One Co-Owner Signs a Land Sale Agreement Without the Others in Turkey: Is the Transaction Valid? (2026 Updated Guide)

One co-owner signs a land sale agreement without the other owners in Turkey. Learn whether the agreement can transfer the entire property, whether a co-owner may sell only their own share, how title registration affects validity and what foreign buyers should check before paying.

A foreign investor may negotiate the purchase of land in Turkey with a person who appears to be the owner. The seller may show the property, negotiate the price, sign an agreement and receive a deposit. Only later does the buyer discover that the land actually has several registered co-owners and that the person who signed the agreement owns only a fraction of the property.

The seller may insist that the other owners are relatives, that everyone has verbally agreed to the sale or that the remaining signatures will be obtained later. The foreign investor is then faced with a critical question: Can one co-owner legally sell the entire land without the consent of the other registered owners?

The answer depends on what exactly the seller agreed to sell. In ordinary co-ownership, an individual co-owner generally has the power to dispose of their own registered ownership share. However, one co-owner does not ordinarily have authority to transfer the independent ownership shares belonging to the other co-owners merely because they own part of the same land. A purported agreement concerning the entire property must therefore be distinguished from a transaction concerning only the seller’s own share.

For foreign investors, an additional issue is equally important: Turkish real-estate transactions are subject to formal requirements. A privately signed document stating that “the land has been sold” should not automatically be treated as equivalent to completed ownership transfer at the land registry.

First Question: Who Is Actually Registered as the Owner?

The starting point should always be the land registry.

Before determining whether a sale is valid, the buyer should establish:

• how many registered owners exist,
• the exact ownership share of each owner,
• whether the property is subject to ordinary co-ownership or another ownership structure,
• whether the seller has authority to represent anyone else, and
• whether mortgages, attachments, usufruct rights or other restrictions exist.

A seller’s statement that “this is my family’s land” is not sufficient.

The registered ownership structure must be verified.

What Does Co-Ownership Mean?

Under Turkish property law, several persons may own the same property in defined shares.

In ordinary co-ownership, each co-owner holds a legal percentage or fraction of the entire property.

For example, land may be registered as:

Owner A: 50 percent
Owner B: 25 percent
Owner C: 25 percent

Owner A’s 50 percent share does not ordinarily mean that Owner A independently owns a physically identified half of the parcel.

Instead, the share represents an undivided legal interest in the entire property.

Can One Co-Owner Sell Their Own Share?

Generally, yes.

A co-owner in ordinary co-ownership may generally dispose of their own ownership share, subject to applicable legal restrictions.

Therefore, if a person owns 25 percent of a parcel, that person may potentially transfer their 25 percent ownership interest without obtaining signatures from every other co-owner.

This is fundamentally different from selling the entire parcel.

Can One Co-Owner Sell the Entire Land?

Ordinarily, not by acting only in their individual capacity.

A co-owner who owns 25 percent cannot normally transfer the other 75 percent belonging to other registered owners simply by signing a contract stating that the entire property is being sold.

The other owners’ ownership rights remain legally relevant.

To transfer the entire property voluntarily, every ownership interest must be validly represented in the transaction.

Majority Ownership Does Not Create Authority Over Minority Shares

A foreign buyer should not assume that a majority owner can sell the entire parcel.

A person owning 70 percent of the land does not automatically have authority to transfer the remaining 30 percent belonging to another person.

Even a very small ownership share remains a legally protected property right.

The percentage owned by the seller and the authority to sell the entire property are separate questions.

What If the Seller Says the Other Owners Verbally Agreed?

Verbal approval should not be treated as a substitute for the legally required transfer process.

The buyer should determine whether the other owners will personally participate in the transaction or whether a representative has valid authority to act on their behalf.

Statements such as “my brothers agreed,” “my cousins know about the sale” or “everyone in the family has approved” can create serious risk if the actual owners later refuse to transfer their shares.

What If One Co-Owner Signs a Private Sale Agreement for the Entire Land?

This situation requires careful legal analysis.

The document may create contractual questions between the person who signed it and the buyer, but it does not mean that the signatory automatically transferred ownership interests belonging to people who did not participate in the transaction.

The agreement’s wording, legal form, subject matter and seller’s actual authority must be examined.

A foreign buyer should therefore avoid assuming that a signed paper automatically creates ownership of the entire parcel.

Real Estate Ownership Transfer Requires Formal Procedures

Turkish law imposes formal requirements on real-estate transactions.

Ownership of registered land is not transferred merely because the parties sign an ordinary private document and money changes hands.

The land-registry transfer process is therefore crucial.

