the extinguishment of obligations by the loss of the thing due, per the Civil Code of the Philippines:

1. Definition and Scope

Under Article 1262 of the Civil Code, an obligation is extinguished when the thing that is the object of the obligation is lost or destroyed without the fault of the debtor and before he has incurred in delay, provided that the obligation involves a specific or determinate thing. This extinguishment applies only if the thing due is determinate and specific, meaning it is explicitly identified and unique, rather than fungible or generic.

2. Requisites for the Extinguishment of Obligation Due to Loss of the Thing Due

For an obligation to be extinguished due to the loss of the thing due, the following requisites must be strictly met:

a. The Thing Must Be a Specific or Determinate Thing

The obligation must involve a determinate or specific thing, meaning it is distinct and identified in a way that it cannot be substituted with any other. For instance, if the obligation involves delivering a specific car with a particular VIN (vehicle identification number), this car is a determinate thing.
If the obligation involves a generic or indeterminate thing (e.g., a generic car of a particular model), the loss of one car does not extinguish the obligation, as the debtor can substitute it with another.

b. The Thing Is Lost Without the Fault of the Debtor

The loss or destruction of the thing must occur without any fault or negligence on the part of the debtor. If the debtor’s fault causes the loss, the obligation is not extinguished, and the debtor remains liable.
For example, if a debtor is supposed to deliver a specific artwork, and it is lost due to accidental fire not attributable to his fault, the obligation is extinguished. However, if the debtor negligently caused the fire, the obligation is not extinguished, and he may be held liable.

c. The Loss Occurs Before the Debtor Is in Delay

The loss of the thing must occur before the debtor incurs delay. According to the Civil Code, a debtor is in delay if he fails to fulfill his obligation upon demand by the creditor when the time for performance has already arrived.
If the thing is lost after the debtor is already in delay, the obligation is not extinguished, and the debtor remains liable. This is based on the principle that the debtor bears the risk of loss once he is in delay.

d. No Substitute or Replacement Available (for Determinate Thing)

Because the obligation involves a specific thing, the principle of substitution is not applicable. The object lost cannot simply be replaced by an equivalent as it is unique. This condition reinforces the necessity of the thing’s uniqueness to invoke this extinguishment rule.

3. When is a Thing Considered "Lost"?

Under the Civil Code, a thing is considered "lost" when:

It perishes completely or is destroyed in a manner that it can no longer be delivered.
It goes out of commerce, meaning it becomes legally unavailable for trade or cannot be delivered as per the legal standards.
It disappears in such a way that its existence is unknown or it is irretrievable, as when a ship sinks and cannot be salvaged.

4. Effects of the Loss of the Thing Due

When the above requisites are met and the thing is lost, the following legal effects apply:

a. Extinguishment of the Obligation

The obligation is extinguished, and the debtor is released from his duty to deliver the lost thing. This discharge is absolute when all requisites are satisfied.

b. Exceptions to Extinguishment Due to Loss

The obligation may not be extinguished even if the specific thing is lost under the following conditions:

When the law expressly provides otherwise.
- Certain provisions in special laws may dictate that the loss of the thing does not extinguish the obligation, particularly in cases involving public interest.
When the parties have stipulated otherwise.
- If the parties expressly agree that the debtor will bear the risk of loss, even if the thing perishes without his fault, the debtor remains liable despite the loss.
When the obligation arises from a crime or quasi-delict (tort).
- In obligations arising from a criminal act or quasi-delict, liability may persist regardless of the loss of the thing. This often involves cases where restitution is part of the punishment or civil liability.
When the debtor incurs in delay.
- As previously noted, if the thing is lost after the debtor has already incurred in delay, the debtor bears the risk of loss, and the obligation is not extinguished.
If the debtor promised to deliver the same thing to two or more persons who do not have the same interest.
- In cases of conflicting multiple obligations for the same specific thing, the obligation to one of the creditors may not necessarily be extinguished, depending on the circumstances and timing.

5. Illustrative Applications of Article 1262

Example 1: A debtor obliges himself to deliver a specific racehorse to a creditor. Before the due date of delivery, the horse dies from natural causes. The obligation to deliver the horse is extinguished.
Example 2: A debtor is supposed to deliver a valuable painting but fails to do so on the agreed date. While the painting is with the debtor, it is accidentally damaged by a third party. Since the debtor was already in delay, he bears the risk and may still be liable to the creditor.

6. Concept of Risk in the Loss of a Specific Thing

Philippine Civil Law adopts the principle of res perit domino ("the thing perishes with its owner"). This means that if the thing perishes without the debtor’s fault and without delay, the creditor who is the ultimate owner bears the risk of loss, leading to the extinguishment of the obligation.

Summary

The extinguishment of obligations by the loss of the thing due is strictly applied under the conditions outlined in the Civil Code, particularly Article 1262. The critical elements involve the uniqueness of the thing (it must be specific or determinate), absence of fault by the debtor, the loss occurring before the debtor’s delay, and lack of any conflicting laws or stipulations to the contrary.