Contract Signed by an Unauthorized Company Representative in Turkey: Is It Binding? (2026 Updated Guide)

A company contract in Turkey was signed by a person without sufficient authority. Learn when the company may be bound, how signature authority is examined, the effect of ratification, and what foreign companies should do in a representation dispute.

A contract may appear completely valid until one party discovers that the person who signed it did not have authority to bind the company. This problem is particularly important for foreign investors, international suppliers, distributors, lenders and companies entering substantial commercial transactions in Turkey. A title such as general manager, country manager, sales director or chief executive does not by itself answer whether the individual possessed the necessary legal authority for the particular transaction. The analysis can require examination of the company’s representation structure, commercial registry records, articles of association, board or shareholders’ decisions, signature arrangements, powers of attorney and the conduct of the company before and after execution. An unauthorized signature does not produce the same result in every case. Whether the company is bound may depend on the type of company, source and scope of the representative’s authority, applicable restrictions, the counterparty’s knowledge and whether the transaction was subsequently approved or adopted.

Why Does Signature Authority Matter in Turkish Commercial Transactions?

Companies act through natural persons. Determining which individuals can create legally binding obligations on behalf of a company is therefore fundamental to commercial transactions. A contract worth millions may become disputed if the signatory lacked authority, exceeded a monetary limitation or signed alone when joint representation was required.

Foreign counterparties should consequently treat authority verification as part of transaction due diligence rather than a formality performed after a dispute begins.

A Senior Job Title Does Not Automatically Establish Authority

One of the most common mistakes is assuming that an impressive corporate title necessarily gives the holder unlimited representation authority.

An individual may manage significant parts of the business internally while lacking authority to execute a particular agreement externally. Conversely, an individual may possess formally granted representation authority even though that person’s operational role appears relatively limited.

The actual legal source of authority should therefore be identified.

What Documents Should Be Checked?

Depending on the company and transaction, relevant documents can include commercial registry information, articles of association, resolutions concerning representation, signature arrangements, powers of attorney and transaction-specific approvals.

The documents should be reviewed as they existed on the date the contract was signed. A later change in management does not determine whether the representative was authorized at the earlier date.

Commercial Registry Records Can Be Critical

For Turkish companies, commercial registry information may provide important evidence concerning authorized representatives and the manner in which representation is exercised.

The counterparty should examine whether representation was individual or joint and whether the person signing the agreement was authorized during the relevant period.

Individual and Joint Representation Must Be Distinguished

A company may authorize one person to represent it individually or require two or more authorized representatives to act together.

If the registered arrangement requires joint signatures but only one person signs, a significant authority dispute may arise.

For high-value agreements, the signature configuration should therefore be checked before execution.

What If Two Signatures Were Required but Only One Was Obtained?

The answer depends on the company’s legally effective representation structure and the circumstances of the transaction. The counterparty should not assume that one signature is sufficient merely because the individual regularly negotiated on behalf of the company.

The authority documents should be examined before relying on the contract.

Powers of Attorney Must Be Read Carefully

Where the signatory acts under a power of attorney, the document should be reviewed for scope, duration and any transaction-specific limitations.

Authority to negotiate contracts may not necessarily be identical to authority to execute every type of agreement, guarantee, settlement or asset disposition.

Transaction Type Can Matter

Certain transactions may require particular corporate approvals or formalities beyond ordinary representation authority. The larger and more unusual the transaction, the more important it becomes to investigate both representation and internal corporate authorization.

This is especially relevant in acquisitions, financing arrangements, guarantees, significant asset transactions and long-term commercial commitments.

Internal Approval and External Representation Are Different Questions

A company may internally require board approval before management enters a particular transaction. Whether breach of that internal rule affects the counterparty requires a separate legal analysis.

Companies should therefore distinguish between internal corporate authority and external representation authority rather than treating them as identical.

Can Internal Restrictions Be Used Against the Counterparty?

Not every internal limitation necessarily produces the same external effect. Whether a restriction can be asserted against a third party depends on its legal nature, how representation was structured and other circumstances relevant under Turkish company and obligations law.

A company cannot safely assume that an undisclosed internal approval policy automatically defeats every agreement signed contrary to that policy.

What If the Representative Exceeded a Monetary Limit?

Suppose an employee was internally permitted to sign contracts up to a specified amount but signed a substantially larger agreement. The effect depends on the legal status of that limitation and whether it was merely an internal instruction or part of an enforceable representation structure.

This is why counterparties should request authority evidence for significant transactions rather than relying on internal emails or verbal assurances.

Unauthorized Representation Must Be Analyzed Separately

Where an individual acts in another person’s name without sufficient authority, Turkish obligations-law principles concerning unauthorized representation may become relevant.

A central question becomes whether the represented company later approves the transaction.

Can the Company Ratify the Contract Later?

Potentially. Subsequent ratification can be extremely important where authority was missing or disputed when the agreement was executed.

Ratification may transform the legal position of a transaction originally entered into without sufficient authority.

