Short answer. Yes. An unenforceable debt can still be guaranteed. Article 2052 provides that although a guaranty cannot exist without a valid obligation, a guaranty may be constituted to guarantee the performance of a voidable or an unenforceable contract — so an oral, unenforceable debt is not beyond the reach of a guaranty.
What the law says
A guaranty cannot exist without a valid obligation. Nevertheless, a guaranty may be constituted to guarantee the performance of a voidable or an unenforceable contract.
Civil Code, Article 2052 — Guaranty Needs a Valid Obligation. Read the full provision →
The general principle, and its exception
Article 2052 opens with the basic rule that a guaranty cannot exist without a valid obligation. A guaranty is accessory: it exists to secure a principal debt, so if there is no real obligation behind it, there is nothing to guarantee. But the same article immediately carves out exceptions. It says that nevertheless, a guaranty may be constituted to guarantee the performance of a voidable or an unenforceable contract. An unenforceable contract — such as certain agreements that were not put in the form the law requires — is not a nullity; it is a genuine obligation that simply cannot be sued upon directly. That is enough to support a guaranty.
Why an oral, unenforceable debt still qualifies
An agreement that the law will not enforce in court because of a formal defect is different from one that never validly existed. The debt is real; what it lacks is the ability to be compelled through a lawsuit in its current state. Article 2052 treats that kind of obligation as a proper subject of guaranty. So the fact that the underlying debt is only oral and unenforceable does not automatically free a guarantor. The law expressly contemplates guaranteeing exactly such a contract, precisely because the obligation itself is not void — it is merely unenforceable as it stands.
What the guaranty draws its strength from
It helps to see why this makes sense. The guarantor voluntarily undertakes to answer for another's obligation, and he does so with knowledge of what that obligation is. Where he agrees to back a contract that is voidable or unenforceable, he is taken to have accepted that risk. Article 2052 also allows a guaranty to secure a natural obligation — one based in equity and conscience though not civilly demandable — which shows how far the law is willing to let a guaranty attach. The unifying idea is that a genuine, if imperfect, obligation can still be guaranteed.
The limits of your exposure
This does not mean every arrangement can bind you as guarantor. There must still be a genuine underlying obligation and an actual guaranty on your part; a guaranty resting on no obligation at all cannot stand under the first sentence of the article. And a guarantor generally retains the defenses and benefits the law gives, and his liability is measured by the terms of what he agreed to secure. But the specific objection 'the debt is only oral and cannot be enforced in court' does not, on its own, defeat a guaranty — Article 2052 was written to cover that very case.
Cases citing this provision
These Supreme Court decisions cite the provision above. We list them so you can read them yourself; the summaries of what each decided are not ours to give.
- Willex Plastic vs. Court of Appeals, et al, G.R. No. 103066, April 25, 1996 — read the decision on LawPhil →