

Why does MASAK investigate or freeze bank transactions in Turkey? Learn what foreigners should do about suspicious transfers, frozen accounts, fraud-linked money, cryptocurrency transactions, prosecutor seizure orders and asset restrictions.
A foreign national who suddenly discovers that a Turkish bank account has been frozen or transactions have been restricted may immediately be told that the problem is “MASAK.” In practice, however, this expression can describe several legally different situations. The bank may be carrying out its own compliance review, a suspicious transaction may have been reported to the Financial Crimes Investigation Board (MASAK), a particular transaction may have been temporarily suspended under Turkey’s anti-money-laundering legislation, or a prosecutor or court may have imposed a judicial measure during a criminal investigation. Distinguishing these possibilities is critical because not every bank restriction is a MASAK asset freeze, and not every MASAK-related review means that the account holder has committed a crime. Under Law No. 5549, obliged institutions must report suspicious transactions, while Article 19/A separately permits qualifying transactions suspected of links to money laundering or terrorism financing to be suspended or prevented from being completed for up to seven working days for analysis. (Hazine ve Maliye Bakanlığı)
MASAK is Turkey’s Financial Crimes Investigation Board and operates within the country’s framework for preventing laundering of criminal proceeds and terrorism financing.
Foreign nationals often conduct transactions that are inherently international. They may receive salary or investment funds from abroad, transfer savings into Turkey, purchase real estate, establish companies, receive family support, trade internationally or transfer funds between foreign and Turkish bank accounts. None of these activities is inherently illegal. However, cross-border financial activity can require additional customer and transaction analysis where the bank cannot readily establish the source, purpose or ultimate beneficiary of the funds.
No. This distinction should be understood from the beginning. A bank’s suspicious transaction report or MASAK-related financial analysis does not itself amount to a criminal conviction or even necessarily mean that the foreign account holder will be prosecuted.
Under Turkey’s AML framework, obliged institutions must submit suspicious transaction reports where the statutory suspicion conditions are met. MASAK General Communiqué No. 13 states that suspicious transactions are reported without a monetary threshold and that several transactions can be assessed together when their combined pattern creates suspicion. (Hazine ve Maliye Bakanlığı)
Foreigners sometimes ask whether receiving TRY 100,000, TRY 500,000 or TRY 1 million automatically triggers MASAK. That is the wrong way to understand suspicious transaction reporting. The relevant framework does not simply say that every transaction above one universal amount is automatically suspicious.
A EUR 300,000 transfer may be entirely normal for a foreign investor purchasing real estate, while repeated unexplained payments of much smaller amounts from dozens of unrelated individuals can generate significant compliance concerns.
The bank may examine whether a transaction has a reasonable legal and economic purpose, whether it corresponds with the customer’s financial profile and whether the supporting information is consistent.
Repeated payments from unrelated people without an apparent commercial or personal explanation can generate scrutiny.
Funds entering an account and being transferred elsewhere almost immediately can make the account appear to function as a pass-through account.
A large cross-border transfer is not illegal merely because it is large. However, the bank may ask for evidence explaining the source and purpose.
Artificially dividing a transaction without a reasonable explanation can be a red flag. MASAK guidance identifies the unexplained splitting of transactions that would ordinarily be carried out together as a suspicious pattern. (Hazine ve Maliye Bakanlığı)
MASAK guidance also identifies transactions lacking a normal or reasonable legal or economic rationale as potentially suspicious. (Hazine ve Maliye Bakanlığı)
Transfers between Turkish bank accounts and cryptocurrency service providers can receive enhanced scrutiny depending on their pattern, source and destination.
Buying, selling or transferring cryptocurrency does not itself establish money laundering.
Where disputed money moves through cryptocurrency, investigators may reconstruct Bank Account → Crypto Platform → Asset Purchase → Wallet → Subsequent Wallet → Exchange/Cash-Out.