A buyer should distinguish among:

1. negotiation documents,
2. preliminary agreements,
3. promises concerning future transfer, and
4. completed registered ownership transfer.

These are not legally identical.

A Deposit Does Not Automatically Make the Buyer the Owner

Foreign investors sometimes pay a substantial deposit after signing a document with one co-owner.

The buyer may believe that the property has effectively been purchased and that registration is merely administrative.

That assumption can be dangerous.

Payment of a deposit or even the entire agreed purchase price does not by itself mean that every ownership share has been legally transferred.

What If the Seller Promised to Obtain the Other Signatures Later?

This is a common risk in multi-owner land transactions.

The seller may promise:

“I will obtain the other signatures next week.”

“My family will transfer their shares later.”

“The other owners are abroad, but there will be no problem.”

The buyer should not structure a major investment around an assumption that future cooperation is guaranteed.

The other owners may change their minds, demand additional money or deny ever authorizing the first seller.

Can the Seller Act Under a Power of Attorney?

Potentially, yes.

One co-owner may be authorized to act on behalf of other owners through a legally sufficient power of attorney.

In that situation, the person is not acting merely because they are a co-owner; they are also acting as an authorized representative.

The scope and validity of the power of attorney should be verified carefully before payment or transfer.

Never Assume Family Relationship Creates Authority

Being a spouse, sibling, parent, child or other relative of a registered owner does not automatically provide authority to sell that person’s real estate.

Family relationships and legal representation are different concepts.

The buyer should verify formal authority rather than relying on family explanations.

What If All Co-Owners Signed the Agreement?

If every registered co-owner participates, the authority problem may be substantially reduced.

However, the transaction must still satisfy the legal formalities applicable to real-estate transfer.

A document signed by all owners should not automatically be confused with completed title registration.

The exact nature and form of the agreement still matter.

What If Only Some Co-Owners Sign?

The buyer must determine exactly what those sellers are legally undertaking to transfer.

If three of five co-owners validly transfer their individual shares, the buyer may become a co-owner with the two people who did not sell.

The buyer does not automatically acquire the entire parcel merely because most owners participated.

The Contract Should Identify Each Ownership Share

A properly structured multi-owner acquisition should clearly identify the ownership interest attributable to each seller.

For example:

Seller A transfers 30 percent.
Seller B transfers 20 percent.
Seller C transfers 10 percent.

This can help prevent later disputes over what each person actually agreed to sell.

What If the Contract Simply Says “The Entire Land”?

That wording can create significant problems where the signatory does not own the entire property.

The buyer should immediately compare the contract with the land-registry records.

If the seller’s registered share is smaller than the property described in the agreement, legal advice should be obtained before making additional payments.

Can the Buyer Force the Other Co-Owners to Complete the Sale?

Generally, the other co-owners do not become contractually bound merely because another owner signed an agreement on their behalf without authority.

Whether any claim can be made against the person who signed the agreement is a different issue.

The buyer should distinguish between:

a claim against the contracting seller and a right to obtain ownership from non-signing owners.

These are not the same.

What If the Seller Falsely Claimed to Be the Sole Owner?

This substantially increases the seriousness of the situation.

The buyer should preserve all advertisements, messages, contracts, payment records and representations concerning ownership.

The legal consequences will depend on the facts, including what the seller knew, what was represented and what money was obtained.

The matter may involve contractual remedies and, in appropriate circumstances, separate allegations requiring additional legal evaluation.

Obtain the Current Land Registry Information Before Paying

A foreign buyer should verify ownership before paying a large deposit.

The title investigation should identify the registered owners and their shares.

It should also reveal whether the property is affected by restrictions that could interfere with the planned transfer.

Due diligence performed after the money has already been paid may be too late to prevent the dispute.

What If the Seller Shows an Old Title Document?

An old document should not automatically be treated as proof of the current legal situation.

Ownership may have changed through sale, inheritance, court proceedings or another transaction.

Mortgages, attachments or other restrictions may also have been registered later.

The buyer should examine current records.

Inherited Land Creates Additional Risks

Many co-owned parcels originate from inheritance.

A seller may describe themselves as an heir and claim authority over the entire family property.

However, inheritance can produce complicated ownership structures involving multiple heirs.

The buyer must determine whether the land has been registered in individual shares or remains subject to a different ownership regime.

Ordinary Co-Ownership and Joint Ownership Must Be Distinguished

This distinction can materially affect the transaction.

Under ordinary co-ownership, owners generally have defined shares and can dispose of their own shares.

Joint ownership operates differently because the participants do not necessarily possess independently disposable shares in the same way.

An investor should therefore not assume that every property with multiple names on the ownership side can be purchased through separate individual share transactions.

