Short answer. Conventional subrogation is an agreed substitution of a new creditor for the old one, which extinguishes the original obligation and creates a new one in its place. Unlike an ordinary assignment of credit, it does not work unless the debtor himself consents, along with the old creditor and the newcomer.
What the law says
Conventional subrogation of a third person requires the consent of the original parties and of the third person.
Civil Code, Article 1301 — Conventional Subrogation. Read the full provision →
The consent requirement is the whole point
Article 1301 of the Civil Code is short and unforgiving: conventional subrogation requires the consent of the original parties and of the third person. Three consents, not two. The original creditor must agree to step out, the third person must agree to step in, and — this is the part people miss — the debtor must agree as well. A subrogation the debtor never agreed to is not a subrogation at all. It is called conventional because it springs from the parties' agreement rather than from the operation of law, which is the other way a creditor can be substituted.
How it differs from an assignment of credit
An assignment of credit transfers the same claim to a new holder. The obligation survives intact, with all its accessories, and the debtor's agreement is not needed — he only needs to be notified, so he knows whom to pay. Conventional subrogation does something more drastic. It extinguishes the old obligation and substitutes a new one, so accessory rights such as guaranties and mortgages can fall away unless expressly carried over. That difference decides real money. Whether your document is one or the other turns on what the parties actually intended, not on the title typed at the top of the page.
What it does not do
Subrogation does not enlarge the claim. The new creditor takes what the old creditor had — no more, and burdened by the same defences the debtor could have raised before. If the underlying debt was already paid, prescribed, or void, subrogation transfers a worthless right. It also does not make the old creditor a guarantor of the debtor's solvency unless he agreed to that. And it binds only those who consented; a co-debtor or surety who was never party to the arrangement is not automatically carried into the new obligation.
If you are the debtor, the creditor, or the newcomer
Get all three consents in writing, dated, and in one document if possible. If you are paying someone else's debt and expect to take over the creditor's security, say so expressly — the security does not follow by itself. If you are the debtor and are being told a stranger now owns your loan, ask which arrangement it is: without your consent it can only be an assignment, and you are entitled to proper notice before you can safely pay the new party. This is general legal information rather than advice on your own papers. If a lender or a third party is claiming rights over a debt you owe or are owed, you can book a consultation to have the documents read.
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.
- Abelardo B. Licaros vs. Antonio P. Gatmaitan, G.R. No. 142838, August 9, 2001 — read the decision on LawPhil →
- Elsa B. Reyes vs. Court of Appeals, et al, G.R. No. 120817, November 4, 1996 — read the decision on LawPhil →