MASAK updated several suspicious transaction reporting guides in September 2025 using sector-specific risks and the updated 2025 National Risk Assessment. It also updated its Enhanced Measures Guide later that month, including guidance concerning higher-risk customers and transactions, technological risks, risky-country financial relationships, crypto-asset service providers, and payment/e-money institutions. These developments remain relevant to the 2026 compliance environment. (Hazine ve Maliye Bakanlığı)
The first question should not be “How do I remove the MASAK freeze?” The first question should be: Who imposed the restriction and what is its legal basis?
The bank itself may restrict certain services while performing customer due diligence or compliance checks.
Article 19/A of Law No. 5549 allows qualifying transactions suspected of links with money laundering or terrorism financing to be suspended or prevented from being completed for seven working days so that the suspicion can be verified and analyzed and, where necessary, the results can be transmitted to competent authorities. (Hazine ve Maliye Bakanlığı)
This is one of the most important points for foreigners. Article 19/A concerns a particular statutory transaction-suspension mechanism. A separate criminal investigation may result in another judicial measure governed by different rules.
If a criminal investigation has begun, an account may be affected by a judicial seizure or another criminal-procedure measure.
Rather than simply asking “Why did MASAK freeze me?”, determine whether the bank can identify the type of restriction and whether there is a prosecutor’s office, court, investigation number or formal decision connected with the account.
Do not expect the bank to confirm a suspicious transaction report. Turkish AML rules impose confidentiality restrictions concerning such reporting.
One of the most common scenarios involves money later alleged to be connected with fraud.
A person contacts a foreign national and says: “My customer will send money to your Turkish account because mine is temporarily unavailable. When it arrives, send it to this other IBAN.”
TRY 400,000 enters the foreign national’s account.
TRY 380,000 is immediately transferred elsewhere and TRY 20,000 is retained.
The account holder can quickly become part of the criminal investigation because their IBAN is visible in the victim’s banking records.
No. Investigators should examine the account holder’s actual knowledge, conduct and role.
Providing an account knowingly for receiving criminal proceeds or acting as an intermediary in return for payment can create substantial criminal exposure depending on the evidence and applicable offense.
A simple denial may not resolve the issue.
This should be established.
This can be crucial.
Investigators may examine communications between the parties.
Preserve those communications.
A retained amount may generate questions about the economic reason for the payment.
Repeated patterns can materially change the evidentiary picture.
Foreign students, employees and newcomers can be targeted by people offering payment in exchange for use of their bank account.
“Receive payments and keep 5%.”
The account holder may unknowingly become an intermediary in fraud, illegal betting or another financial-crime scheme.
Never give another person your banking password, authentication code or unrestricted control of your account.
This becomes an evidentiary question.
Login information, authentication records, communications and device evidence may help determine who executed transactions.
Notify the bank promptly and preserve the security record.
Relevant evidence can include login notifications, password-change records, device information, transaction objections and communications with the bank.
Then the defense should document the real transaction.
Keep the sale agreement, title documentation, valuation information and payment records.
Keep corporate resolutions, capital documentation and bank records.
Keep contracts, invoices, delivery documents and accounting records.
Keep the employment agreement, payroll records and corresponding banking history.
Keep the original loan agreement and evidence of the lender’s transfer.
Keep inheritance and banking documentation.
For substantial transfers, preserve evidence showing the relationship, purpose and source of funds.
Historical foreign bank statements can demonstrate that the money accumulated legitimately over time.
Keep the share purchase agreement, corporate documentation and bank trail showing receipt of the sale proceeds.
Source of funds asks where a particular payment came from. Source of wealth examines how the person accumulated their overall financial position.
A foreign investor transferring EUR 1 million into Turkey may need to demonstrate not only which bank account sent the money but how that EUR 1 million was legitimately acquired.
A useful structure is: Employment/Business/Asset → Income or Sale → Foreign Account → International Transfer → Turkish Account → Final Investment/Purchase.
A foreign national may have no Turkish employment history because all legitimate wealth was accumulated abroad.
Do not assume only Turkish documents matter.
Foreign company ownership and dividend records can establish legitimate income.
Foreign tax records can support the source-of-wealth explanation.
Evidence of a foreign property sale can explain a large transfer into Turkey.
Foreign-language documentation may need to be presented appropriately during Turkish proceedings.
