Short answer. Yes, in most cases. Article 1356 of the Civil Code provides that contracts are obligatory in whatever form they are made, as long as all essential requisites for validity are present. The exception is when the law specifically requires a particular form — in those cases, writing is mandatory, not optional.
What the law says
Contracts shall be obligatory, in whatever form they may have been entered into, provided all the essential requisites for their validity are present.
Civil Code, Article 1356 — Form of Contracts. Read the full provision →
The general rule: form does not determine validity
Article 1356 establishes a foundational principle of Philippine contract law: form does not govern validity. A contract made verbally, by a handshake, by exchange of messages, or in any other form is just as binding as a notarised written agreement, as long as it possesses the essential requisites — consent, object, and cause. This is why oral agreements for goods, services, loans, and many other transactions are legally enforceable in the Philippines. The absence of a written document does not make the agreement disappear.
The exception: when the law requires a specific form
Article 1356 contains a clear exception. When the law itself requires a particular form — in order for the contract to be valid or enforceable, or to be proved in a specific way — that requirement is absolute. The article describes it as 'absolute and indispensable.' Examples include donations of immovable property, which must be in a public instrument; contracts of antichresis; and sales of land, which need to be in writing to be enforceable. In those situations, an oral agreement does not simply lack proof — it may actually fail to be valid or enforceable at all.
The practical problem: proof
Even where an oral contract is fully valid, proving its existence and terms in court is a different challenge. If the other side denies the agreement, you need evidence: witnesses who heard the conversation, text messages or emails that confirm the terms afterward, payments made under the agreement, or conduct by both parties consistent with the existence of a contract. The stronger and more contemporaneous your evidence, the better positioned you are. An oral contract is real law; proving it is a factual battle.
When to insist on putting it in writing
Even for transactions where writing is not legally required, putting the agreement in writing is almost always the wiser choice. A written contract captures the exact terms, prevents selective memory after a dispute arises, and is far easier to enforce. If you are relying on an oral agreement that has gone wrong, focus on gathering any documentation that corroborates it: receipts, bank transfers, messages referencing the deal, and witness accounts. A lawyer can assess whether your evidence is strong enough to support a claim and advise on the best approach.
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.
- Cellpage International Corporation vs. The Solid Guaranty, Inc, G.R. No. 226731, June 17, 2020 — read the decision on LawPhil →
- Heirs of Antonio Lopez vs. Spouses Felix and Marita Empaynado, G.R. No. 196517, November 11, 2024 — read the decision on LawPhil →
- Commissioner of Internal Revenue vs. Toledo Power Company, G.R. No. 259309, February 13, 2023 — read the decision on LawPhil →
- Heirs of Angel Yadao, namely: Rufina Yadao, et al. vs. Heirs of Juan Caletina, namely: Hospicio Caletina, Jr., Aniceto Caletina and Florida Caletina, G.R. No. 230784, February 15, 2022 — read the decision on LawPhil →