Foreign Partner Diverts Customers and Company Income in Turkey: Criminal or Commercial Dispute? (2026 Updated Guide)

A foreign partner diverts customers, payments or company income in Turkey. Learn when the dispute may involve criminal allegations, commercial litigation, director liability, accounting evidence and emergency measures.

A shareholder or business partner diverting customers and company income can cause immediate damage to a company operating in Turkey. The situation becomes particularly complicated for foreign investors when another partner begins directing customers to a separate company, instructing clients to make payments to a personal bank account, collecting company receivables outside the accounting system, transferring business opportunities to a related company or using confidential customer information for a competing enterprise. Whether this conduct constitutes a criminal matter, a commercial dispute, or both depends on the precise acts, the partner’s corporate position, authority, ownership of the funds and available evidence. A shareholder dispute should not automatically be converted into a criminal complaint merely because substantial money is involved. Conversely, describing deliberate diversion of corporate assets as merely a “commercial disagreement” may overlook conduct capable of producing separate criminal-law consequences.

When Does Customer Diversion Become a Serious Legal Problem?

Ordinary competition between former business partners is different from a current shareholder, director or manager using company resources and authority to transfer existing business to themselves or another entity.

Warning signs may include customers suddenly being instructed to pay another bank account, invoices being issued through a related company, company employees being told to redirect orders, business opportunities disappearing from company systems, corporate email accounts being used for competing transactions or unexplained decreases in company revenue despite continuing customer activity.

Is Customer Diversion Automatically a Crime?

No. The legal characterization depends on the conduct.

A disagreement concerning management strategy, customer allocation, profit distribution or contractual authority may primarily constitute a commercial or corporate dispute. Criminal liability requires the elements of a specific criminal offense to be established.

The factual conduct should therefore be analyzed before deciding which legal route to pursue.

Commercial and Criminal Proceedings Can Exist at the Same Time

The same factual events can potentially create different types of legal responsibility.

For example, conduct may generate corporate-law claims concerning breach of management duties while separate acts involving company money, documents or deception may require criminal-law analysis.

Each route has different purposes and evidentiary requirements.

First Determine the Partner’s Legal Position

Is the person merely a shareholder? Are they also a director, manager, board member, authorized signatory or employee?

This distinction can significantly affect their authority over customers, company accounts and commercial decisions.

A shareholder does not necessarily possess unlimited authority over corporate assets simply because they own part of the company.

Who Owns the Diverted Income?

This is often one of the most important questions.

If the payment legally belongs to the company but was redirected into another person’s account, the dispute is materially different from a disagreement over income that was never legally owed to the company.

Review the customer contract, purchase order, invoice and accounting records.

Payments to a Partner’s Personal Account Require Immediate Investigation

If customers have been instructed to send company receivables directly to a shareholder’s personal account, identify every transaction.

Obtain the payment date, customer, amount, invoice, bank account and communication instructing the customer to change payment details.

Payments to a Related Company Can Be More Difficult to Detect

A partner may establish or use another company rather than collect payments personally.

Compare shareholders, managers, addresses, employees, websites, telephone numbers and bank-payment instructions of the two businesses.

Follow the Customer Relationship

Determine how each diverted customer originally entered the business.

Relevant evidence can include contracts, quotations, customer relationship management records, emails, previous invoices and sales history.

Preserve Company Emails Immediately

Corporate email accounts can contain important evidence concerning customer diversion.

Where legally permissible, preserve relevant corporate communications before accounts are deleted or access rights are changed.

Evidence collection should respect applicable privacy and procedural requirements.

WhatsApp and Other Messages May Become Evidence

Messages can help establish instructions to employees or customers, but authenticity and the manner in which communications were obtained can become important.

Preserve complete conversations and contextual information rather than relying solely on isolated screenshots.

Bank Records Can Be Central

If company income was diverted, financial records may reveal the path of the funds.

Prepare a transaction matrix connecting customer, invoice, expected company account, actual recipient account and amount.

Accounting Records Should Be Secured

Preserve ledgers, invoices, e-invoices, customer balances, cash records and bank reconciliations.

If accounting access is controlled by the disputed partner, obtaining and preserving records can become urgent.

Check Whether Invoices Were Cancelled or Reissued

A partner diverting revenue may cancel company invoices and arrange for another entity to invoice the customer.

Compare accounting records with customer documents and payment information.

Employees Can Be Important Witnesses

Sales personnel, accountants and managers may know whether they were instructed to redirect customers.

Identify who received instructions, when they received them and whether written communications exist.

Customers Can Also Provide Evidence

Customers may possess emails, quotations, payment instructions and invoices showing how the transaction moved from the original company to another recipient.

Contact with customers should be handled carefully to avoid unnecessarily damaging continuing commercial relationships.