Use the genuine foreign evidence and establish the actual financial chain.
A financial analysis may intersect with a prosecutor’s fraud investigation where money from an alleged victim reaches the foreign national’s account.
Investigators may reconstruct Victim → Account A → Account B → Crypto Exchange → Wallet → Final Recipient.
An organizer, knowing intermediary and genuinely unaware recipient cannot simply be treated as though they performed identical acts.
Foreign investors can also encounter MASAK-related issues through Turkish companies.
Large unexplained transfers, payments to unrelated third parties or transactions inconsistent with the company’s commercial activity may generate scrutiny.
Being registered as a company director does not automatically establish personal responsibility for every banking transaction.
This can be critical.
Corporate authorization records should be examined.
Emails and messages may help establish actual responsibility.
Follow the funds beyond the company account.
Where daily financial management was delegated to a local director or partner, preserve evidence showing the actual division of authority.
Crypto-related financial relationships are specifically within the modern risk-based AML environment. MASAK’s September 2025 Enhanced Measures Guide update expressly addressed measures concerning relationships with crypto-asset service providers. (Hazine ve Maliye Bakanlığı)
Export transaction histories before access becomes unavailable.
Record the wallets connected with disputed transactions.
Blockchain transaction identifiers can help reconstruct the movement of funds.
Do not submit unrelated screenshots. Create a chronological financial chain.
EUR 40,000 foreign transfer → Turkish bank account → TRY conversion → Turkish crypto platform → USDT purchase → Wallet X.
Produce the account-opening information, purchase history and investment records.
Explain why and preserve evidence identifying that person.
Foreigners frequently move significant funds into Turkey to purchase real estate.
But the bank may require evidence of the origin and purpose of the funds.
Purchase agreement, title documentation, payment records and relevant correspondence should be retained.
Where substantial cash movements are involved, contemporaneous evidence becomes particularly important.
Foreign investors acquiring Turkish companies should preserve share purchase agreements and payment records.
Corporate resolutions and capital contribution records should correspond with banking transactions.
Payments between companies under common ownership should have a genuine commercial or corporate explanation.
Document the loan rather than relying on vague transfer descriptions.
Cross-border financial information can become relevant where investigators are attempting to establish the origin or destination of funds.
The same international financial trail may prove that funds were legitimate.
Potentially, where a criminal investigation concerns whether assets are connected with criminal proceeds.
Potentially, depending on the applicable judicial measure and evidence.
Crypto assets can likewise become relevant to asset-tracing investigations.
This distinction matters enormously. A temporary restriction or judicial seizure is not itself a final judgment permanently transferring ownership of the property.
The legal basis and procedural remedies must first be identified.
Yes, and this creates a difficult evidentiary problem.
A Turkish account contains EUR 250,000 accumulated from documented foreign business income. A disputed TRY 500,000 transfer later enters the same account.
The defense should demonstrate the origin of the pre-existing balance rather than allowing the entire account to be characterized as unexplained funds.
For every restricted account identify: Opening Balance → Legitimate Income → Disputed Transactions → Subsequent Payments → Current Balance.
For significant property identify: Asset → Purchase Date → Purchase Price → Source of Funds → Supporting Evidence → Connection Alleged by Authorities.
Moving money to relatives, foreign accounts or cryptocurrency after discovering a criminal investigation can create additional suspicion.
Seek legal analysis before taking actions that may later appear designed to frustrate asset tracing.
Messages may demonstrate that you had no knowledge of the alleged criminal origin of money.
Preserve complete statements.
A fictitious loan or consultancy agreement can create far more serious problems than an initially unexplained payment.
Investigators can examine whether the underlying goods or services actually existed.
For goods, preserve orders, transportation and delivery records.
Preserve reports, correspondence and actual work products.
A document request does not automatically mean a criminal case exists. Banks conduct customer due diligence and transaction monitoring as part of AML compliance.
Do not provide an improvised explanation merely because the bank requests an immediate response.
Contract, invoice, bank payment and accounting record should describe the same genuine transaction.
This distinction determines strategy.