What If the Property Is Still Held Through an Estate?

If the registered owner has died and inheritance procedures remain incomplete, the investor should proceed carefully.

One heir may not necessarily have authority to sell the entire property or even an independently registered fraction simply because that heir expects to receive part of the estate.

Inheritance documentation and the current land-registry position must be examined first.

Can One Co-Owner Sell a Specific Physical Part of the Land?

This is another frequent misunderstanding.

A co-owner may tell the buyer:

“My share is the northern half.”

“This corner belongs to me.”

“My family has always used this side.”

But an undivided ownership share does not automatically correspond to a separately registered physical section.

The cadastral and title structure must be checked.

A Private Usage Arrangement Is Not Necessarily Separate Ownership

Co-owners may have divided the practical use of the land among themselves for many years.

One family may use the eastern side while another uses the western side.

That arrangement does not necessarily mean that each side has become an independently registered parcel.

A foreign investor should distinguish practical possession from registered ownership.

Can the Buyer Build on the Seller’s “Part” After Purchasing the Share?

This can create major problems.

Purchasing an undivided share does not automatically give the investor unrestricted authority to develop a specific physical section.

Co-ownership rules, zoning law, building permits and the rights of other co-owners may all become relevant.

The development plan should be reviewed before the share is acquired.

Statutory Pre-Emption Rights Must Be Considered

Even where one co-owner validly sells only their own share, another issue may arise.

When a co-owner sells a share to a third party, the other co-owners may have a statutory pre-emption right under the conditions established by Turkish law.

This can create a significant risk for a foreign investor entering an existing co-ownership structure.

The First Share Purchase Can Be Particularly Sensitive

Before the first acquisition, the foreign investor is generally an outside buyer rather than an existing co-owner.

A sale by one co-owner to that outside investor may therefore raise statutory pre-emption issues.

The acquisition strategy should address this risk before closing.

The Current 2026 Pre-Emption Periods Should Be Checked

Foreign investors should be particularly careful with older internet materials concerning statutory pre-emption.

Following legislative changes effective at the end of 2025, the current framework provides for a three-month period connected with proper notification of the sale and an ultimate one-year period from the sale.

A 2026 acquisition should therefore be evaluated under the current rules.

Notification of the Sale Can Become Important

The statutory framework provides for notification of a qualifying share sale to the other co-owners through the prescribed process.

The buyer should not treat this as an unimportant administrative step.

It can affect the timing and management of pre-emption exposure.

What If Another Co-Owner Exercises Pre-Emption?

A foreign investor who purchases one owner’s share may face legal proceedings from another co-owner seeking to exercise statutory pre-emption.

The buyer should preserve the purchase documents and payment evidence and obtain legal assistance promptly.

Pre-emption risk should ideally be addressed before the transaction rather than after litigation begins.

Can the Other Co-Owners Waive Pre-Emption?

Turkish law recognizes waiver mechanisms, but formal requirements apply.

A general waiver and a waiver concerning a particular transaction are not necessarily subject to identical formalities.

Where the investor is purchasing a substantial share, the waiver structure should be legally reviewed before closing.

What If the Buyer Has Already Paid the Full Price?

Payment does not solve an authority problem.

If the person who received the money lacked authority to transfer the other owners’ shares, the buyer may need to consider claims against the contracting seller.

The existence and scope of those claims depend on the agreement, representations, payment evidence and surrounding circumstances.

Bank Transfer Descriptions Can Become Important

If the buyer pays money, the transfer record should clearly identify the purpose of payment.

A vague transfer with no description may later create arguments over whether the money represented a deposit, loan, advance or purchase price.

The contract and payment records should correspond with each other.

Avoid Large Cash Payments

Cash creates substantial evidentiary risk.

If a dispute later arises, the seller may deny receiving the amount claimed by the buyer.

Bank transfers and documented payment mechanisms generally provide a clearer evidentiary trail.

What If a Real Estate Agent Arranged the Transaction?

An agent’s involvement does not replace title verification.

The investor should still determine who owns the land and whether the person signing the transaction has authority to sell the relevant ownership interests.

Statements made by an intermediary should be preserved if they influenced the investment decision.

Do Not Rely Solely on a Property Advertisement

An advertisement may describe the property as “single-owner land” even though the registry shows multiple owners.

Save the advertisement, but independently verify the title.

If ownership representations later prove false, the advertisement may become evidence.

What If One Co-Owner Receives the Deposit for Everyone?

This should be treated cautiously.

The buyer should determine whether that person has authority to receive money on behalf of the other owners.

Otherwise, a payment made to one person may not prove that the other owners received or accepted their respective purchase prices.