Review the Articles of Association and Shareholders’ Agreement

The corporate documents may contain provisions concerning management authority, competition, confidentiality, reserved matters and related-party transactions.

These documents can become central to the commercial side of the dispute.

Review Non-Competition Obligations

Whether a partner can compete with the company depends on their role and the applicable corporate and contractual framework.

Do not assume that every shareholder is automatically subject to exactly the same non-compete obligations.

Confidential Customer Information Can Create Additional Claims

Customer databases, pricing structures, supplier information and commercial strategies may constitute valuable company information.

Unauthorized use should be documented separately from the simple fact that a customer moved to another business.

Director or Manager Liability May Arise

Where the partner also serves as a director or manager, the conduct should be examined under the duties attached to that corporate position.

Using managerial authority for personal benefit at the company’s expense can raise issues beyond an ordinary shareholder disagreement.

Related-Party Transactions Should Be Investigated

Review whether the disputed partner caused the company to transfer goods, services, employees or opportunities to another entity under their control.

The commercial terms of those transactions should be examined.

Look for Below-Market Transactions

A partner may divert value without directly taking cash—for example, by transferring company goods or opportunities to a related entity at an artificially low price.

Compare market value, internal approvals and commercial justification.

Criminal Allegations Require Offense-Specific Analysis

Potential criminal issues depend on what actually occurred. The analysis may involve allegations concerning misuse of entrusted assets, fraudulent conduct, document-related offenses or other offenses depending on the evidence.

The existence of a shareholder dispute alone does not establish criminal liability.

Breach of Contract Is Not Automatically Fraud

A commercial promise that later goes unfulfilled should not automatically be characterized as criminal fraud.

Criminal analysis generally requires facts going beyond ordinary contractual non-performance.

Intent Can Be Critical

The chronology may help distinguish a business disagreement from deliberate diversion.

Evidence showing secret instructions, concealed accounts, false documents or coordinated transfer of customers may be particularly relevant to understanding intent.

Avoid Using Criminal Complaints Solely as Commercial Pressure

A criminal complaint should be based on facts supporting a genuine allegation of criminal conduct.

Using criminal proceedings simply to obtain leverage in a shareholder negotiation can create strategic and legal problems.

Commercial Litigation May Be Necessary

The company or affected shareholder may need to consider commercial claims seeking compensation, corporate remedies or other relief depending on the structure of the dispute.

The appropriate claimant should be identified carefully because losses suffered by the company and losses suffered personally by a shareholder are not necessarily the same.

Company Loss and Shareholder Loss Must Be Distinguished

If TRY 10 million belonging to the company is diverted, the primary financial loss may belong to the company.

A shareholder cannot automatically treat the entire corporate loss as their personal claim merely because they own shares.

Emergency Interim Measures May Be Critical

If diversion is continuing, waiting for final judgment can allow additional assets and customers to disappear.

Depending on the facts and legal requirements, interim judicial measures may need to be considered urgently.

Preserve Evidence Before Confronting the Partner

Immediate confrontation can result in deletion of emails, accounting information or other evidence.

The company should first identify legally accessible evidence and preserve it appropriately.

Review Banking Authority

Determine who can operate the company’s bank accounts and whether single-signature authority exists.

Where there is an immediate risk of unauthorized transactions, corporate and banking authority should be reviewed urgently through lawful procedures.

Review Company Representation Powers

Check the trade registry and internal corporate resolutions to determine who currently has authority to bind the company.

Internal disagreements do not automatically remove registered representation authority.

Unauthorized Company Commitments Should Be Identified

Determine whether the disputed partner has signed contracts, issued guarantees, transferred assets or incurred liabilities.

The company may face third-party consequences even while the internal shareholder dispute continues.

Consider a Forensic Accounting Review

Where substantial revenue has disappeared over months or years, ordinary accounting review may not be sufficient.

A transaction-level forensic analysis can identify diverted invoices, unusual counterparties, related-party transfers and unexplained bank movements.

Create a Customer Diversion Matrix

For every affected customer, record the original company relationship, diverted transaction, date, amount, recipient, communication used to redirect the customer and supporting evidence.

This can transform a vague accusation into a documented claim.

Calculate the Loss Carefully

Do not simply multiply diverted turnover and call the entire amount “damage.”

Revenue, profit, expenses, receivables and lost future business are different concepts. Each category of claimed loss should be supported separately.

Lost Profit Claims Require Evidence

Claims based on future customer revenue can be more difficult than claims involving money already owed to the company.

Historical margins, recurring orders, existing contracts and customer purchasing patterns may become important.

What If the Partner Says the Customers Belong to Them Personally?

Examine the contracts and history.

A personal relationship with a customer does not necessarily mean the resulting corporate contract or receivable belongs personally to the shareholder.

What If the Customer Voluntarily Leaves?

A customer generally cannot be treated as company property.

