What counts as good faith when you are claiming ownership of property by prescription?

One standard, borrowed from the law of possession

Article 1128 does not invent a new test; it borrows one. The conditions of good faith required for possession in articles 526, 527, 528, and 529 of this Code are likewise necessary for the determination of good faith in the prescription of ownership and other real rights. Whether you are defending your current possession or counting years toward ownership by prescription, good faith means the same thing, measured by the same provisions. So the question in the title — what counts as good faith for prescription — is answered by the possession articles it points to.

Not aware of any flaw

Article 526 supplies the definition: He is deemed a possessor in good faith who is not aware that there exists in his title or mode of acquisition any flaw which invalidates it. The focus is your state of mind about how you acquired the property — a buyer who honestly believed the seller owned what was sold, an heir who honestly believed the inheritance was regular. Awareness of the defect is what destroys good faith; possessing contrary to the foregoing makes one a possessor in bad faith. The article adds a humane rider: Mistake upon a doubtful or difficult question of law may be the basis of good faith. An honest error on a genuinely hard legal question does not, by itself, condemn the possessor.

Presumed at the start, but it can be lost

Two companion rules complete the picture. Article 527 places the burden where it belongs: Good faith is always presumed, and upon him who alleges bad faith on the part of a possessor rests the burden of proof. You do not have to prove your own honesty; your challenger must prove your knowledge. But Article 528 makes good faith perishable: possession acquired in good faith keeps that character only until facts exist which show that the possessor is not unaware that he possesses the thing improperly or wrongfully. Learning of the defect mid-possession — from a demand letter, a court summons, a discovered document — changes your status from that moment.

Why the label changes the arithmetic

Good faith matters because prescription runs on two tracks. Ordinary acquisitive prescription, which requires good faith and just title, ripens ownership of land in ten years of possession; without them, extraordinary prescription requires thirty. For movable property the periods are shorter, but the same principle governs: the honest possessor is rewarded with a shorter road. A person weighing a prescription claim should therefore gather what shows both elements — the deed or transaction relied on, and the circumstances showing there was no reason to doubt it — and be candid about when, if ever, they first learned something was wrong.

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.

• Desamparados M. Soliva, et al. vs. The Intestate Estate of Marcelo M. Villalba, et al, G.R. No. 154017, December 8, 2003 — read the decision on LawPhil →
• Philippine Long Distance Telephone Company vs. Citi Appliance M.C. Corporation, G.R. No. 214546, October 9, 2019 — read the decision on LawPhil →
• Pen Development Corporation and Las Brisas Resort Corporation vs. Martinez Leyba, Inc, G.R. No. 211845, August 9, 2017 — read the decision on LawPhil →
• Dolores Alejo vs. Sps. Ernesto Cortez and Priscilla San Pedro, Sps. Jorge Leonardo and Jacinta Leonardo and the Register of Deeds of Bulacan, G.R. No. 206114, June 19, 2017 — read the decision on LawPhil →

Related provisions

• Civil Code, Article 1128 — Good Faith Throughout
• Civil Code, Article 526 — Possessor in Good Faith and Bad Faith
• Civil Code, Article 527 — Good Faith Is Presumed
• Civil Code, Article 528 — When Good Faith Ceases