The immediate focus may be source-of-funds and customer documentation.
The statutory temporary transaction mechanism must be identified correctly. (Hazine ve Maliye Bakanlığı)
The defense must determine the alleged offense and obtain the relevant procedural information.
The specific order and available procedural remedies must be examined.
Because it assumes every banking restriction is an Article 19/A postponement.
The correct response depends on the legal basis.
Ask what information can be provided concerning the authority and nature of the restriction.
Where a prosecutor’s investigation exists, identifying the relevant file can be essential.
A foreign national may later be summoned concerning transactions.
Are you being questioned as a witness, complainant or suspect?
Review the bank statement before explaining an old transaction.
For every questioned payment: Date → Sender → Amount → Purpose → Supporting Evidence → Subsequent Transfer → Final Known Beneficiary.
A foreign national who cannot adequately understand Turkish should ensure that statements and proceedings are properly understood.
Financial investigations can depend heavily on precise explanations concerning account ownership and transfer instructions.
Foreign nationals can be recruited through fake employment or investment opportunities.
“You will process customer payments from home and keep a commission.”
Keep advertisements, emails, WhatsApp conversations, Telegram messages, usernames and payment instructions.
Being deceived into participating in a payment chain can be highly relevant to knowledge and intent.
The entire evidence should still be analyzed.
A MASAK-related banking problem does not automatically prohibit a foreigner from leaving Turkey.
If a criminal investigation develops, a court may separately impose judicial-control measures where the legal requirements are met.
A person can physically possess a passport while being subject to a judicial travel restriction.
A MASAK review does not automatically cancel a foreign national’s residence permit.
However, serious financial-crime allegations can potentially create immigration consequences depending on the circumstances.
A foreign national should not assume that a frozen bank account automatically means deportation.
Where the matter develops into a serious criminal investigation, criminal and immigration strategies may need to be coordinated.
Determine which accounts and transactions are restricted, obtain available information from the bank, preserve statements and transaction records, and identify whether a prosecutor or court file exists.
Reconstruct the source and movement of the disputed money.
Original Source → Sender → Your Account → Reason → Subsequent Recipient → Final Known Destination.
Collect contracts, invoices, bank statements, company documents, property records, cryptocurrency history and relevant communications.
Foreign banks may take time to provide historical statements.
Collect corporate and tax records.
Collect ownership and sale documentation.
Document the relationship, purpose and source.
Export exchange and wallet records.
Preserve access and communication evidence.
Do not independently move the funds simply to remove them from your account.
Provide a factually accurate explanation supported by genuine records.
Identify the allegation and relevant transactions before giving a detailed substantive explanation.
Document payroll, rent, suppliers, taxes and contractual payments that cannot be made because of the restriction.
Turkey’s financial compliance framework continues to develop. MASAK introduced and updated sector-specific suspicious transaction guidance during 2025 and expressly incorporated updated national risk assessment and sector-specific risk considerations. (Hazine ve Maliye Bakanlığı)
MASAK’s September 2025 update also emphasized risk-based enhanced measures for higher-risk customers and transactions, technological risks, risky jurisdictions, crypto relationships and payment-sector risks. (Hazine ve Maliye Bakanlığı)
International transactions should be documented before a bank asks questions rather than reconstructed afterward.
Foreign investors moving significant capital into Turkey should retain evidence showing exactly where the funds originated.
Where substantial investments are involved, preserve evidence explaining how the underlying wealth was accumulated.
Do not discard documents after title transfer.
Capital injections and shareholder loans should be properly documented.
Maintain the complete chain between foreign and Turkish accounts.
Do not rely on exchange access remaining available indefinitely.
Payments should generally follow the actual commercial relationship.
Do not allow your account to be used merely to receive and forward someone else’s money.
