Quick answer

An heir generally cannot sell the other heirs’ shares in inherited property without their consent. Before partition, the heirs own the estate in common, subject to the deceased’s debts. One heir may sell only his or her hereditary rights or undivided share. Even if the deed describes the entire property, the sale ordinarily binds the other heirs only to the extent of the seller-heir’s eventual share; the buyer does not automatically become owner of the whole property.

The result changes if:

The property was already validly partitioned and awarded exclusively to the seller-heir. That heir may generally sell it without the former co-heirs’ consent.
All heirs authorized or later ratified the sale.
A court-authorized executor or administrator sold estate property in accordance with the Rules of Court.
An heir used a false affidavit of self-adjudication, a defective extrajudicial settlement, forged signatures, or an unauthorized power of attorney. The affected heirs may seek nullification, reconveyance, cancellation or correction of title, partition, accounting, damages, and urgent protective relief.
The property has reached a later buyer who claims to be an innocent purchaser for value. Recovery of the land may then depend on the title, annotations, possession, the buyer’s knowledge, and whether circumstances required further inquiry.

Do not assume that an unauthorized sale is automatically void in full—or that there is no deadline because the family never consented. Obtain the documents and consult a Philippine property or succession lawyer promptly.

What each heir owns before partition

Successional rights pass from the moment of the decedent’s death. When there are two or more heirs, however, Article 1078 of the Civil Code provides that the whole estate is owned in common before partition, subject to payment of the deceased’s debts.

This means that, until a valid partition:

Each heir owns an ideal or undivided interest in the estate, not a particular bedroom, floor, farm section, or numbered portion of a lot.
The precise share may still depend on the will, compulsory heirs, the decedent’s marital-property regime, prior donations, debts, taxes, and other estate matters.
No single heir may validly convey the other heirs’ interests merely because that heir possesses the title, pays the real-property tax, occupies the land, or manages the property.

Article 493 nevertheless allows a co-owner to sell, assign, or mortgage his or her own part. The transaction’s effect against the other co-owners is limited to whatever portion may eventually be allotted to the seller when the co-ownership ends.

The Supreme Court has repeatedly applied this rule: a sale of the entire co-owned property by only one co-owner is not necessarily void in its entirety. It generally transfers only the seller’s undivided interest and makes the buyer a co-owner to that extent. See Heirs of Apolinario Caburnay v. Heirs of Teodulo Sison.

The stage of the estate matters

Situation	General legal effect
The supposed “inheritance” is being sold while the owner is still alive	There is ordinarily no acquired inheritance yet. Contracts over future inheritance are generally prohibited, subject to limited exceptions expressly allowed by law.
The owner has died, but the estate has not been partitioned	An heir may dispose of an undivided share or hereditary rights, but not the other heirs’ shares or a definite portion as exclusively his or hers.
The property was validly partitioned and awarded solely to the seller-heir	The seller generally owns that property exclusively and need not obtain the former co-heirs’ consent.
All heirs signed the sale or gave valid authority through a special power of attorney	The sale may bind all participating or represented heirs within the authority actually granted.
An executor or administrator obtained proper court authority to sell estate property	The sale may bind the estate even without every heir’s individual consent, subject to the probate court’s order and applicable rules.
One heir falsely claimed to be the sole heir or excluded another heir from an extrajudicial settlement	The settlement and resulting transfers may be challenged; the precise effect on later buyers is fact-dependent.

What the buyer acquires from only one heir

If the sale was limited to the seller-heir’s undivided share, the buyer normally steps into that heir’s position. The buyer may participate in the co-ownership and eventual partition, but cannot lawfully treat the whole property—or an arbitrarily selected physical portion—as exclusively his or hers.

If the deed purported to sell the whole parcel, the buyer ordinarily acquires, at most, the seller’s share, subject to the outcome of partition. The non-selling heirs retain their corresponding interests.

For example, if three heirs ultimately have equal shares and only one heir sells the entire parcel without authority from the other two, the buyer does not automatically acquire 100% of the land. As a general rule, the buyer may acquire only the seller’s one-third undivided interest. The actual outcome can change if the shares are unequal, the seller later acquires the other interests, the transaction is ratified, or the partition assigns the relevant portion to the seller.

Neither the buyer nor the seller-heir may simply identify a preferred part of the land and exclude the others before partition. A buyer who possesses or earns income from more than the acquired share may also face an accounting for rents, harvests, or other fruits.

When an extrajudicial settlement is defective

Under Section 1, Rule 74 of the Rules of Court, an extrajudicial settlement is available when the decedent left no will and no debts and all heirs are adults, or minors are represented by duly authorized judicial or legal representatives. The settlement must be in a public instrument, filed with the Registry of Deeds when real property is involved, and published as required. A sole heir may use an affidavit of self-adjudication only if that person is truly the only heir.

