Can I use a defense that's personal to my co-debtor, like his being a minor when the loan was signed, to avoid paying my own share of a solidary debt?

Three kinds of defence, and only two are fully yours

Article 1222 of the Civil Code sorts defences by who they belong to: A solidary debtor may, in actions filed by the creditor, avail himself of all defenses which are derived from the nature of the obligation and of those which are personal to him, or pertain to his own share. Defences drawn from the obligation itself are common property and defeat the whole claim. Defences personal to you protect you. Defences that belong to somebody else are borrowed, and the article lets you borrow them only up to the size of that person's exposure.

Why your co-debtor's minority does not rescue you

The second sentence supplies the arithmetic: With respect to those which personally belong to the others, he may avail himself thereof only as regards that part of the debt for which the latter are responsible. Incapacity attaching to one signer is a circumstance of that signer, not a flaw in the obligation you assumed. On a debt of three hundred thousand split three ways, the minority of one co-debtor lets you knock out his hundred thousand and no more; the creditor may still recover the remaining two hundred thousand from you alone, because solidarity means each of you answers for the rest.

The defences that do end the whole claim

It is worth separating the two categories carefully, because they are argued very differently. A defence derived from the nature of the obligation attacks the debt itself — that it was already paid, that it has been extinguished, that it never validly came into existence, or that it is not yet demandable. Those benefit every debtor because there is nothing left to collect from anyone. A personal defence, by contrast, concedes that the debt exists and says only that this particular person cannot be made to answer for it, which is precisely why its effect is capped at that person's share.

What to check before you concede anything

Two things decide how much of this matters to you. The first is whether the obligation is solidary at all: Article 1207 requires that solidarity be expressly stipulated or imposed by law or by the nature of the obligation, and Article 1208 otherwise presumes the debt divided into equal shares. The second is what you can recover afterwards, since Article 1217 lets a debtor who pays claim each co-debtor's corresponding share with interest. Read the promissory note itself rather than the collection letter — the letter will always describe the obligation in the creditor's preferred terms.

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.

• Philippine Blooming Mills, Inc., et al. vs. Court of Appeals, et al, G.R. No. 142381, October 15, 2003 — read the decision on LawPhil →
• Gloria Paje, Lolita Gomez, Miriam Catacutan, Estrella Zapata, Gloria Sumang, Juanita Julieta Dingal, Myra Amante, and Fe S. Bernardo vs. Spic N' Span Service Corporation, G.R. No. 240810, February 28, 2022 — read the decision on LawPhil →
• JAPRL Development Corp., et al. vs. Security Bank Corporation, G.R. No. 190107, June 6, 2011 — read the decision on LawPhil →
• Lafarge Cement Philippines Inc., et al. vs. Continental Cement Corporation, et al, G.R. No. 155173, November 23, 2004 — read the decision on LawPhil →

Related provisions

• Civil Code, Article 1222 — Defenses of a Solidary Debtor
• Civil Code, Article 1207 — Joint and Solidary Liability Defined
• Civil Code, Article 1208 — Presumption of Joint Obligation
• Civil Code, Article 1216 — Creditor May Sue Any Solidary Debtor
• Civil Code, Article 1217 — Payment by a Solidary Debtor; Reimbursement