Payment mechanics should be defined before funds are transferred.

Separate Payments May Provide Greater Clarity

In a transaction involving multiple sellers, payments can be structured so that the amount attributable to each ownership share is identifiable.

This can reduce disputes about which seller was paid and what the payment represented.

The transaction structure should coordinate payment with title registration.

What If the Non-Signing Owners Later Agree?

The transaction may potentially be restructured so that the remaining owners participate through the legally required process.

However, the buyer should not assume that an earlier defective or incomplete transaction automatically becomes a completed transfer merely because everyone later expresses informal approval.

The subsequent transaction should be completed correctly.

What If the Non-Signing Owners Refuse?

The buyer should immediately review the contractual position against the seller who signed.

The buyer may need to consider recovery of money, contractual liability or other remedies depending on the circumstances.

Continuing to make additional payments after learning that the remaining owners refuse to participate can substantially increase the financial risk.

Can the Buyer Acquire Only the Signing Owner’s Share Instead?

Potentially, if the parties agree and the applicable formal requirements are satisfied.

However, this changes the investment fundamentally.

The foreign buyer may become a co-owner with people who never intended to sell.

Before accepting this outcome, the investor should examine whether long-term co-ownership is commercially acceptable.

Becoming a Co-Owner Can Create New Risks

A foreign investor who expected to buy an entire parcel may instead acquire only 20 or 30 percent.

The investor then shares ownership with the remaining owners.

Decisions concerning management, use, development and eventual termination of co-ownership can become contentious.

The buyer should not accept partial ownership merely because money has already been paid.

Can the Buyer Later Acquire the Remaining Shares?

Yes, if the remaining owners voluntarily agree to sell and the transactions are legally completed.

The investor should negotiate each remaining share separately or organize a coordinated closing.

The acquisition sequence and pre-emption implications should be reviewed carefully.

What If the Remaining Owners Demand Much More Money?

This is a common commercial problem.

Once the foreign investor has purchased one share, the other owners may understand that complete ownership is strategically important.

They may therefore demand substantially higher prices.

This risk is one reason why negotiations with all owners should ideally occur before the first acquisition.

Can Co-Ownership Eventually Be Terminated Through Court Proceedings?

Potentially.

Subject to statutory exceptions, a co-owner may seek termination of co-ownership.

Depending on the property and circumstances, termination may occur through physical division or sale.

However, a foreign investor should not treat this as a guaranteed method of acquiring the remaining shares.

A Partition Case Does Not Guarantee Full Ownership

Where physical division is impossible and the property is sold, the investor may potentially seek to purchase it through the applicable sale process.

Other buyers may also participate depending on the circumstances.

The investor therefore faces price and competition risk.

Buying one share with the assumption that a court will later automatically award the entire property to the investor is unsafe.

What If the Buyer Wants to Cancel the Deal?

The available remedies depend on what was signed, whether the required formalities were satisfied, what the seller represented and how much money was paid.

The buyer should preserve the complete evidence file.

This includes the agreement, advertisement, messages, bank transfers, title information and any representations concerning the other owners’ consent.

What If the Seller Refuses to Return the Deposit?

The legal basis for recovery should be examined.

The buyer may have claims depending on the validity and content of the transaction and the circumstances under which payment was made.

Formal demand, mediation, enforcement or litigation may become relevant depending on the claim.

Could False Ownership Representations Have Criminal Consequences?

Some disputes are purely civil.

However, where money was obtained through deliberate false representations concerning ownership or authority, the facts may require separate criminal-law evaluation.

The existence of an unsuccessful property transaction alone does not automatically establish a criminal offense.

Intent, representations and evidence must be examined carefully.

Foreign Ownership Restrictions Must Still Be Checked

Even if every co-owner agrees to sell, the foreign investor must be legally eligible to acquire the relevant property.

Foreign real-estate acquisition rules operate independently from the co-owner consent issue.

The buyer’s nationality, property characteristics, location, statutory acquisition limits and other restrictions may need to be reviewed.

Agricultural Land Requires Additional Due Diligence

If the property is agricultural land, special rules may affect acquisition, division and use.

A foreign investor should therefore examine the official classification of the parcel.

An agreement signed by all co-owners does not override regulatory restrictions affecting the land itself.

Zoning Status Must Be Verified Separately

Ownership and development rights are different questions.

A buyer may validly acquire land but later discover that the intended project cannot be constructed.

Zoning status, permitted use, access and development restrictions should therefore be examined before completing the acquisition.

Check Encumbrances on Every Share

Different ownership shares may be affected by different restrictions.

One seller’s share may be free of encumbrances while another is subject to an attachment or mortgage.