An extrajudicial settlement is not binding on a person who did not participate in it or had no notice of it. The Supreme Court has also held that an extrajudicial partition executed with the total exclusion of a legal heir who had no knowledge of or consent to it may be fraudulent and void. Forged deeds likewise convey no title from the person whose signature was forged. See Spouses Rol v. Racho.

However, nullifying the partition does not always nullify every aspect of a later sale. If the seller was genuinely an heir, a court may still recognize the transfer to the extent of that heir’s true undivided share. A sale to a later innocent purchaser for value may present additional issues.

If there is a will, it must generally be proved and allowed by the proper court before it can pass property. A purported extrajudicial settlement should not be used to bypass probate of a will.

Available legal remedies

The correct remedy depends on what was sold, whose names appear on the title, whether the estate was settled, and whether the buyer has registered or transferred the property again.

1. Verify the title and transaction immediately

Obtain a current certified true copy of the OCT, TCT, or CCT—not merely a photocopy held by a relative. Check:

The registered owner and all co-owners
The date and entry number of the questioned sale
Any extrajudicial settlement or affidavit of self-adjudication
Mortgages, adverse claims, notices of lis pendens, Rule 74 liens, and other annotations
Whether a new title has already been issued
Whether there have been further transfers

A certified true copy may be requested through the LRA eSerbisyo portal or from an appropriate computerized Registry of Deeds. Supporting deeds and registration records may require a direct request to the Registry of Deeds where the property is registered.

2. Send a documented written demand

Through counsel when possible, notify the seller and buyer that:

You claim a specific hereditary or co-ownership interest.
You did not sign, authorize, or ratify the sale.
The seller had no authority to convey your share.
You demand copies of the deed, settlement, power of attorney, title, and proof of payment.
You object to any resale, mortgage, construction, eviction, or destruction of the property.
You reserve the right to partition, accounting, reconveyance, cancellation of title, damages, redemption, and provisional remedies.

A written demand creates a reliable record of the claim and of the recipients’ knowledge. It does not, by itself, cancel a deed or title and should not be treated as a substitute for timely court action.

3. Exercise legal redemption when available

Redemption may be preferable when the family wants to keep the outsider from remaining in the co-ownership.

Sale of hereditary rights before partition

Under Article 1088, when an heir sells hereditary rights to a stranger before partition, any co-heir may take the purchaser’s place by reimbursing the purchase price. The co-heir must act within one month from written notice of the sale by the seller-heir.

Sale of a share in a particular co-owned property

Articles 1620 and 1623 govern legal redemption when a co-owner’s share in a particular property is sold to a third person. The right must generally be exercised within 30 days from written notice by the prospective vendor or vendor.

The Supreme Court distinguishes a sale of hereditary rights in the abstract from a sale of an interest in a particular inherited property. The former generally falls under Article 1088; the latter may fall under Articles 1620 and 1623.

Written notice is important because it identifies the completed transaction, price, terms, and starting date of the short redemption period. See Cua v. Vargas. Because disputes can arise over whether a deed or other document constituted sufficient written notice, anyone considering redemption should seek counsel immediately, communicate an unequivocal exercise of the right, and be ready to reimburse or tender the legally required amount.

Redemption does not ordinarily allow the co-heir to rewrite the bargain. The redemptioner generally replaces the buyer on the same lawful terms, subject to rules on an allegedly grossly excessive price.

4. Seek partition and accounting

Article 494 allows a co-owner to demand partition. In an action under Rule 69, the court may:

Determine whether co-ownership exists and identify the parties’ shares
Decide whether partition is legally proper
Confirm an agreed division or appoint commissioners if the parties cannot agree
Direct an accounting of rents, produce, income, expenses, taxes, and improvements
Allocate the portion corresponding to the seller’s share to the buyer when legally possible
Order a sale and distribution of proceeds if the property cannot be divided without serious prejudice and the parties cannot agree on another arrangement

All persons whose interests will be affected—including the seller, buyer, registered owners, and other co-heirs—should ordinarily be joined. Leaving out an indispensable party can delay or defeat the case.

5. Challenge fraudulent or unauthorized instruments

Depending on the documents and relief required, an affected heir may seek one or more of the following:

Declaration of nullity or ineffectiveness of the deed as to the non-consenting heirs’ shares
Annulment or nullification of an extrajudicial settlement or affidavit of self-adjudication
Cancellation or correction of resulting titles
Reconveyance of the property or hereditary share
Quieting of title or removal of a cloud
Recovery of possession
Partition and accounting
Damages against parties who acted fraudulently or in bad faith

Unless an estate or heirship proceeding is already pending, compulsory or intestate heirs may generally file an ordinary civil action to enforce ownership acquired by succession without first obtaining a separate declaration of heirship. Any determination of heirship in that action is limited to the parties and issues before the court. See the Supreme Court’s en banc ruling in Treyes v. Larlar.