Ratification Should Be Documented

If the parties discover an authority defect while they still wish to continue the transaction, obtaining clear corporate approval can prevent future litigation.

For substantial contracts, relying on vague conduct when formal written confirmation can be obtained creates unnecessary risk.

Can Conduct Amount to Approval?

Company conduct after signature can become important. For example, questions may arise where the company accepts contractual performance, issues invoices, makes payments, delivers goods, uses services or otherwise acts consistently with the transaction.

However, whether particular conduct legally establishes approval is fact-specific. Parties should not assume that every act of performance automatically resolves an authority defect.

What If the Company Performs the Contract for Months and Later Denies It?

This can create a substantially different dispute from a case in which the company immediately rejected the transaction.

The company’s knowledge, performance, payments, correspondence and acceptance of benefits may become important evidence.

All communications and accounting records should therefore be preserved.

Counterparty Good Faith Can Become Important

Where the counterparty genuinely believed that the signatory was authorized, the circumstances creating that belief may matter.

Relevant evidence can include prior transactions, official company communications, negotiations involving senior management and documents supplied before execution.

Nevertheless, good faith should not replace proper authority due diligence in major transactions.

Previous Contracts With the Same Representative

If the same individual previously signed agreements that the company performed without objection, those transactions may become relevant evidence concerning the commercial relationship.

They do not necessarily resolve the legal issue automatically, but they can help explain why the counterparty relied on the representative’s authority.

Company Email and Letterhead Are Not Enough by Themselves

An individual using a corporate email address, business card or company letterhead may clearly work for the company, but employment does not necessarily establish unlimited authority to bind it.

Formal authority should still be checked where the transaction is significant.

Company Stamp Does Not Automatically Cure Lack of Authority

Parties sometimes assume that a company stamp makes an agreement binding regardless of who signed it.

The real issue remains whether the person acting for the company possessed the necessary representation authority or whether the transaction was subsequently validly adopted.

Foreign Companies Should Verify Turkish Counterparties Before Signing

International companies entering Turkish commercial transactions should perform authority checks before execution, especially for high-value contracts.

The review should identify the legal entity, authorized representatives, representation method and any relevant transaction-specific approvals.

Turkish Companies Should Also Verify Foreign Signatories

The same risk exists in the opposite direction. A Turkish company contracting with a foreign corporation should verify the foreign signatory’s authority under the applicable corporate framework.

International agreements should not assume that the word “director” has identical legal consequences in every jurisdiction.

What Happens If the Company Refuses to Ratify?

If the company maintains that the person lacked authority and refuses to approve the transaction, the legal consequences should be examined under unauthorized-representation principles and the particular facts.

Potential claims involving the unauthorized representative may also need to be evaluated.

Can the Unauthorized Signatory Become Personally Liable?

Potential personal liability can arise under the applicable unauthorized-representation framework depending on the circumstances.

The analysis should consider what the signatory represented about their authority, whether the counterparty knew about the deficiency and what loss resulted.

Fraud Is a Separate Issue

A person deliberately fabricating authority documents or falsely presenting themselves as an authorized company representative can create issues extending beyond an ordinary contractual authority dispute.

Potential civil, corporate and criminal consequences should be analyzed separately where deliberate deception or falsification is suspected.

Fake Signature Circulars or Powers of Attorney Require Immediate Action

If authority documents themselves appear falsified, preserve the original documents, electronic communications and metadata where available.

Do not allow a straightforward contractual dispute to obscure potential document-fraud issues.

What If the Signature Itself Is Denied?

A dispute concerning whether the person possessed authority differs from a dispute concerning whether that person actually signed the document.

Where signature authenticity is contested, handwriting, electronic-signature or other evidentiary examination may become necessary.

Electronic Contracts Can Create the Same Authority Problem

Electronic execution does not eliminate representation issues. A company employee can electronically approve or sign an agreement without possessing the necessary corporate authority.

Electronic records should therefore identify both the signatory and the basis of authority.

Board Resolutions Should Be Preserved

Where a transaction required or received board approval, preserve the relevant corporate resolution and documents demonstrating implementation.

The timing of approval can become particularly important if authority is later disputed.

Due Diligence Is Essential in M&A Transactions

Unauthorized-signature issues can become especially serious during company acquisitions. A buyer may discover guarantees, leases, supplier contracts or financing arrangements allegedly executed by former managers without sufficient authority.

Legal due diligence should therefore review material agreements against historical representation records.

Unauthorized Guarantees Require Special Attention

Company guarantees and security arrangements can expose the company to substantial liabilities. Where authority is questioned, review the transaction, corporate approvals and representation structure carefully rather than assuming that an executive’s signature conclusively binds the company.

Distribution and Agency Contracts Are Common Risk Areas

Foreign companies frequently negotiate through local executives over extended periods. Because those executives may appear to control the commercial relationship, the foreign counterparty can mistakenly assume they possess authority to execute long-term distribution or agency arrangements.

Authority should be verified immediately before signing.

