Short answer. A guarantor binds himself to the creditor to fulfill the debtor's obligation only if the debtor fails to do so. A surety is someone who binds himself solidarily with the principal debtor, which the law treats as a distinct kind of contract called a suretyship.
What the law says
By guaranty a person, called the guarantor, binds himself to the creditor to fulfill the obligation of the principal debtor in case the latter should fail to do so.
Civil Code, Article 2047 — Guaranty and Suretyship. Read the full provision →
What a guarantor commits to
In an ordinary guaranty, the guarantor binds himself to the creditor to fulfill the obligation of the principal debtor in case the latter should fail to do so. That phrasing ties the guarantor's obligation to the debtor's own failure; the guarantor's role is to stand behind the debtor, stepping in only once it is established that the debtor has not performed. It is a secondary, conditional commitment rather than an obligation that exists on exactly equal footing with the debtor's.
What changes when the commitment is solidary
The same article addresses what happens when a person instead binds himself solidarily with the principal debtor: the law says the provisions on solidary obligations apply, and calls the resulting contract a suretyship rather than a guaranty. Binding oneself solidarily means the creditor is not limited to treating the commitment as merely secondary or conditional on the debtor's default in the same way an ordinary guaranty works.
Why the label in the contract is not decisive
Whether a particular arrangement is a guaranty or a suretyship depends on how the obligation is actually structured, solidary or not, rather than solely on whatever word is written on the document. A document titled "guaranty" that in substance binds the signer solidarily with the debtor would be treated according to that substance. This is why the exact wording used when someone agrees to answer for another's debt matters more than the heading at the top of the page.
What this means before you sign
Anyone asked to answer for someone else's loan, as a guarantor or a surety, is taking on a real legal commitment to the creditor, and the two arrangements are not interchangeable in how that commitment is structured. Reading the actual terms, not just the title, of whatever document is being signed is the only way to know which kind of obligation, and which degree of exposure to the debtor's default, is actually being undertaken.
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.
- Playinn, Inc. vs. Prudential Guarantee And Assurance, Inc, G.R. No. 254764, November 29, 2023 — read the decision on LawPhil →
- Subic Bay Distribution, Inc. vs. Western Guaranty Corp, G.R. No. 220613, November 11, 2021 — read the decision on LawPhil →
- The Mercantile Insurance Co., Inc. vs. DMCI-Laing Corporation, Inc, G.R. No. 205007, September 16, 2019 — read the decision on LawPhil →
- Games and Garments Developers, Inc. vs. Allied Banking Corporation, G.R. No. 181426, July 13, 2015 — read the decision on LawPhil →