Subrogation is the substitution of one person to the rights of another. There are two types of subrogation: Conventional and Legal.
When subrogation occurs, the obligation is only extinguished for the original obligee. Performance of the obligation by the party in whose favor subrogation occurs causes that party to be substituted as obligee.
(1) Real Rights and Real Obligations
A Real right is a right in a thing that’s good against the world.
A Real obligation is an obligation incurred as a result of a real right.
(2) Strictly Personal and Heritable Obligations
An obligation is heritable if it can be enforced by or against the successors of the original obligors and obligees. Thus, heritability concerns only the question of whether a 3rd party can be substituted or added to the obligation.
A strictly personal obligation is an obligation that is only enforceable by the original obligee or against the original obligor (thus, it's not heritable.
(3) Conditional Obligations
Conditional obligation is an obligation whose occurrence depends on an uncertain event. Uncertainty over whether the event will occur is the key ingredient for a conditional obligation. If the event is certain to occur, the condition isn't conditional but rather a condition subject to a term.
(4) Obligations with Several People
Several obligations exist when separate performances are owed. Several obligations are treated as separate obligations, and produce the same legal impact as obligations incurred through different juridical acts.
Joint obligations exist for obligors when one performance is owed, and when no joint obligor is bound for the whole and no joint obligee is entitled to receive the whole performance.
An obligation is solidary for the obligors when each owes the whole performance, and solidary for the obligees when each is entitled to receive the whole performance.
(1) Novation is the extinguishment of an existing obligation by the substitution of a new obligation.
(2) There are objective and subjective novations.
(A) Objective Novation is the substitution of a new performance or a new cause in place of the original performance or cause. In this type of novation, the obligor remains the same, but a new obligation is substituted for the original obligation.
(B) Subjective Novation is the substitution of a new obligor for the original obligor. To constitute novation, the prior obligor must be discharged on account of the substitution. Subjective novation can occur generally even without the original obligor's consent.
(C) Effects of Novation - If a novation is made by the obligee and one of the obligors in a solidary obligation, the other solidary obligors are released. If the obligee wants the other solidary obligors to remain bound, the obligors must all consent to the new obligation.
(3) Remission of Debt is the voluntary relinquishment by the obligee of her right to demand performance. A remission of debt extinguishes the obligation. A remission of debt is effective when the obligor receives communication from the obligee.
A natural or moral obligation is an obligation that is not legally enforceable but an obligation that compels the obligor to perform due to moral compulsion.
Natural or Moral obligations produce 3 outcomes:
(1) No Judicial Action for Obligee – A natural obligation isn’t enforceable by judicial action. Thus, the obligee can’t compel performance and the obligor isn’t bound to render a performance.
(2) No Reclamation of Freely Rendered Performance – A performance freely rendered in compliance with a natural obligation can’t be reclaimed.
(3) New Contract May Be Enforceable – A new contract made for the performance of a natural obligation is onerous, not gratuitous. Generally, this means that a new promise to perform made by the obligor of a natural obligation will elevate the debt into a fully enforceable obligation. However, the promise must be express, in language that shows “a clear, distinct, and unequivocal recognition and renewal of the debt as a binding obligation, anything short thereof being insufficient.” A mere acknowledgment of the debt isn’t an express promise to pay, nor is partial payment.