If an estate proceeding is already pending, the challenge may have to be raised in that proceeding rather than through a separate case.

6. Protect the property while the case is pending

If another sale, mortgage, demolition, eviction, or construction is imminent, counsel can assess whether to seek:

A temporary restraining order
A preliminary injunction
A notice of lis pendens after filing an action directly affecting title, possession, use, or occupation
Other appropriate provisional relief

A notice of lis pendens warns later transferees that the property is in litigation. It is not a shortcut for filing a proper case and should not be annotated without a legally qualifying action.

7. Consider a criminal complaint when documents were falsified

A civil dispute over the scope of an heir’s share is not automatically a crime. Criminal issues may arise, however, if evidence shows forged signatures, a knowingly false affidavit of sole heirship, falsified notarization, fraudulent use of identification documents, or deceit in obtaining money or registration.

Preserve the original evidence before approaching law enforcement or the prosecutor. Criminal liability, the proper offense, and prescription depend on the exact document, participants, dates, and acts; they should not be assumed from the family dispute alone.

The buyer’s claim of good faith

A later buyer may argue that he or she relied on a clean title and paid full value without notice of another person’s claim. Good faith is highly factual.

Reliance on the face of a title is strongest when the seller is the registered owner, is in possession, and neither the title nor surrounding facts indicate another person’s interest or a defect in the seller’s authority. If the seller is not the registered owner, another family occupies the property, the title remains in the decedent’s name, a Rule 74 lien or adverse claim appears, or the buyer knows of other heirs, reasonable inquiry may be required. See Chua v. People.

A good-faith defense can affect whether the property itself may be recovered from a later transferee. Even when recovery of the land becomes difficult, claims against the heir who made the unauthorized or fraudulent transfer may remain. The answer depends on the title history and the relief pleaded.

Deadlines that require special attention

Thirty days or one month for redemption

The Article 1088 and Article 1623 periods are extremely short and are tied to written notice. Do not wait for a family meeting after receiving a deed, demand letter, or formal notice of sale.

The two-year Rule 74 period

Section 4, Rule 74 allows an heir or another person unduly deprived of lawful participation to compel settlement within two years after the summary settlement and distribution. The estate’s real property and the required bond may remain charged during that period. Rule 74 also contains a limited extension for a claimant who, when the two-year period expires, is a minor, mentally incapacitated, imprisoned, or outside the Philippines.

The two-year period is not a universal deadline that automatically defeats every excluded heir. The Supreme Court has explained that Rule 74’s special remedy does not necessarily bar an ordinary civil action by a person who did not participate in or have notice of the extrajudicial settlement. Still, waiting is dangerous because other limitation rules, later transfers, loss of evidence, and defenses such as prescription or laches may arise.

Other prescriptive periods vary

Depending on the cause of action, courts may examine periods applicable to fraud, injury to rights, written obligations, implied or constructive trusts, recovery of immovable property, void instruments, or repudiation of co-ownership. Registration of a new title may be treated as notice for some reconveyance claims. On the other hand, prescription generally does not run between co-heirs while the co-ownership continues to be recognized; clear repudiation communicated to the other co-owners may change that analysis.

There is no safe single deadline for all unauthorized inheritance sales. Have counsel calculate the periods from the death, settlement, written notice, registration, discovery, demand, dispossession, and any clear repudiation.

Evidence to preserve

Collect and keep secure copies of:

The decedent’s PSA death certificate
Birth, marriage, adoption, and other civil-registry records establishing the family relationship
The original will, if any, and all probate or estate orders
Current and historical certified copies of the land title
The deed of sale, extrajudicial settlement, affidavit of self-adjudication, partition agreement, and powers of attorney
Registry of Deeds entry details, receipts, and supporting documents
Notarial details, including the notary’s name, commission information, document number, page, book, and series
Identity documents allegedly presented by the signatories
Tax declarations, real-property tax receipts, estate-tax documents, and relevant BIR certificates
Written notices of sale and proof of the date received
Text messages, emails, letters, recordings lawfully obtained, and admissions about the sale or other heirs
Bank records, receipts, or other proof of the purchase price
Photos, surveys, leases, harvest records, rent records, and proof of occupancy or improvements
Specimen signatures and original documents if forgery is suspected
A dated chronology of when each heir learned of the death, settlement, sale, registration, possession, and subsequent transfers

Tax declarations and tax payments may support a claim but do not, by themselves, conclusively establish ownership.

