Short answer. Against your seller, yes. Against everyone else, no. Article 709 provides that titles of ownership or other rights over immovable property not duly inscribed or annotated in the Registry of Property shall not prejudice third persons — so an unregistered deed simply does not reach them.
What the law says
The titles of ownership, or of other rights over immovable property, which are not duly inscribed or annotated in the Registry of Property shall not prejudice third persons.
Civil Code, Article 709 — Unregistered Titles Bind Only The Parties. Read the full provision →
A valid sale and an effective one are not the same thing
The deed did its work as between you and the seller: he cannot deny the sale, and you can compel him to perform. Registration is about a different audience. What the article withholds from an unregistered title is the power to prejudice third persons — people who were not party to your transaction and who deal with the land on the strength of what the register shows. To them your deed is invisible, and no amount of notarisation changes that, because notarisation authenticates the document rather than publishes it.
The risk this exposes you to
The seller still appears on the register as owner, and the register is what buyers, banks and creditors rely on. He can sell the same land again, mortgage it, or have it levied on by his own creditors, and each of those people is dealing with a title that carries no sign of you. Where the same immovable is sold twice, ownership is decided by rules that favour the buyer who registered first in good faith — which is exactly the contest an unregistered deed is designed to lose.
What can still save an unregistered buyer
Good faith on the other side is the pivot. A person who knew about your purchase, or who was in a position where he could not have failed to know, does not get the protection the register gives. Actual possession is the most common way that knowledge arises — a buyer who inspects and finds someone else living on and using the land is on notice of a claim, whatever the title says. So occupation matters, but it is a defence to be relied on only when registration is genuinely impossible, not a substitute for it.
Register, and find out first what is already on the title
Get a certified true copy of the certificate of title from the registry before anything else — it tells you who is currently registered, what annotations exist, and whether a later transaction has already been recorded. Then complete the transfer: the notarised deed, the seller's owner's duplicate certificate, and proof that the taxes on the sale have been paid are what the process needs. If the seller is uncooperative or unreachable, that is the point at which the delay stops being administrative and needs advice.
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.
- San Lorenzo Village Asso., Inc. vs. Court of Appeals, et al, G.R. No. 116825, March 26, 1998 — read the decision on LawPhil →
- Sps. Juan and Antonia Cano, et al. vs. Sps. Arturo and Emerenciana Cano/Sps. Juan Cano and Antonia Soriano-Cano vs. Sps. Arturo Cano and Emerenciana Decasin, G.R. No. 188666 / G.R. No. 190750, December 14, 2017 — read the decision on LawPhil →
- Sps. Victor Valdez and Jocelyn Valdez etc. vs. Sps. Francisco & Caridad Tabisula, G.R. No. 175510, July 28, 2008 — read the decision on LawPhil →