At what moment is a contract perfected under Philippine law?

Mere consent is enough

People routinely believe that nothing is binding until a document is signed and notarised. For most contracts that is wrong. The Civil Code says contracts are perfected by mere consent. Once the parties have agreed on the thing and the cause of the obligation, the contract exists. A sale agreed by message, a lease agreed in a meeting, a service engagement confirmed by email — each can be a real contract with real liability for breach. Writing and notarisation matter for other reasons: proving what was agreed, and satisfying particular requirements the law imposes on certain transactions. They are not usually what brings the contract into being.

You are bound by more than the words

The second half of the article is the part that costs people money. From perfection the parties are bound not only to what was expressly stipulated but also to all the consequences which, according to the nature of the contract, are in keeping with good faith, usage and law. So a contract carries obligations nobody wrote down: to deal honestly, to do what the transaction obviously requires, to observe the customs of the trade, and to comply with the provisions the law reads into that type of contract. A seller cannot say a duty does not exist merely because the one-page agreement is silent on it.

The exceptions to consent alone

Not every contract is consensual. Real contracts — such as deposit, pledge and commodatum — are perfected only by the delivery of the thing, so an agreement to lend without handing anything over does not yet create the contract. Formal or solemn contracts are perfected only when the form the law prescribes is observed; a donation of immovable property, for instance, must be in a public instrument, and failure of form there is fatal rather than merely evidentiary. Certain agreements must also be in writing to be enforceable in court under the statute of frauds. Knowing which category your transaction belongs to is the first question, not an afterthought.

What perfection does not settle

Perfection is only one of three stages. Before it is negotiation, where an offer can still be withdrawn and a counter-offer kills the original proposal. After it is consummation, when the obligations are actually performed. Perfection also does not decide whether ownership or risk has passed, which turns on delivery and on the terms of the particular contract. And a perfected contract can still be attacked — for a defect in consent, for want of capacity, or as void — through remedies with their own deadlines. If someone tells you a deal is not binding because nothing was signed, treat that as a claim to be checked with counsel, not a fact.

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.

• Korean Air Co., Ltd and Suk Kyoo Kim vs. Adelina A.S. Yuson, G.R. No. 170369, June 16, 2010 — read the decision on LawPhil →
• C.F. Sharp & Co. Inc. and John J. Rocha vs. Pioneer Insurance and Surety Corporation, et al, G.R. No. 179469, February 15, 2012 — read the decision on LawPhil →
• Equatorial Realty, et al. vs. Mayfair Theater, G.R. No. 106063, November 21, 1996 — read the decision on LawPhil →
• Spouses Feliciana and Angel Cesa vs. Spouses Elisa Montano Brucelas and David Brucelas, G.R. No. 255564, March 5, 2025 — read the decision on LawPhil →

Related provisions

• Civil Code, Article 1315 — Perfection by Consent (Consensual Contracts)