Common mistakes to avoid

Assuming the entire sale is automatically void. It may remain effective as to the seller-heir’s actual share.
Assuming possession of the owner’s duplicate title gives one heir authority to sell everyone’s shares.
Signing a quitclaim, waiver, confirmation, receipt, or compromise without understanding whether it ratifies the sale.
Accepting part of the purchase price without documenting whether it is compensation, settlement, or a reservation of rights.
Relying only on a photocopy of the title instead of obtaining a current certified copy.
Treating publication of an extrajudicial settlement as proof that every omitted heir personally knew and consented.
Waiting because no formal written notice was received. The redemption clock may be disputed, while other claims can face different deadlines.
Trying to remove the buyer forcibly, destroy improvements, or occupy a selected portion through self-help.
Filing against only the seller while omitting the buyer, current registered owner, or other indispensable parties.
Recording an adverse claim or lis pendens without confirming that the legal requirements are met.
Believing the expiration of the two-year Rule 74 annotation automatically validates fraud or extinguishes every excluded heir’s claim.

When legal help is urgent

Seek immediate assistance if:

You received written notice of the sale and may want to redeem.
The buyer is about to register, resell, mortgage, subdivide, build on, or demolish structures on the property.
A new title has already been issued or a second buyer is involved.
You face eviction, fencing, harvest removal, or exclusion from the property.
The settlement or distribution occurred less than two years ago.
A signature, notarization, affidavit of self-adjudication, or power of attorney appears false.
A minor, incapacitated heir, heir abroad, or deceased heir’s descendants were omitted.
There is a pending probate, administration, foreclosure, expropriation, or land-registration case.
The buyer claims to have relied on a clean title.
Many years have passed and there may have been a clear repudiation of co-ownership.

Actions affecting title to or possession of real property are generally filed where the property, or a portion of it, is located. Under Republic Act No. 11576, jurisdiction over real actions generally turns on assessed value: first-level courts have jurisdiction when the assessed value does not exceed ₱400,000, while the RTC generally has jurisdiction when it exceeds ₱400,000. The nature of the principal relief and combined claims can affect this classification. Barangay conciliation may also be a precondition when the parties and dispute fall within the lupon’s authority.

Frequently asked questions

Can one heir sell an inherited house without the others signing?

Before partition, the heir may generally sell only his or her undivided share or hereditary rights. The buyer does not acquire the other heirs’ interests merely because the deed describes the entire house and lot.

Does the sale become completely void?

Not necessarily. It may be ineffective against the non-consenting heirs but remain binding as to the seller-heir’s actual share. Forgery, total exclusion from an extrajudicial settlement, lack of authority, and later good-faith purchasers can change the result.

Can the other heirs cancel the deed at the Registry of Deeds themselves?

Generally, no. The Registry of Deeds ordinarily will not adjudicate a contested ownership claim or cancel a registered deed or title merely upon one heir’s demand. A voluntary corrective instrument signed by the necessary parties or a final court order is commonly required.

Can the heirs buy the share back?

Possibly. Article 1088 or Articles 1620 and 1623 may provide legal redemption, generally within one month or 30 days from the required written notice. The correct provision depends on whether hereditary rights in the estate or a share in a particular property was sold.

What if the selling heir used an affidavit claiming to be the only heir?

A false affidavit of self-adjudication may be challenged through an action for nullity, cancellation or correction of title, reconveyance, partition, and related relief. Possible criminal liability depends on proof of the false statement, intent, use of the document, and resulting acts.

What if the buyer already has a new title?

The claim is not automatically lost, but it becomes more complex. The court will examine the source of the title, annotations, possession, the buyer’s knowledge, payment of value, and whether suspicious circumstances required further inquiry.

Can an excluded heir sue without a prior court declaration of heirship?

Generally, yes, if no estate or heirship proceeding is pending. Under Treyes v. Larlar, an heir may bring an ordinary civil action to enforce inherited ownership rights, with the heirship determination limited to that case and its parties.

Can a co-heir keep the property merely by possessing it for many years?

Not ordinarily while that co-heir continues to recognize the co-ownership. Prescription against other co-heirs generally requires a clear and unequivocal repudiation made known to them, followed by the legally required adverse possession. Long possession alone is not always enough.

Official legal sources

This article provides general Philippine legal information, not legal advice or a prediction of any case’s outcome. Rights and remedies depend on the complete title history, estate records, family relationships, possession, notices, and transaction documents. Sources and procedures were checked as of 1 August 2026.