The correct strategy begins by identifying what has actually happened legally. A foreign national should not assume that every restricted Turkish bank account has been “frozen by MASAK.” First determine whether the issue is an internal bank compliance restriction, suspicious transaction reporting, an Article 19/A temporary transaction suspension or a judicial measure connected with a prosecutor’s investigation. Next, identify the exact transactions that triggered scrutiny and reconstruct their economic purpose using contemporaneous evidence. For legitimate international wealth, establish both source of funds and, where necessary, source of wealth through foreign banking, corporate, employment, property and tax documentation. If fraud-linked money entered the account, determine who supplied the IBAN, what the account holder knew, who instructed subsequent transfers and who ultimately benefited. If cryptocurrency was involved, connect banking records with exchange and blockchain evidence. If a company account was involved, establish who actually controlled banking operations rather than assuming responsibility from corporate title alone. Where an account contains both legitimate funds and disputed transfers, separate those categories through a detailed transaction analysis. The practical roadmap is therefore: identify the type of restriction → identify the authority responsible → determine whether a prosecutor file exists → obtain the relevant decision where possible → identify the questioned transactions → document source of funds → document source of wealth → reconstruct the complete money trail → identify ultimate beneficiaries → preserve communications → obtain foreign banking records → preserve cryptocurrency evidence → establish actual account control → separate legitimate assets from disputed funds → challenge judicial restrictions through the appropriate procedure where available → monitor travel restrictions separately → assess immigration consequences where relevant → maintain a complete evidence file until the matter is resolved.
A transaction may attract scrutiny because of its source, destination, economic purpose, relationship with the customer’s financial profile or connection with other suspicious transactions. Foreign nationality alone does not make a bank transaction suspicious.
No. MASAK’s suspicious transaction framework is not based on one universal monetary threshold. General Communiqué No. 13 states that suspicious transactions are reported without regard to a monetary limit where the applicable suspicion criteria are satisfied. (Hazine ve Maliye Bakanlığı)
Possible explanations include an internal bank compliance restriction, an AML-related temporary transaction suspension or a judicial measure connected with a criminal investigation. The legal basis should be identified before deciding how to challenge the restriction.
No. Article 19/A of Law No. 5549 provides a specific mechanism allowing qualifying transactions to be suspended or prevented for up to seven working days. A separate judicial measure can have a different legal basis and duration. (Hazine ve Maliye Bakanlığı)
No. A suspicious transaction report reflects the statutory suspicion-based reporting mechanism. It is not a finding of criminal guilt.
Depending on the transaction, useful evidence can include foreign and Turkish bank statements, employment records, company accounts, contracts, invoices, property-sale documentation, inheritance records, loan agreements, tax documents and investment statements.
Crypto-related transactions can form part of AML monitoring and financial investigations, particularly where their source or destination raises concerns. Cryptocurrency ownership or trading does not by itself establish criminal activity.
Potentially. The appropriate remedy depends on the legal nature of the restriction, the authority that imposed it and the procedural stage. The actual decision should therefore be identified before an objection is prepared.
A MASAK-related financial review does not automatically result in deportation. Criminal proceedings and immigration measures require separate legal assessment, although serious criminal allegations can potentially create immigration consequences.
Determine the nature and authority of the restriction, preserve bank statements and communications, identify the questioned transactions, document the source and purpose of the funds and determine whether a prosecutor or court file exists. Avoid transferring assets, deleting messages or creating retrospective documents to explain transactions.
Foreign nationals and international businesses facing MASAK-related banking problems in Turkey may encounter blocked transactions, frozen bank accounts, source-of-funds investigations, fraud allegations, cryptocurrency tracing, prosecutor proceedings, asset seizure and related immigration concerns.
Fırat Fesih Kaya Law Office provides legal assistance to foreign nationals, foreign investors, company shareholders, directors and international businesses dealing with MASAK investigations and financial-crime proceedings in Turkey.
Fırat Fesih Kaya can assist with determining the legal basis of bank restrictions, MASAK-related proceedings, frozen bank accounts, suspicious transfer investigations, source-of-funds documentation, cryptocurrency investigations, prosecutor proceedings, judicial seizure objections and related immigration matters.
Phone: +90 312 434 22 22
Mobile Phone: +90 532 769 22 22
Email: info@firatfesihkaya.av.tr
Address: Mevlana Boulevard No: 221, Yildirim Tower, Balgat, Cankaya / Ankara, Turkey