Share Purchase Agreements Require Enhanced Verification

In a share acquisition, authority should be verified for every corporate party executing the transaction and related documents.

Closing should not proceed merely because the individuals negotiating the transaction appear to be senior decision-makers.

What Should a Foreign Company Do After Discovering the Problem?

First, preserve the signed agreement and all authority documents. Second, obtain historical registry and corporate records relevant to the execution date. Third, review the negotiations and subsequent performance. Fourth, determine whether the company ratified or adopted the transaction. Fifth, assess claims against the company and potentially against the purported representative.

Avoid terminating performance impulsively before understanding the legal consequences.

Do Not Accept a Simple Statement That “The Signatory Was Unauthorized”

A company attempting to escape an unfavorable contract may state that the employee lacked authority.

The counterparty should request the legal and corporate basis for that position and independently review the relevant records.

Do Not Ignore a Genuine Authority Defect Either

The opposite mistake is equally dangerous. If the representation records clearly indicate a problem, continuing to perform without addressing it can increase commercial losses.

Seek confirmation or ratification where appropriate.

Evidence to Preserve

Important evidence can include the signed agreement, commercial registry records, historical representation documents, board decisions, powers of attorney, emails, negotiation records, invoices, payments, delivery documents and evidence of benefits received by the company.

A chronological file is particularly useful.

Can an Interim Injunction Be Requested?

Where an authority dispute threatens assets, shares, payments or other rights and the legal requirements are satisfied, interim judicial protection may need to be considered.

The appropriate remedy depends on the contract and underlying dispute.

Jurisdiction and Arbitration Clauses Still Require Analysis

A disputed contract may contain Turkish court jurisdiction, foreign jurisdiction or arbitration provisions. If the entire contract is challenged because of alleged lack of authority, the effect on the dispute-resolution clause requires careful legal analysis.

Do not assume automatically that an authority objection eliminates every contractual provision.

Governing Law Is Critical in International Contracts

Where the contract contains a foreign governing-law clause, questions concerning corporate representation and contractual consequences may involve conflict-of-laws analysis.

The applicable law should therefore be determined before conclusions are drawn from Turkish corporate records alone.

Preventing Unauthorized Signature Disputes

Before signing a substantial contract with a Turkish company, identify the exact legal entity, obtain current representation information, confirm whether signatures must be joint, review any power of attorney, obtain transaction-specific corporate approval where appropriate and preserve the authority documents with the executed contract.

For long-term relationships, repeat the check when representation changes.

2026 Practical Assessment

Digital contracting, international corporate structures and increasingly complex delegation systems make authority verification more important, not less. Companies often negotiate through regional managers, procurement teams and commercial directors located in different countries. The individual leading negotiations may not be the individual legally authorized to bind the company.

For foreign investors and international companies doing business in Turkey, signature authority should therefore form part of standard transaction closing procedures.

Frequently Asked Questions

Is a contract signed by an unauthorized representative automatically binding on the company?

Not necessarily. The source and scope of authority, representation structure, subsequent ratification and surrounding circumstances must be examined.

Does a general manager automatically have authority to sign every contract?

No such assumption should be made. The actual representation authority and applicable corporate records should be reviewed.

What if two company representatives were required to sign but only one signed?

This can create a significant authority issue. The legally effective representation arrangement at the execution date should be examined.

Can the company approve the contract afterward?

Potentially. Subsequent ratification can be highly important in an unauthorized-representation case.

Can accepting contractual benefits amount to ratification?

Company conduct may become relevant, but whether particular conduct legally constitutes approval depends on the circumstances.

Is a company stamp enough to prove authority?

Not by itself. The authority of the person acting for the company remains a central issue.

Can the unauthorized representative become personally liable?

Potentially, depending on the applicable rules and circumstances surrounding the representation and the counterparty’s knowledge.

What if the authority document was forged?

Potential civil and criminal issues may arise. The documents and electronic evidence should be preserved immediately.

Should foreign companies check commercial registry records before signing?

For significant transactions, authority verification should be an important part of legal due diligence.

What should a company do when authority is disputed after signing?

Preserve the contract and all communications, obtain the representation records applicable on the signing date, determine whether the company subsequently approved or performed the agreement, and evaluate claims against both the company and the purported representative before taking irreversible contractual action.

Client-Focused Legal Support for Corporate Authority and Contract Disputes

Fırat Fesih Kaya Law Office assists foreign investors, international companies and shareholders in disputes involving unauthorized signatures, company representation, powers of attorney, board authority, disputed contracts, corporate guarantees and subsequent ratification. Lawyer Fırat Fesih Kaya provides legal assistance in examining corporate authority records, determining whether contracts bind Turkish companies, seeking urgent judicial protection where necessary and pursuing commercial litigation or arbitration arising from disputed representation.

Phone: +90 312 434 22 22

Mobile / WhatsApp: +90 532 769 22 22

Email: info@firatfesihkaya.av.tr

Address: Mevlana Boulevard No:221, Yıldırım Tower, Office No:148, 06520 Balgat, Çankaya, Ankara, Turkey