The legal issue is not simply that a customer chose another supplier. The important questions concern how the customer was diverted, whether company resources or confidential information were misused and whether existing contractual rights were interfered with.

Foreign Investors Should Secure Corporate Records

Foreign shareholders sometimes lack direct access to accounting systems, banking information or physical corporate records in Turkey.

Access rights should be evaluated promptly rather than relying exclusively on information supplied by the opposing partner.

Powers of Attorney Should Be Reviewed

If the disputed partner or another individual possesses a broad power of attorney, determine what authority remains active and whether lawful steps are required to prevent further unauthorized use.

Digital Access Should Be Reviewed

Corporate email, cloud storage, accounting software, customer databases and banking systems should be secured through legitimate corporate procedures.

Preserve logs before changing access where those logs may later become evidence.

What If Money Has Already Been Transferred Abroad?

Trace the transactions as far as possible and preserve banking evidence.

Cross-border movement of funds can make recovery more complicated and may require coordinated proceedings depending on the destination and legal basis.

Can the Partner’s Assets Be Frozen?

Potential precautionary measures depend on the type of claim, evidence, urgency and statutory conditions.

Asset freezing should not be described as automatic merely because a shareholder is accused of misconduct.

Criminal Seizure and Commercial Interim Measures Are Different

A criminal investigation may involve protective measures governed by criminal procedure, while a commercial claimant may seek different interim remedies.

The requirements and purposes should not be confused.

Mediation May Be Relevant to Commercial Claims

Depending on the nature of the commercial monetary claims and applicable procedural requirements, mandatory or voluntary mediation may become relevant before or during the dispute-resolution strategy.

Criminal allegations are governed separately.

Settlement Should Address More Than Money

A shareholder settlement may need to address customer ownership issues, company records, management authority, share transfers, confidentiality, future competition, outstanding receivables and pending proceedings.

A simple payment clause may leave the underlying dispute unresolved.

Foreign Shareholders Should Review Exit Options

Where trust has permanently collapsed, continuing the partnership may no longer be commercially realistic.

Depending on the company type, corporate documents and circumstances, share transfer, separation or other corporate remedies may need to be considered alongside claims concerning past conduct.

Immediate Action Plan

When a foreign partner appears to be diverting customers or company income in Turkey, the affected company or investor should immediately preserve emails and accounting records, secure lawful access to corporate systems, identify diverted customers and payments, obtain banking evidence, review invoices and contracts, examine the partner’s management authority, investigate related companies, calculate actual corporate losses, review contractual and corporate duties, determine whether offense-specific criminal elements exist and evaluate urgent commercial or criminal procedural measures where legally justified.

Frequently Asked Questions

Is diverting company customers automatically a crime in Turkey?

No. Customer diversion can involve commercial, corporate or potentially criminal issues depending on the conduct and evidence.

Is taking company income more serious than taking a customer?

Potentially. Redirecting a receivable that legally belongs to the company can create materially different issues from lawful competition for future business.

Can a shareholder send customers to another company they own?

The answer depends on the shareholder’s role, corporate duties, contractual obligations and the way the customers and business opportunities were transferred.

Can WhatsApp messages prove customer diversion?

They may provide relevant evidence, but authenticity, context and lawful acquisition should be considered.

Can company bank records be used to trace diverted income?

Yes. Bank and accounting records can be particularly important in reconstructing the movement of company receivables.

Can the company seek an urgent injunction?

Depending on the claim, evidence and legal requirements, interim measures may potentially be available where immediate protection is necessary.

Does filing a criminal complaint recover the company’s money automatically?

No. Criminal proceedings and financial recovery should be analyzed separately.

Can the foreign investor personally claim all money lost by the company?

Not necessarily. The distinction between corporate loss and the shareholder’s personal loss must be maintained.

What if the partner uses another company to invoice the customers?

The ownership, management, transactions and relationship between the two companies should be investigated, together with customer communications and payment records.

What should a foreign investor do first?

Preserve the evidence before the dispute escalates. Identify exactly which customers, contracts, invoices and payments were diverted and determine whether the loss belongs to the company or directly to the shareholder. Only then should the conduct be classified as a commercial, corporate, criminal or combined dispute.

Client-Focused Legal Support for Foreign Partner and Company Income Disputes in Turkey

Disputes involving foreign partners can develop into customer diversion, hidden company income, unauthorized bank transfers, related-company transactions, management liability, commercial litigation and criminal investigations. Fırat Fesih Kaya Law Office assists foreign investors, shareholders and international companies facing partner misconduct and corporate asset disputes in Turkey. Lawyer Fırat Fesih Kaya provides legal assistance in preserving financial and digital evidence, reviewing corporate authority, tracing diverted company income, evaluating criminal and commercial claims, seeking appropriate interim measures and coordinating litigation arising from shareholder and management disputes.

Phone: +90 312 434 22 22
Mobile: +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