The buyer should investigate each share rather than examining only the parcel generally.

Do Not Sign Before Building an Ownership Table

For a multi-owner property, create a simple ownership table before negotiating the final transaction.

Identify every owner, registered share, willingness to sell, requested price, encumbrances and representation status.

If the total proposed seller shares do not equal 100 percent, the investor should know immediately that complete ownership will not be acquired.

Coordinate Signing, Payment and Registration

The safest transaction structure should avoid a long gap between paying substantial money and receiving the intended registered ownership.

Where multiple sellers are involved, signing, payment and registration should be coordinated as closely as legally and practically possible.

Contingencies should address what happens if one owner fails to complete the transfer.

2026 Practical Legal Strategy

When one co-owner offers to sell an entire parcel, a foreign investor should stop the transaction until the exact land-registry ownership structure has been verified. The first question is not whether the proposed price is attractive; it is whether the seller actually owns or is legally authorized to transfer everything being sold.

If the seller owns only a defined share, the investor should distinguish between acquiring that share and acquiring the entire property. A co-owner may generally dispose of their own share in ordinary co-ownership, but they cannot ordinarily transfer other owners’ independent shares without proper authority.

The investor should then examine the formal validity of the transaction. An ordinary privately signed document and payment of a deposit should not be confused with completed real-estate ownership transfer.

Where the investor is willing to acquire only the seller’s share, statutory pre-emption exposure should also be analyzed before closing. Under the current 2026 framework, the three-month notification-based period and the one-year ultimate period are particularly important.

If money has already been paid for an entire parcel and the remaining owners refuse to sell, Lawyer Fırat Fesih Kaya can examine the agreement, land-registry records, seller’s authority, payment evidence and ownership representations to determine whether the buyer should pursue completion, recovery of the purchase funds, compensation or another legal remedy.

Frequently Asked Questions

Can one co-owner sell land without permission from the other co-owners?

A co-owner in ordinary co-ownership may generally dispose of their own share. This does not ordinarily mean they can transfer ownership shares belonging to the other co-owners.

Can a 60 percent owner sell 100 percent of the property?

Not merely because they own the majority. The remaining ownership interests belong to their respective owners unless the seller has legally sufficient authority to represent them.

Is a private land sale agreement enough to transfer ownership?

A privately signed agreement should not automatically be treated as completed real-estate ownership transfer. Turkish real-estate transfers are subject to formal requirements and registration rules.

What if the other owners verbally agreed to the sale?

Verbal assurances should not replace legally sufficient participation or representation. Their authority and involvement should be verified before payment.

Can one owner sign for the others under a power of attorney?

Potentially, if the person has a legally valid and sufficiently broad power of attorney covering the relevant transaction.

What happens if I already paid a deposit for the entire land?

The agreement, payment records, seller’s ownership share and representations should be examined immediately. Depending on the circumstances, recovery or other contractual remedies may need to be considered.

Can I simply accept the signing owner’s share?

Potentially, if the parties agree and the transfer is legally completed. However, you would then become a co-owner with the remaining owners rather than sole owner.

Can the remaining co-owners exercise pre-emption if I buy one share?

Potentially, yes, where a co-owner sells a share to an outside third party and the statutory requirements for pre-emption are satisfied.

Can I force the non-signing owners to sell because I signed an agreement with another owner?

Ordinarily, non-signing owners are not bound merely because another co-owner entered into an agreement without authority to represent them.

What should a foreign investor do before signing a co-owned land purchase?

Verify the current land registry, identify every owner and ownership percentage, confirm the seller’s authority, investigate encumbrances and foreign-acquisition restrictions, determine whether the transaction concerns one share or the entire parcel and analyze pre-emption risk before paying any substantial amount.

Legal Support for Foreign Investors in Co-Owned Land Transactions

Foreign investors can suffer substantial losses when one co-owner signs an agreement to sell an entire parcel even though other registered owners have not participated in the transaction. The dispute may involve seller authority, invalid or incomplete transaction documents, deposits, ownership-share transfers, statutory pre-emption, recovery of purchase funds and subsequent litigation.

Fırat Fesih Kaya Law Office assists foreign investors with co-owned property acquisitions, title due diligence, ownership-share disputes, seller-authority issues, statutory pre-emption claims, recovery of purchase funds and real-estate litigation. Lawyer Fırat Fesih Kaya can examine the land-registry structure, sale documents, powers of attorney and payment evidence before or after the transaction to determine whether the proposed transfer can legally achieve the investor’s intended ownership position.

Phone: +90 312 434 22 22

WhatsApp: +90 532 769 22 22

Email: info@firatfesihkaya.av.tr