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Article 1156
The obligation referred to in the above article is a civil obligation, meaning, only those obligations which if not performed by one party, the other party may go to court to enforce the obligation or simply to hold such person to pay for damages.
Passive Subjects
otherwise known as the obligor or debtor, is the person who has the duty to fulfil the obligation or the prestation.
Active subject
is the person who has the power to demand the fulfilment of the obligation; he is sometimes called the creditor or obligee.
Presentation
is the object of the obligation either to give, to do, or not to do.
Juridical Tie
is the vinculum or that which binds the debtor and creditor.
Law
obligations arising from law are not presumed only those obligations expressly determined by law are demandable.
Contracts
Under article 1305, Contract is a meeting of the minds whereby one binds himself with respect to other to give something or render some services.
Quasi Contracts
This source of obligation is based on the principle of unjust enrichment, meaning no one shall be enriched at the expense of the other.
Acts or omission punishable by law
Under the Revised Penal Code of the Philippines, any person criminally liable is also civilly liable. The civil liability pertains to the damages that must be paid arising from the offense committed
Quasi Delicts
Under the Civil Code, whoever will cause damage or injury to another due to fault or negligence, there being no pre-existing contractual obligation, shall be held liable for damages.